WF5091A 32kHz output Crystal Oscillator IC with Frequency Adjustment Function 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 Device Package WF5091A Wafer form SEIKO NPC CORPORATION - 1 WF5091A PAD LAYOUT (Unit: m) (950,880) VDD 1 XT 2 XTN INHN 7 Q 3 6 VPP 4 5 VSS Y (0,0) X Chip size: 0.95mm × 0.88mm Wafer thickness: 130 ± 15m PAD size: 85m Chip base: VSS level PIN DESCRIPTION and PAD COORDINATES No. I/O*1 PIN PAD coordinate [m] 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 112.5 332.2 112.5 120.5 837.5 120.5 837.5 332.2 837.5 596.5 4 Input pin controlled output state (Hi-Z output at LOW, 32.768kHz output at HIGH, INHN I (SCLK) OPEN connection prohibit) SCLK (Clock input) pin in serial interface mode 5 VSS - 6 VPP - (-) ground Serial interface enable pin HIGH: serial interface mode (EEPROM read/write), LOW or OPEN: normal mode Pull-down resistor built-in 7 Q I/O (SDATA) *1. I/O: Input / Output pin 32.768kHz output pin SDATA (Data input/output) pin in serial interface mode I: Input pin O: Output pin BLOCK DIAGRAM XT XTN VDD Q INHN VSS C6-0 SCLK Serial interface EEPROM SDATA VPP SEIKO NPC CORPORATION - 2 WF5091A SPECIFICATIONS Absolute Maximum Ratings Vss=0V Parameter Symbol *1 Supply voltage Conditions Rating Unit VDD Between VDD and VSS -0.3 to +6.5 V VPP Between VPP and VSS -0.3 to +22.0 V Input voltage 1 VIN Q pin -0.3 to VDD+0.3 V Input voltage 2*1 VIN2 INHN pin -0.3 to +6.5 V VOUT Q pin -0.3 to VDD+0.3 V IOUT Q pin ±3 mA *1 Program supply voltage *1*2 *1*2 Output voltage *3 Output current *3 Junction temperature Tj - +125 °C EEPROM rewrite cycles*3 NEW - 100 times Storage temperature*4 TSTG - -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 Parameter Symbol Rating Conditions MIN TYP Unit MAX Operating supply voltage VDD Between VDD and VSS*1 1.2 5.5 V Input voltage VIN Input pins VSS VDD V 19.0 20.0 VPPW Program supply voltage VPPR Operating temperature Ta VPP pin, EEPROM write mode Ta=25°C , VDD=3.0 to 3.6V VPP pin, EEPROM read mode Ta=25°C , VDD=3.0 to 3.6V Condensation free V 1.8VDD 7.0 -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. SEIKO NPC CORPORATION - 3 WF5091A Electrical Characteristics DC Characteristics VDD=1.2 to 5.5V, VSS=0V, Ta=-40 to +85°C, CLOUT=15pF unless otherwise noted. Parameter Symbol Rating Conditions MIN Measurement circuit 1, CLOUT=0pF IDD1 INHN=“H”, VDD=3.3V Measurement circuit 1, CLOUT=0pF INHN=“H”, VDD=5.5V Operating current consumption INHN=“H”, VDD=3.3V Measurement circuit 2, CLOUT=15pF INHN=“H”, VDD=5.5V Current consumption in boot function Current consumption in disable function IBOOT IDIS Measurement circuit 1, boot*1 CLOUT=0pF, VDD=3.3V Measurement circuit 1, INHN=Low, VDD=3.3V Measurement circuit 4, IOH=-0.4mA High-level output voltage VOH 1.5V≤VDD≤5.5V Measurement circuit 4, IOH=-0.1mA 1.2V≤VDD<1.5V MAX 1.0 2.0 1.7 3.2 2.7 3.7 4.4 5.9 1.5 2.5 A 0.9 1.5 A A Measurement circuit 2, CLOUT=15pF IDD2 VDD-0.4 V VDD-0.4 Measurement circuit 4, IOL=0.4mA Low-level output voltage VOL 1.5V≤VDD≤5.5V Measurement circuit 4, IOL=0.1mA 1.2V≤VDD<1.5V Measurement circuit 5, INHN pin High-level input voltage 1 VIH1 1.2V≤VDD<1.5V Measurement circuit 5, INHN pin 1.5V≤VDD≤5.5V VIL1 VIH2 Low-level input voltage 2 VIL2 VPP pull-down resistor Rpd V 0.2VDD V Measurement circuit 5, INHN pin VDD=3.0 to 3.6V 0.4 0.7VDD 1.2V≤VDD<1.5V Measurement circuit 5, VPP pin, Ta=25°C V V 0.3VDD 1.5V≤VDD≤5.5V High-level input voltage 2 0.4 0.8VDD Measurement circuit 5, INHN pin Low-level input voltage 1 Unit TYP V 1.8VDD Measurement circuit 5, VPP pin, Ta=25°C 1.3VDD VDD=3.0 to 3.6V 100 V kΩ *1. Boot function operates from oscillation start to 0.5s (tsta+0.5sec) after applying power supply. SEIKO NPC CORPORATION - 4 WF5091A AC Characteristics 1 (Clock Output Characteristics) VDD=1.2 to 5.5V, VSS=0V, Ta=-40 to +85°C, CLOUT=15pF unless otherwise noted. Parameter Symbol Output duty cycle DUTY Output rise time tr Output fall time tf Output enable delay time