WF5091A NPC | Alldatasheet
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Technical content
32kHz output Crystal Oscillator IC with Frequency Adjustment Function S E I K O N P C C O R P O R A T I O N - 1 OVERVIEW The WF5091A is a 32.768kHz output crystal oscillator module IC with built-in frequency adjustment functions by EEPROM. The WF5091A is ideal for wide range of operating supply voltage, low current consumption, low jitter, crystal oscillator module.
FEATURES
▪ Oscillation and output frequency: 32.768kHz ▪ Wide range of operating supply voltage: 1.2 to 5.5V ▪ Operating temperature of oscillation operation: -40 to +85°C ▪ Low current consumption: 1A typ. (VDD=3.3V , no load) ▪ CMOS input / output ▪ ±0.4mA output drive capability (VDD=3.3V) ▪ f0 adjustment function by EEPROM (3-wire serial interface) ▪ Output disable function
ORDERING INFORMATION
(Unit: m) Chip size: 0.95mm × 0.88mm Wafer thickness: 130 ± 15m P A D s i z e : 8 5m C h i p b a s e : VSS level (950,880) (0,0) X Y VDD XT XTN INHN VSS VPP Q PIN DESCRIPTION and PAD COORDINATES PAD coordinate [m] No. PIN I/O*1 Description X Y 1 VDD - (+) supply voltage 112.5 648.8 2 XT I Crystal input connection pin 112.5 514.8 3 XTN O Crystal output connection pin 112.5 332.2 INHN (SCLK) I Input pin controlled output state (Hi-Z output at LOW, 32.768kHz output at HIGH, OPEN connection prohibit) SCLK (Clock input) pin in serial interface mode 112.5 120.5 5 VSS - (-) ground 837.5 120.5
6 VPP -
Serial interface enable pin HIGH: serial interface mode (EEPROM read/write), LOW or OPEN: normal mode Pull-down resistor built-in 837.5 332.2 Q (SDATA) I/O 32.768kHz output pin SDATA (Data input/output) pin in serial interface mode 837.5 596.5 *1. I/O: Input / Output pin I: Input pin O: Output pin BLOCK DIAGRAM Serial interface EEPROM SCLKC6-0 XT XTN SDATA VDD INHN VSS Q VPP
Vss=0V Parameter Symbol Conditions Rating Unit Supply voltage*1 V DD Between VDD and VSS -0.3 to +6.5 V Program supply voltage*1 V PP Between VPP and VSS -0.3 to +22.0 V Input voltage 1*1*2 V IN Q pin -0.3 to VDD+0.3 V Input voltage 2*1 V IN2 INHN pin -0.3 to +6.5 V Output voltage*1*2 V OUT Q pin -0.3 to VDD+0.3 V Output current*3 I OUT Q pin ±3 mA Junction temperature*3 T j - +125 °C EEPROM rewrite cycles*3 N EW - 100 times Storage temperature*4 T STG - -65 to +150 °C *1. This parameter rating is the values that must never exceed even for a moment. This product may suffer breakdown if this parameter rating is exceeded. Operation and characteristics are guaranteed only when the product is operated at recommended operating conditions. *2. VDD is a VDD value of recommended operating conditions. *3. Do not exceed the absolute maximum ratings. If they are exceeded, a characteristic and reliability will be degraded. *4. When stored in nitrogen or vacuum atmosphere applied to IC itself only (excluding packaging materials). Recommended Operating Conditions Vss=0V Rating Parameter Symbol Conditions MIN TYP MAX Unit Operating supply voltage VDD Between VDD and VSS*1 1.2 5.5 V Input voltage VIN Input pins VSS VDD V VPPW VPP pin, EEPROM write mode Ta=25°C , VDD=3.0 to 3.6V 19.0 20.0 Program supply voltage VPPR VPP pin, EEPROM read mode T a=25°C , VDD=3.0 to 3.6V 1.8VDD 7.0 V Operating temperature Ta Condensation free -40 +85 °C *1. Mount a ceramic chip capacitor that is larger than 0.1μF proximal to IC between VDD and VSS in order to obtain stable operation of WF5091A. In addition, the wiring pattern between IC and capacitor should be as wide as possible. Note. Since it may influence the reliability if it is used out of range of recommended operating conditions, this product should be used within this range.
