SM5309A

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SEIKO NPC CORPORATION —1 3-channel Video Buffer with Built-in wideband LPF OVERVIEW The SM5309A is a 3-channel video buffer with built-in 5th-order lowpass filters. The lowpass filter cutoff fre- quency range can adjust from 4MHz to 40MHz by 256 steps. The lowpass filter supports 480i to 1080i for- mat, video signal equipment analog input/outputs. For video input systems, the device functions as a next-stage ADC system anti-aliasing filter. For video output systems, the filter reduces video DAC aliasing and external noise and can drive up to 300 Ω load resistance. The cutoff frequency and signal input type can be controlled using an I C-BUS , and the I C slave address can be set by ADS (3-state input) to allow up to three SM5309A on the same bus. *1. When the resistor connected to ISET (R ISET ) is 1.8k Ω *2. I C-BUS is a registered trademark of NXP B.V.

FEATURES

I Supply voltages

• Analog: 4.75 to 5.25V C-BUS interface: 3.0 to 5.5V I Lowpass filter with adjustable cutoff frequency (256 steps)
• Cutoff frequency range: 4MHz to 40MHz ISET 1.8k Ω I Filter bypass mode function for display specifica- tions up to SXGA resolution
• Passband: 80MHz (typ) I Half fc mode switch function (CH-2, CH-3) suit- able for component signals I 2-system input multiplexer function (switchable using I C-BUS or MUXSEL input) I Video input pins can be independently set to sync- tip clamp/bias/direct inputs I Up to 300 Ω load resistance drive capability I Output gain: 0dB I Power-down function 1mA current consumption when power-down I I C-BUS interface control
• Slave address: 90h, 92h, or 94h (up to three devices can be used simultaneously, selected by ADS input)
• Data transfer rate: Fast mode (up to 400kbit/s) I Operating ambient temperature range: 0 to 70 C I Package: 24-pin VSOP

APPLICATIONS

I HDTVs I LCD TVs I PDPs I Projectors

ORDERING INFORMATION

(Top view) PACKAGE DIMENSIONS (Unit: mm) Device Package SM5309AV 24-pin VSOP 1 24IN1A IN1B GND ISET NC IN2A IN2B VCC IN3A IN3B MUXSEL SCL SDA VDD GND OUT3 VCC OUT2 GND OUT1 VCC REF2 REF1 ADS 1312 0 to 10 5.6 ± 0.2 7.6 ± 0.2 7.9 ± 0.2 0.10 ± 0.05 0.65 0.22 − 0.05 + 0.1 0.12 M 0.10 1.15 ± 0.1 0.15 − 0.05 + 0.1 0.5 ± 0.2

SEIKO NPC CORPORATION —2 BLOCK DIAGRAM Note. The recommended value of the external resistor (R ISET ) connected to ISET is 1.8k Ω ADS MUXSEL 5th Order LPFMUX SCL REF2SDA VDD ISET REF1 IN1A IN1B I C Control2 Clamp/Bias/Direct Clamp/Bias/Direct CH-1 Vref Current Source 0dB Bypass Filter MUX IN2A IN2B Clamp/Bias/Direct Clamp/Bias/Direct CH-2 Bypass Filter MUX IN3A IN3B Clamp/Bias/Direct Clamp/Bias/Direct CH-3 Bypass Filter GND OUT3 VCC GND OUT2 VCC GND OUT1 VCC 5th Order LPF 5th Order LPF 0dB 0dB

SEIKO NPC CORPORATION —3 PIN DESCRIPTION Number Name I/O *1. I: input, O: output A/D *2. A: analog, D: digital

