STV1389AQ STMICROELECTRONICS | Alldatasheet

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CABLE DRIVER FOR DIGITAL TRANSFER November 1992 VEE VEE VEE VEE INX GND6 GND7 GND GND GND GND GND5 GND4 GND2 GND3 GND GND GND INY 24 17 18192023 21 22 1 2345678 N.C. N.C. N.C. N.C. N.C. N.C. N.C. 1389-01.EPS PIN CONNECTIONS QFP32 (Plastic Package) ORDER CODE : STV1389AQ .1 DIFFERENTIAL INPUT, 3 DIFFERENTIAL OUTPUTS .SUFFICIENT DRIVE CAPABILITY FOR A 300m LENGTH COAXIAL CABLE .STABILITY DUE TO MINIMAL WAVEFORM DISTORTION .BIPOLAR SILICON MONOLITHIC IC

APPLICATIONS

.DATA TRANSFER BETWEEN DIGITAL SIG- NAL PROCESSING EQUIPMENT

DESCRIPTION

The STV1389AQoffers in a single-chip a complete IC driver for digital data transfer.

Equivalent Circuit Description INY INX - 2.7V Input pin of the differential amplifier. Input executed after DC portion is cut off. GND2 GND3 GND4 GND5 GND6 GND7 Collector of the emitter follower output Tr. Connect to GND. - 2.7V Emitter of emitter follower output Tr. To use, connect pull-down resistor. (Even when only 1 side is used pull-down is executed In pairs.) Pairs 32 16 23 32 0 2 7 1389-01.TBL GND VEE 1mA 1mA 180 Ω 2kΩ 180 Ω 2kΩ 1389-02.EPS GND VEE 1mA Ω 1389-03.EPS STV1389AQ

-5V VEE VEE VEE VEE INX GND6 GND7 GND GND 3A GND GND 2B GND5 GND4 GND2 GND3 1B GND GND GND INY Co-axial cable -5V 0.1µF 150 Ω 75 Ω 1.6Vp-p 0.6Vp-p 0.6Vp-p 0.1µF 0.1µF N.C. N.C. N.C. N.C. N.C. N.C. N.C. When the below input is applied between INX and INY, in-phase 1.6Vp-p is output at 1A, 2A and 3A. In reversedphase, 1.6Vp-p is output at 1B, 2B and 3B. * Various output pins are connected as indicated below. 1389-04.EPS BLOCK DIAGRAM ABSOLUTE MAXIMUM RATINGS Symbol Parameter Value Unit VCC Supply Voltage 7.0 V Tstg Storage Temperature - 65, + 150 oC PD Allowable Power Dissipation 500 mW 1389-02.TBL OPERATING CONDITIONS Symbol Parameter Value Unit VCC Supply Voltage 4.8 to 5.2 V Topr Operating Temperature - 20, + 75 oC 1389-03.TBL

ELECTRICAL CHARACTERISTICS

Symbol Parameter Bias Conditions SW ON Test Point Test Min. Typ. Max. Unit V INY V INX V1 Pin Voltage INY - - - Pin 7 Test of pin voltage V2 Pin Voltage INX - - - PIn 9 - 2.9 - 2.7 - 2.5 V A1-1 PIn Voltage 1A - - - Pin 32 - 3.1 - 2.7 - 2.5 V B1-1 Pin Voltage 1B - - - Pin 3 - 3.1 - 2.7 - 2.5 V A2-1 PIn Voltage 2A - - - Pin 16 - 3.1 - 2.7 - 2.5 V B2-1 Pin Voltage 2B - - - Pin 3 - 3.1 - 2.7 - 2.5 V 1389-04.TBL STV1389AQ

ELECTRICAL CHARACTERISTICS (TA =2 5oC) Symbol Parameter Bias Conditions SW ON Test Point Test Min. Typ. Max. Unit V INY V INX A3-1 PIn Voltage 3A - - - Pin 23 Test of pin voltage - 3.1 - 2.7 - 2.5 V B3-1 Pin Voltage 3B - - - Pin 27 - 3.1 - 2.7 - 2.5 V IEE Current Power Supply - - - VEE Current power supply at VEE - 143 - 77 mA A1-2 DC applied 1A V1 + 0.2 V2 - 0.2 SW1 SW2 Pin 32 Output DC voltage is tested when +0.2V is applied to INY and - 0.2V to INX. (A1-2) = Test value - (A1-1) (B1-2) = Test value - (B1-1) The difference with the previous pin voltage is recorded. Same for A2-2, B2-2, A3-2, B3-2 0.31 0.39 0.47 V B1-2 DC applied 1B ↓↓ Pin 3 - 0.47 0.39 0.31 V A2-2 DC applied 2A ↓↓ Pin 16 0.31 0.39 0.47 V B2-2 DC applied 2B ↓↓ Pin 20 - 0.47 0.39 0.31 V A3-2 DC applied 3A ↓↓ Pin 23 0.31 0.39 0.47 V B3-2 DC applied 3B ↓↓ Pin 27 - 0.47 0.39 0.31 V V1-1 Amplitude 1A + 1B Calculation Amplitude calculated from T10 with T15 as base, same for V2-1, V3-1. 0.65 0.75 0.85 V V2-1 Amplitude 2A + 2B Calculation 0.65 0.75 0.85 V V3-1 Amplitude 3A + 3B Calculation 0.65 0.75 0.85 V - Amplitude 1A/1B Calculation (A1-2) / (B1-2) 0.85 1.0 1.15 - - Amplitude 2A/2B Calculation 0.85 1.0 1.15 - - Amplitude 3A/3B Calculation 0.85 1.0 1.15 - A1-3 DC applied 1A’ V1 - 0.4 V1 + 0.4 SW1 SW2 Pin 32 Output DC voltage is tested when - 0.4V is applied to INY and + 0.4V to INX. (A1-3) = Test value - (A1-1) (B1-3) = Test value - (B1-1) The difference with the previous pin voltage is recorded. Same for A2-3, B2-3, A3-3, B3-3 - 0.9 - 0.75 - 0.6 V B1-3 DC applied 1B’ ↓↓ Pin 3 0.6 0.75 0.9 V A2-3 DC applied 2A’ ↓↓ Pin 16 - 0.9 - 0.75 - 0.6 V B2-3 DC applied 2B’ ↓↓ Pin 20 0.6 0.75 0.9 V A3-3 DC applied 3A’ ↓↓ Pin 23 - 0.9 - 0.75 - 0.6 V B3-3 DC applied 3B’ ↓↓ Pin 27 0.6 0.75 0.9 V V1-2 Amplitud’e 1A’ + 1B Calculation Amplitude calculated from T22 with T27 as base, same for V2-2, V3-2. 1.3 1.5 1.7 V V2-2 Amplitude 2A’ + 2B’ Calculation 1.3 1.5 1.7 V V3-2 Amplitude 3A’ + 3B’ Calculation 1.3 1.5 1.7 V - Amplitude 1A’ + 1B’ Calculation (A1-3) / (B1-3) 0.85 1.0 1.15 V - Amplitude 2A’ + 2B’ Calculation (A2-3) / (B2-3) 0.85 1.0 1.15 V - Amplitude 3A’ + 3B’ Calculation (A3-3) / (B3-3) 0.85 1.0 1.15 V V1-3 Linearity 1 Calculation (V1-2) / (V1-1) 1.7 1.9 2.1 V V2-3 Linearity 2 Calculation (V2-2) / (V1-1) 1.7 1.9 2.1 V V3-3 Linearity 3 Calculation (V3-2) / (V1-1) 1.7 1.9 2.1 V 1389-05.TBL STV1389AQ