Electrical Characteristics
V DD=1.2 to 5.5V , VSS=0V , Ta=-40 to +85°C, CLOUT=15pF unless otherwise noted. Rating Parameter Symbol Conditions MIN TYP MAX Unit Measurement circuit 1, CLOUT=0pF INHN=“H”, VDD=3.3V 1.0 2.0 IDD1 Measurement circuit 1, CLOUT=0pF INHN=“H”, VDD=5.5V 1.7 3.2 Measurement circuit 2, CLOUT=15pF INHN=“H”, VDD=3.3V 2.7 3.7 Operating current consumption IDD2 Measurement circuit 2, CLOUT=15pF INHN=“H”, VDD=5.5V 4.4 5.9 Current consumption in boot function IBOOT Measurement circuit 1, boot*1 CLOUT=0pF, VDD=3.3V 1.5 2.5 A Current consumption in disable function IDIS Measurement circuit 1, INHN=Low, VDD=3.3V 0.9 1.5 A Measurement circuit 4, IOH=-0.4mA 1.5V≤VDD≤5.5V VDD-0.4 High-level output voltage VOH Measurement circuit 4, IOH=-0.1mA 1.2V≤VDD<1.5V VDD-0.4 V Measurement circuit 4, IOL=0.4mA 1.5V≤VDD≤5.5V 0.4 V Low-level output voltage VOL Measurement circuit 4, IOL=0.1mA 1.2V≤VDD<1.5V 0.4 V Measurement circuit 5, INHN pin 1.2V≤VDD<1.5V 0.8VDD High-level input voltage 1 VIH1 Measurement circuit 5, INHN pin 1.5V≤VDD≤5.5V 0.7VDD V Measurement circuit 5, INHN pin 1.2V≤VDD<1.5V 0.2V DD Low-level input voltage 1 VIL1 Measurement circuit 5, INHN pin 1.5V≤V DD≤5.5V 0.3V DD V High-level input voltage 2 VIH2 Measurement circuit 5, VPP pin, Ta=25°C VDD=3.0 to 3.6V 1.8VDD V Low-level input voltage 2 VIL2 Measurement circuit 5, VPP pin, Ta=25°C VDD=3.0 to 3.6V 1.3V DD V VPP pull-down resistor Rpd 100 kΩ *1. Boot function operates from oscillation start to 0.5s (tsta+0.5sec) after applying power supply.
AC Characteristics 1 (Clock Output Characteristics) V DD=1.2 to 5.5V , VSS=0V , Ta=-40 to +85°C, CLOUT=15pF unless otherwise noted. Rating Parameter Symbol Conditions MIN TYP MAX Unit Output duty cycle DUTY Measurement circuit 2 1.2V≤VDD≤5.5V , Vth=0.5VDD 45 50 55 % Output rise time tr Measurement circuit 2 0.2V DD→0.8VDD 200 ns Output fall time tf Measurement circuit 2 0.8VDD→0.2VDD 200 ns Output enable delay time tOE Measurement circuit 3 16 s Output disable delay time tOD Measurement circuit 3 16 s Q tftr T T W DUTY=T W /T×100(%) 0.2VDD0.2VDD DUTY measurement volt age 0.5VDD 0.8VDD0.8VDD Ou tput switching waveform
AC Characteristics 2 (Serial Interface Characteristics) V DD=3.0 to 3.6V , VSS=0V , Ta=25°C, CLOUT=5pF unless otherwise noted. Rating Parameter Symbol Conditions MIN TYP MAX Unit VPP setup time tSS 1 s VPP hold time tSH 1 s VPP deselect time tSDS 1 s SCLK setup time tCS 1 s EEPROM write mode 20 ms SCLK HIGH-level pulse width tWH EEPROM read mode 2 s EEPROM write mode 2 s SCLK LOW-level pulse width tWL EEPROM read mode 2 s SCLK rise/fall time tRF 0.1V DD-0.9VDD, 0.9VDD-0.1VDD 100 ns Write data setup time tDS 1 s Write data hold time tDH 1 s Read data delay time tRD C LOUT=5pF 1 s tDH tRD DATA tWL tSS tWH tDS tSDS DATA DATA Q (SDATA) VPP INHN (SCLK) READ WRITE Q (SDATA) tCS tSH DATA tRF tRF 0.1VDD 0.9VDD0.5VDD 0.5VDD VIL2 VPPW, VPPR S erial interface timing chart Note. EEPROM read/write in serial interface mode is limited to VDD=3.0 to 3.6V .