Description

1 IN1A I A Video signal input (CH-1, input A)

2 IN1B I A Video signal input (CH-1, input B)

3 GND – A Ground

4 ISET – A Internal current-setting resistor (R

) connection (standard 1.8k Ω

5 NC – – No connection

6 IN2A I A Video signal input (CH-2, input A)

7 IN2B I A Video signal input (CH-2, input B)

8 VCC – A Analog supply

9 IN3A I A Video signal input (CH-3, input A)

10 IN3B I A Video signal input (CH-3, input B)

11 MUXSEL I D

Input multiplexer switch control L (GND): INnA select H (VCC): INnB select

12 SCL I D I

13 SDA I/O D I

C-BUS data signal input/output

14 VDD – DI

15 GND – A Ground

16 OUT3 O A Video signal output (CH-3)

17 VCC – A Analog supply

18 OUT2 O A Video signal output (CH-2)

19 GND – A Ground

20 OUT1 O A Video signal output (CH-1)

21 VCC – A Analog supply

22 REF2 O A Internal reference voltage 2

23 REF1 O A Internal reference voltage 1

24 ADS I D

I C-BUS slave address select (3-state input) L (GND): 90h H (VCC): 92h Open: 94h

SEIKO NPC CORPORATION —4 PIN EQUIVALENT CIRCUITS Number Name I/O Equivalent circuit IN1A IN1B IN2A IN2B IN3A IN3B I OUT1 OUT2 OUT3 O

23 REF1 O

22 REF2 O

SEIKO NPC CORPORATION —5 Note. Resistance values in the equivalent circuits indicate design values.

13 SDA I/O

12 SCL I

11 MUXSEL I

24 ADS I

*1. I: input, O: output Number Name I/O Equivalent circuit VDD SDA GND 250Ω VDD SCL GND 180Ω VCC MUXSEL GND 180Ω VCC ADS GND 250Ω

SEIKO NPC CORPORATION —6 SPECIFICATIONS Absolute Maximum Ratings GND 0V , VCC VDD V CC Recommended Operating Conditions Note. VCC should be applied simultaneously.

Electrical Characteristics

V CC 5.0V , V DD 3.0 to 5.5V , Ta C, fin 100kHz, V IN 1.0Vp-p, R ISET 1.8k Ω , R L 300 Ω CH-1 set to clamp input, CH-2 and CH-3 set to bias input, FCDATA 227, unless otherwise noted. Parameter Symbol Condition Rating Unit Supply voltage V CC VCC, VDD 0.3 to 7.0 V Input voltage V IN ADS, SDA, SCL, INn (n = 1, 2, 3) GND – 0.3 to V CC + 0.3 V Storage temperature range T STG 55 to 125 C Power dissipation *1. Ta = 80 C, when mounted on NPC’s regulation substrate (110 1.6mm double layer glass-epoxy substrate with 160% wiring factor) P D 1.1 W Junction temperature T J 125 C Parameter Symbol Condition Rating Unit Supply voltage 1 V CC VCC 4.75 to 5.25 V Supply voltage 2 V DD VDD 3.0 to 5.5 V Operating ambient temperature Ta 0 to 70 C Parameter Symbol Condition Rating Unit Test levelmin typ max Current consumption 1 *1. Total of current consumption of VCC and VDD, when no input signals. I CC1 Filter mode, FCDATA = 0 65 90 mA I Current consumption 2 I CC2 Filter mode, FCDATA = 255 80 115 mA I Current consumption 3 I CC3 Filter bypass mode 50 75 mA I Current consumption 4 I CC4 Power-down mode 1.0 mA I HIGH-level input voltage V IH1 SDA, SCL 0.7 V DD VI LOW-level Input voltage V IL1 SDA, SCL 0.3 V DD VI ADS, MUXSEL HIGH-level input voltage V IH2 ADS, MUXSEL 0.8 V CC VI ADS, MUXSEL LOW-level input voltage V IL2 ADS, MUXSEL 0.2 V CC VI ADS open-circuit input voltage V OPEN ADS VCC/2 − 0.2 − VCC/2 + 0.2 VI LOW-level input leakage current I LL SDA, SCL, VIN = 0V −− 1.0 µAI HIGH-level input leakage current I LH SDA, SCL, VIN = VDD −− 1.0 µAI SDA output voltage V OL SDA = LOW output, Sink current = 3mA 0 − 0.4 V I

SEIKO NPC CORPORATION —7 AC Characteristics (I2C-BUS) VCC = 5.0V , VDD = 3.0 to 5.5V , Ta = 25°C, unless otherwise noted. Parameter Symbol Condition Rating Unit Test levelmin typ max SCL clock frequency fSCL 0 − 400 kHz II SCL hold time (start condition) t HD;STA 0.6 −− µ sI I SCL clock LOW-level pulsewidth t LOW 1.3 −− µ sI I SCL clock HIGH-level pulsewidth t HIGH 0.6 −− µ sI I SCL setup time (start condition) t SU;STA 0.6 −− µ sI I SDA data hold time t HD;DAT 0 − 0.9 µsI I SDA data setup time tSU;DAT 100 −− ns II SDA, SCL rise time t r −− 300 ns II SDA, SCL fall time t f −− 300 ns II SCL setup time (stop condition) t SU;STO 0.6 −− µ sI I SDA, SCL input capacitance C i −− 10 pF II Note. S, Sr: start condition, P: stop condition SCL SDA tSU;STO tr tLOW tSU;DAT tf tHIGH tSU;STA tHD;STA tHD;STA tHD;DAT SS r P tf tr