-5V VEE -5V 150 Ω 150 Ω 150 Ω 150 Ω 150Ω 150 Ω 1389-05.EPS TEST CIRCUIT DESCRIPTION OF OPERATION The STV1389AQ consists of 3 differential amplifier with a common input and a bias generator, and three differential outputs. Each amplifiers provides a 6dB gain and is configuredas a differential output feeding the bases of a pair of current boosting on-chip emitter follower transistors. The differential input pins are internally biased and the input signal is ac-coupled to remove the D.C. component. Between the output pins of each differential ampli- fier and the coaxial cable, an R-C network is con- nected to remove D.C. component from the output and for impedance matching. The series resistor has a value of 68 to 75Ω to match a 75Ω coaxial cable. In this manner a signal almost identitical in level to the input signal is transferred to the coaxial cable. Optimum PCB layout and matching resistor value are chosen to obtain good eye patterndesign at the input pins. This is necessary because the wave- form distortion at the input pins is directly trans- ferred to the output waveform. BIAS GEN 0.1µF 150Ω 75 Ω 0.1µF 150Ω 75 Ω 75 Ω 0.1µF 0.1µF 0.1µF 75 Ω -5 V 75 Ω Co-axial cable DC cut 6dB Differential amplifier To the other 2 channels0.6V 1.5V STV1389AQ DC cut Signal source = 0.8Vpp Matching resistor Matching resistor 1389-06.EPS STV1389AQ

-5V -5V 150Ω STV1389AQ Top View Same as Block A Same as Block A 0.1µF 150Ω STV1601A Serial Encoder 0.1µF 0.1µF ΩΩ220 220 *R3 *R1 10 Ω Ω*R2 10 -5V -5V 0.1µF 0.1µF 150 Ω Ω750.1µFΩ75 Block A Keep the GND pin pattern as short as possible and providesufficient GND. A weak GND will cause unstable operation Since power consumptionis large, conceive a pattern takingdueconsideration of the radiationfrom the PCB. Exampleof output waveform Ω V = 200mV/div H = 1ns/div Keep unused output pins (both collector an emitter) open. Even when only one output side is in use, connect both the pull-down resistance and the collector. Signalrate 270Mbps 75 for terminatingpin 10 / 16V Tantalum capacitor The marked* resistor is altered throughthe PCB pattern. Adjustmentis performed to obtain a goodeye pattern at Pins 7 and 9. 1389-07.EPS TEST CIRCUIT STV1389AQ

9.0 0.2 7.0 0.35 0.151.5 0.2 0.10.127 0.1 0.05 0.15 0.10 24 17 0.50 8.0 0° -1 0° 0.15 0.12 M 0.3 0.1 0.1 Dimensions in mm 0.30.8 PM-QFP32.EPS PACKAGE MECHANICAL DATA

32 PINS - PLASTIC QUAD FLAT PACK

Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No licence is granted by implication or otherwise under anypatent or patent rights of SGS-THOMSON Microelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. SGS-THOMSON Microelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of SGS-THOMSON Microelectronics.  1994 SGS-THOMSON Microelectronics - All Rights Reserve d Purchase of I 2C Components of SGS-THOMSON Microelectronics, conveys a license under the Philips I2C Patent. Rights to use these components in a I2C system, is granted provided that the system conforms to the I2C Standard Specifications as defined by Philips. SGS-THOMSON Microelectronics GROUP OF COMPANIES Australia - Brazil - China - France - Germany - Hong Kong - Italy - Japan - Korea - Malaysia - Malta - Morocco The Netherlands - Singapore - Spain - Sweden - Switzerland - Taiwan - Thailand - United Kingdom - U.S.A. STV1389AQ