Q outputs 32.768kHz when INHN connects HIGH level. Q outputs Hi-Z and the oscillator circuit works when INHN connects LOW level. Oscillation does not stop. Always ensure to input VIH1 or VIL1 to INHN. INHN Q Oscillator Remarks HIGH 32.768kHz Operating - LOW Hi-Z Operating - OPEN - - Prohibit EEPROM Program Specification Serial interface only for an EEPROM program The WF5091A transfers data using a 3-wire serial interface only for an EEPROM. Oscillation frequency can be adjusted by setting up oscillation part capacitor using this serial interface. EEPROM read/write in serial interface mode is limited to VDD=3.0 to 3.6V . Timing chart of serial interface Q (SDA TA) VPP INHN (SCLK) MC X C1 C0 Serial I/F WE C5 C3 C2C4C6 19～20V D1 D0 E E P R O M w r i t e m o d e Q (SDA TA) VPP INHN (SCLK) MC C3 C1 C0C2 Serial I/F WE C3 C1 C0C2C5 C4C6 1.8VDD～7V HiZD1 D0 EEPROM data output E E P R O M r e a d m o d e When VPP input voltage rise above V IH2, the IC enters serial interface mode. In serial interface mode, INHN is the clock input (SCLK), and Q is the data input /output (SDATA). In EEPROM write mode, VPP input voltage should be VPPW (19 to 20V), and SDATA is written in HIGH-level of SCLK. In EEPROM read mode, VPP input voltage should be VPPR (1.8VDD to 7.0V), and EEPROM data is output on the falling edge of the 5th clock pulse of SCLK. When the VPP input voltage falls bellow VIH2 or open, normal operation resumes.*1 *1. When the VPP input voltage rises above 7V , data may be rewritten.
Serial interface bit description (1)WE, MC Operation mode setup WE MC Operation mode Note 0 0 EEPROM read mode Internal EEPROM data read mode. Used to check EEPROM write status. 1 0 EEPROM write mode Internal EEPROM data write mode. Unless VPP input voltage is VPPW (19 to 20V), EEPROM write is not performed normally. 0 1 1 1 Test mode IC test mode. Since this mode is the mode for IC test, use of this mode is prohibition. Note. SCLK HIGH-level pulse width (tWH) after MC bit should be over 20ms in EEPROM write mode. (2)D1, D0 Fixed bit. “D1” and “D0” should set up “0”. (3)X Don’t care bit. “X” set up “0” or “1”. (4)C6 to C0 (C[6:0]) Capacitance setting bit for f 0 adjustment. C LOSC increments as the code increment every 1LSB. Refer to the following table for a setup. Function Capacitance (pF) Bit “1” “0” XT XTN C0 ON OFF 0.14 0.14 C1 ON OFF 0.28 0.28 C2 ON OFF 0.56 0.56 C3 ON OFF 1.12 1.12 C4 ON OFF 2.24 2.24 C5 ON OFF 4.48 4.48 C6 ON OFF 8.96 8.96 CLOSC: Oscillator circuit equivalent load capacitance Also oscillator circuit load capacitance 6.0pF (Max) is added between XT and XTN.
EEPROM (f0 adjustment) data setting timing chart EEPROM data is read at the following timing inside IC. (1)Start-up EEPROM data output timing chart (start-up) VDD Q CLosc C[6:0] ALL 0 EEPROM data EEPROM setting data is reflected in the O (output frequency) at the falling edge of the rt. F * z). 195th(about 0.25s) clock from oscillation sta About 0.25s from oscillationstart(Q=32.768kH EEPROM setting data is reflected in the Q (output frequency) at the falling edge of the 8195th (about 0.25s) clock from oscillation start. *About 0.25s from oscillation start (Q=32.768kHz). (2)Nor mal operation E E P R O M d a t a o u t p u t t i m i n g c h a r t ( n o r m a l o p e r a t i o n ) (3)After EEPROM program operation E E P R O M d a t a o u t p u t t i m i n g c h a r t ( a f t e r E E P R O M p r o g r a m o p e r a t i o n ) Power On Clear (POC) Function The WF5091A has a power-on-clear function. Interval of power reapply should be more than 1s. Q EEPROM data EEPROM data EEPROM data 32768 clock * kHz). Read after every 32768-clock. 1s from oscillation start(Q=32.768 * 1 s ( Q = 3 2 . 7 6 8 k H z ) Q CLosc C[6:0] After EEPROM read mode INHN VPP EEPROM data EEPROM data EEPROM dataALL 0 CLosc C[6:0] After EEPROM write mode 3 clock CLosc C[6:0] Read on the falling edge of the 3rd clock after INHN=LOW→HIGH. VDD POC tVDD<10ms/V tVDD: Supply voltage rise time to VDD(MIN). Interval of power reapply MIN 1sInterval of power reapply: MIN 1s P OC="H" : Boot function operates L 0EEPROM data = ALCLOSCsettings = ALL 0