SEIKO NPC CORPORATION —8 Analog Characteristics Analog input characteristics CH-1 set to clamp input, CH-2 and CH-3 set to bias input, FCDATA = 227, unless otherwise noted. Internal mode settings are shown in table 1 in "Mode Condition Settings". Note. This item represents values of maximum input signal amplitude in which the output distortion rate shown in the condition column is filled. When the signal amplitude that exceeds this specification value is input, the output distortion rate is deteriorated. When using this device, the input signal level should be set not to exceed the standard value of the signal amplitude. Filter mode and bypass mode frequency characteristics CH-1 set to clamp input, CH-2 and CH-3 set to bias input, FCDATA = 227, unless otherwise noted. Parameter Symbol Condition Rating Unit Test levelmin typ max Clamp voltage VCLMP Clamp input, no signal input 1.6 1.8 2.0 V I Bias voltage VBIAS Bias input, no signal input 2.1 2.3 2.5 V I Input resistance RBIAS Bias input − 20 − kΩ II Filter mode input voltage VAI1 Mode: b (bias), THD < 1.0% −− 1.4 Vp-p I VAI2 Mode: c (clamp), THD < 1.0% −− 1.4 Vp-p I Bypass mode input voltage VAI3 Mode: f (bias), THD < 1.0% −− 1.4 Vp-p I VAI4 Mode: g (clamp), THD < 1.0% – − 1.4 Vp-p I Direct mode input DC voltage range V IDC Direct mode, THD < 1.5%, VIN < 1.4Vp-p 1.5 − 3.2 V I Parameter Symbol Condition Rating Unit Test levelmin typ max Cutoff frequency FC1 FCDATA = 0 − 4.00 − MHz II FC2 FCDATA = 10 4.96 5.64 6.32 MHz I FC3 FCDATA = 227 28.95 32.90 36.85 MHz I FC4 FCDATA = 255 − 40.00 − MHz II Half fc mode cutoff frequency ratio R half1 Half fc mode, FCDATA = 10 42 47 52 % I Rhalf2 Half fc mode, FCDATA = 227 47.5 52.5 57.5 % I 4fc attenuation GSB fin ≥ 4fc, attenuation from fin = 100kHz − 50 − dB II Filter bypass mode passband F BP VIN = 1.0Vp-p, Gain = − 1dB 74.25 80 − MHz II

SEIKO NPC CORPORATION —9 Analog output characteristics CH-1 set to clamp input, CH-2 and CH-3 set to bias input, FCDATA = 227, unless otherwise noted. Internal mode settings are shown in table 1 in "Mode Condition Settings". Reference voltage characteristics VCC = 5.0V , VDD = 3.0 to 5.5V , Ta = 25°C, unless otherwise noted. Test level The definition of “Test Level” shown in the electrical characteristic table is as follows. I : 100% of products tested at Ta = + 25 °C. II : Guaranteed as result of design and characteristics evaluation. Parameter Symbol Condition Rating Unit Test levelmin typ max Filter mode output gain AVF − 0.5 0 0.5 dB I Filter bypass mode output gain A VB − 0.5 0 0.5 dB I Filter bypass mode gain error dA VBP Gain error between filter mode and bypass mode −± 0.2 − dB I Channel to channel gain error dA VCH −− ± 0.2 dB I Maximum output voltage V out Mode: b, c, THD < 1.0% – 1.4 – Vp-p I Output distortion THDB Mode: b, fin = 100kHz, VIN = 1.4Vp-p − 0.2 1.0 % I THDC Mode: c, fin = 100kHz, VIN = 1.4Vp-p − 0.2 1.0 % I Channel to channel crosstalk X TLK1 1.0Vp-p input, fin = 1MHz, between 2 channels −− 80 − dB II MUX input to input crosstalk X TLK2 1.0Vp-p input, fin = 1MHz, between INnA and INnB – − 70 − dB II Drive load resistance R L 1 load = 300Ω− − 1 load I I2C response time TIC Response time from ACK bit output when changing settings using I 2C-BUS −− 1 µsI I Parameter Symbol Condition Rating Unit Test levelmin typ max REF output voltage VR1 REF1 − 3.35 − VI I VR2 REF2 − 2.45 − VI I