SEIKO NPC CORPORATION - 10 MEASUREMENT CIRCUITS MEASUREMENT CIRCUIT 1 Measurement Parameter: IDD1, IBOOT, IDIS VDD VSS Q INHN XTN XT A Crystal 0.1μF IDD A B A: IDD1, IBOOT B: IDIS MEASUREMENT CIRCUIT 2 Measurement Parameter: IDD2, DUTY , tr, tf VDD VSS Q INHN XTN XT A Crystal 0.1μF IDD, IDIS CLOUT=15pF (Including probe capacitance) *AC characteristic monitors Q terminal with an oscilloscope. MEASUREMENT CIRCUIT 3 Measurement Parameter: tOE, tOD VDD VSS Q INHN XT 0.1μF CLOUT=15pF Signal Generator RL=10kΩ Signal Generator 0.001μF 50Ω XT input signal:1Vp-p,sine wave tOE: INHN L→H tOD: INHN H→L
SEIKO NPC CORPORATION - 11 MEASUREMENT CIRCUIT 4 Measurement Parameter: VOH, VOL VDD VSS QXT 0.1μF VOH VOL Signal Generator 0.001μF 50Ω XT input signal:1Vp-p,sine wave V 2kΩ 0.1μF VS ΔV VOH VS ΔV VOL VS ΔV=VQ-VS VS adjusted so that ΔV=2kΩ×IOH ΔV=VQ-VS VS adjusted so that ΔV=2kΩ×IOL MEASUREMENT CIRCUIT 5 Measurement Parameter: VIH, VIL VDD VSS Input pins 0.1μF INHN, Q, VPP *Apply a voltage to input pins to monitor the change in state. V MEASUREMENT CIRCUIT 6 Measurement Parameter: CLOSC VDD VSS 0.1μFXTN XTImpedance Analyzer (Agilent4396B etc.)
SEIKO NPC CORPORATION - 12 DEFAULT EEPROM WRITE CODE Devices are shipped with these values, but this code data set is not guaranteed. The EEPROM data retention deteriorates when subjected [exposed] to UV rays, high temperatures, plasma and other extremes. Strictly observe the following USAGE NOTES. C6 C5 C4 C3 C2 C1 C0 0 1 1 0 0 1 1 USAGE NOTES Writing All Bits in EEPROM While NPC device EEPROM write code may be used as-is, we strongly urge that all bits in all registers be rewritten in EEPROM under the prescribed conditions at the customer’s company.
SEIKO NPC CORPORATION - 13 Please pay your attention to the following points at time of using the products shown in this document. 1. The products shown in this document (hereinafter ”Products”) are designed and manufactured to the generally accepted standards of reliability as expected for use in general electronic and electrical equipment, such as personal equipment, machine tools and measurement equipment. The Products are not designed and manufactured to be used in any other special equipment requiring extremely high level of reliability and safety, such as aerospace equipment, nuclear power control equipment, medical equipment, transportation equipment, disaster prevention equipment, security equipment. The Products are not designed and manufactured to be used for the apparatus that exerts harmful influence on the human lives due to the defects, failure or malfunction of the Products. If you wish to use the Products in that apparatus, please contact our sales section in advance. In the event that the Products are used in such apparatus without our prior approval, we assume no responsibility whatsoever for any damages resulting from the use of that apparatus. 2. NPC reserves the right to change the specifications of the Products in order to improve the characteristics or reliability thereof. 3. The information described in this document is presented only as a guide for using the Products. No responsibility is assumed by us for any infringements of patents or other rights of the third parties which may result from its use. No license is granted by implication or otherwise under any patents or other rights of the third parties. Then, we assume no responsibility whatsoever for any damages resulting from that infringements. 4. The constant of each circuit shown in this document is described as an example, and it is not guaranteed about its value of the mass production products. 5. In the case of that the Products in this document falls under the foreign exchange and foreign trade control law or other applicable laws and regulations, approval of the export to be based on those laws and regulations are necessary. Customers are requested 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 ND13013-E-01 2013.04