Table 1. Mode settings

SEIKO NPC CORPORATION —11 FUNCTIONAL DESCRIPTION I2C-BUS Control The SM5309A uses an I2C BUS interface to set the following functions. 1) Cutoff frequency 2) Input multiplexer selection 3) fc mode switching (1/2 cutoff frequency switching) 4) Filter mode/filter bypass mode switching 5) Input type switching (sync-tip clamp, bias, direct) 6) Power-down function The transfer rate of I 2C-BUS corresponds to the fast-mode (up to 400kbit/s). Note that the SM5309A does not support a read function (IC is write only). Basic cycle The basic access cycle comprises the following elements. 1) Start condition 2) 1st byte: Slave address 3) 2nd byte: Subaddress 4) 3rd byte: Control data 5) Stop condition If the input data does not match the slave address or the subaddress is incorrect, the corresponding ACK (acknowledge) bit is not output LOW. However, the ACK bit is output after 3rd byte irrespective of the byte data. Also note that the IC does not support a subaddress auto-increment function, hence each subaddress access requires all the basic cycle steps 1 to 5. I 2C-BUS start/stop condition SDA SCL Start condition Stop condition SCL SDA Start Stop1st byte:Slave address 2nd byte:Subaddress 3rd byte:Control data D7 D6 D1 D0 Low ACK D7 D6 D1 D0 ACK D7 D6 D1 D0 ACK 27 8 9 1 2 7 8 9 1 27 8 9

SEIKO NPC CORPORATION —12 1st byte: slave address The ADS pin can set one of three slave addresses. Note that D0 must be “0 (Write)”. The input circuit of ADS pin is placed in analog supply (VCC, GND) area. 2nd byte: subaddress The 2nd byte sets the subaddress, selecting one of three registers. 3rd byte: control data The 3rd byte control data sets the register flags corresponding to the subaddress selected by 2nd byte. The flags assigned are shown in the following table. ADS 1st byte: slave address HEX D7 D6 D5 D4 D3 D2 D1 D0 L : G N D 9 0 h 1001000 0 ( W ) H : V C C 9 2 h 1001001 0 ( W ) O p e n 9 4 h 1001010 0 ( W ) Register name 2nd byte: subaddress HEX D7 D6 D5 D4 D3 D2 D1 D0 FCSET 01h 00000001 CONDITION1 02h 00000010 CONDITION2 03h 00000011 Register name 3rd byte: control data D7 D6 D5 D4 D3 D2 D1 D0 FCSET FCM FC6 FC5 FC4 FC3 FC2 FC1 FC0 CONDITION1 CB5 CB4 CB3 CB2 CB1 CB0 − – CONDITION2 PD MUX HALF BYPASS − – −−

SEIKO NPC CORPORATION —13 Flag settings (1) Cutoff frequency Register name: FCSET Flag names: FCM, FC [6:0] The FCSET register setting sets the cutoff frequency using one of two tuning adjustment functions, thus a total of 256 steps are possible. (2) Input type switching (sync-tip clamp, bias, direct) Register name: CONDITION1 Flag names: CB [5:4], CB [3:2], CB [1:0] These flags set the input type of CH-1, CH-2, and CH-3 to one of three types: sync-tip clamp input, bias input, or direct input. FCDATA FCSET Flag name Cutoff frequency [MHz] Default FCM FC6 FC5 FC4 FC3 FC2 FC1 FC0 0 0 0 h 00000000 4.00 1 0 1 h 00000001 4.18 2 0 2 h 00000010 4.35 1 2 5 7 D h 01111101 21.66 1 2 6 7 E h 01111110 21.79 1 2 7 7 F h 01111111 21.92 1 2 8 8 0 h 10000000 7.51 1 2 9 8 1 h 10000001 7.82 1 3 0 8 2 h 10000010 8.11 2 5 3 F D h 11111101 39.46 2 5 4 F E h 11111110 39.72 2 5 5 F F h 11111111 40.00 Channel Flag name Input type DefaultCH-1 CH-2 CH-3 CB5 CB3 CB1 CB4 CB2 CB0 L L Sync-tip clamp input L H Bias input H Don't care Direct input *1. An input coupling capacitor should not be connected when direct input is selected.

SEIKO NPC CORPORATION —14 (3) Power-down mode select Register name: CONDITION2 Flag name: PD This flag selects standard/power-down for the analog block. (4) Input multiplexer selection Register name: CONDITION2 Flag name: MUX This flag selects the A or B input for all three channels (IN1×, IN2×, IN3×). Note that this flag is significant only when the MUXSEL input is LOW. See “Input Multiplexer Switching (MUXSEL)”. (5) fc mode switching (1/2 cutoff frequency switching) Register name: CONDITION2 Flag name: HALF This flag switches the cutoff frequency of CH-2 and CH-3 to divide the value set by the FCSET register into halves. Note that the CH-1 cutoff frequency cannot be switched to 1/2. This mode is suitable for systems where the sampling frequency varies due to Y , Cr, and Cb requirements, such as component signals. (6) Filter bypass mode Register name: CONDITION2 Flag name: BYPASS This flag allows the internal lowpass filter in SM5309A to be bypassed. Even in filter bypass mode, the input type and multiplexer function can all be set just as in filter mode. However, the cutoff frequency and fc mode settings have no effect on the outputs. Flag name Mode Default PD L Standard (normal operation) H Power-down (no operation) Flag name Input selection*1 *1. n = 1, 2, 3 Default MUX LI N n A HI N n B Flag name fc mode Default HALF L Standard fc mode (CH-1, CH-2, CH-3 cutoff frequency is identical) H Half fc mode (CH-2, CH-3 cutoff frequency is 1/2 that of CH-1) Flag name Filter Default BYPASS L Filter mode (signals pass through lowpass filter) H Filter bypass mode (signals bypass lowpass filter)

FCDATA data. The cutoff frequency vs. FCDATA values are listed in table 2, and shown graphically in figure 1. Table 2. Cutoff frequency vs. FCDATA (RISET = 1.8kΩ)

1.8kΩ. In power-down mode and filter bypass mode, no current flows into RISET. maximum rating for the package. nal (Cr, Cb) requirements as in component signals. between CH-1 and CH-2/CH-3 varies. passband frequency is 80MHz (typ), which can support SXGA-class signals. Figure 1. Cutoff frequency vs. FCDATA (R

SEIKO NPC CORPORATION —17 Power-ON Reset When power is applied, an internal power-ON reset circuit operates initializing the internal register flags to their default settings. At power-ON, all supplies should be applied simultaneously. Reference Voltage (REF) The REFn pins (n = 1, 2) are internal reference voltage outputs. A 10 µF capacitor connected between pin and ground is recommended for stability of movement. REF1 and REF2 are independent reference voltage outputs, and have no correspondence with settings of CH-1, CH-2, and CH-3.

SEIKO NPC CORPORATION —24 NC0604CE 2007.04 Please pay your attention to the following points at time of using the products shown in this document. The products shown in this document (hereinafter “Products”) are not intended to be used for the apparatus that exerts harmful influence on human lives due to the defects, failure or malfunction of the Products. Customers are requested to obtain prior written agreement for such use from SEIKO NPC CORPORATION (hereinafter “NPC”). Customers shall be solely responsible for, and indemnify and hold NPC free and harmless from, any and all claims, damages, losses, expenses or lawsuits, due to such use without such agreement. NPC reserves the right to change the specifications of the Products in order to improve the characteristic or reliability thereof. NPC makes no claim or warranty that the contents described in this document dose not infringe any intellectual property right or other similar right owned by third parties. Therefore, NPC shall not be responsible for such problems, even if the use is in accordance with the descriptions provided in this document. Any descriptions including applications, circuits, and the parameters of the Products in this document are for reference to use the Products, and shall not be guaranteed free from defect, inapplicability to the design for the mass-production products without further testing or modification. Customers are requested not to export or re-export, directly or indirectly, the Products to any country or any entity not in compliance with or in violation of the national export administration laws, treaties, orders and regulations. Customers are req uested appropriately take steps to obtain required permissions or approvals from appropriate government agencies. SEIKO NPC CORPORATION 1-9-9, Hatchobori, Chuo-ku, Tokyo 104-0032, Japan Telephone: +81-3-5541-6501 Facsimile: +81-3-5541-6510 http://www.npc.co.jp/ Email: sales @npc.co.jp