tOE Output disable delay time tOD Rating Conditions Measurement circuit 2 1.2V≤VDD≤5.5V, Vth=0.5VDD Unit MIN TYP MAX 45 50 55 % 200 ns 200 ns 16 s 16 s Measurement circuit 2 0.2VDD→0.8VDD Measurement circuit 2 0.8VDD→0.2VDD Measurement circuit 3 INHN=“L”→“H” Measurement circuit 3 INHN=“H”→“L” Q 0.8VDD 0.8VDD 0.2VDD 0.2VDD DUTY measurement voltage 0.5VDD TW DUTY=TW /T×100(%) T tr tf Output switching waveform SEIKO NPC CORPORATION - 5 WF5091A AC Characteristics 2 (Serial Interface Characteristics) VDD=3.0 to 3.6V, VSS=0V, Ta=25°C, CLOUT=5pF unless otherwise noted. Parameter Symbol Rating Conditions MIN TYP Unit MAX 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 EEPROM read mode 2 s EEPROM write mode 2 s EEPROM read mode 2 SCLK HIGH-level pulse width tWH SCLK LOW-level pulse width tWL SCLK rise/fall time tRF Write data setup time tDS 1 s Write data hold time tDH 1 s Read data delay time tRD s 0.1VDD-0.9VDD, 0.9VDD-0.1VDD 100 CLOUT=5pF ns s 1 VPPW, VPPR VPP INHN VIL2 tCS tSDS tSS tSH tDS tWH 0.5VDD (SCLK) tDH tWL 0.9VDD tRF Q (SDATA) WRITE 0.5VDD 0.1VDD tRF DATA DATA Q (SDATA) READ DATA DATA tRD Serial interface timing chart Note. EEPROM read/write in serial interface mode is limited to VDD=3.0 to 3.6V. SEIKO NPC CORPORATION - 6 WF5091A FUNCTIONAL DESCRIPTION INHN Function 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 Serial I/F 19～20V VPP INHN (SCLK) Q (SDATA) WE MC D1 D0 X C6 C5 C4 C3 C2 C1 C0 EEPROM write mode Serial I/F 1.8VDD～7V VPP INHN (SCLK) Q (SDATA) WE MC D1 D0 HiZ C6 C5 C4 C3 C2 C1 C0 EEPROM data output EEPROM read mode When VPP input voltage rise above VIH2, 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. SEIKO NPC CORPORATION - 7 WF5091A Serial interface bit description (1)WE, MC Operation mode setup WE MC Operation mode 0 0 EEPROM read mode Note Internal EEPROM data read mode. Used to check EEPROM write status. Internal EEPROM data write mode. 1 0 EEPROM 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 f0 adjustment. CLOSC increments as the code increment every 1LSB. Refer to the following table for a setup. Function Bit Capacitance (pF) “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. SEIKO NPC CORPORATION - 8 WF5091A EEPROM (f0 adjustment) data setting timing chart EEPROM data is read at the following timing inside IC. (1)Start-up EEPROM dataisisreflected reflected inQthe EEPROMsetting setting data in the (output frequency) at the falling edge Fof O(output frequency) at clock the falling edge of start. the the 8195th (about 0.25s) from oscillation 8195th(about 0.25s) clock from oscillation start. *About 0.25s from oscillation start (Q=32.768kHz). *About 0.25s from oscillationstart(Q=32.768kHz). VDD Q CLosc C[6:0] ALL 0 EEPROM data EEPROM data output timing chart (start-up) 32768 clock (2)Normal operation * 1s from oscillation start(Q=32.768kHz). *1s (Q=32.768kHz) Q CLosc C[6:0] EEPROM data EEPROM data EEPROM data Read after every 32768-clock. EEPROM data output timing chart (normal operation) (3)After EEPROM program operation VPP INHN 3 clock Q CLosc C[6:0] EEPROM data EEPROM data After EEPROM read mode CLosc C[6:0] ALL 0 EEPROM data After EEPROM write mode Read on the falling edge of the 3rd clock after INHN=LOW→HIGH. EEPROM data output timing chart (after EEPROM program operation) Power On Clear (POC) Function The WF5091A has a power-on-clear function. tVDD<10ms/V tVDD: Supply voltage rise time to VDD(MIN). Interval of power reapply Interval of power reapply: MIN 1s MIN 1s VDD POC POC="H" : Boot function operates CLOSC settingsdata = ALL 0 L0 EEPROM = AL Interval of power reapply should be more than 1s. SEIKO NPC CORPORATION - 9 WF5091A MEASUREMENT CIRCUITS MEASUREMENT CIRCUIT 1 Measurement Parameter: IDD1, IBOOT, IDIS A IDD VDD Crystal Q XT 0.1μF XTN INHN VSS A B A: IDD1, IBOOT B: IDIS MEASUREMENT CIRCUIT 2 Measurement Parameter: IDD2, DUTY, tr, tf A *AC characteristic monitors Q terminal with an oscilloscope. IDD, IDIS VDD Crystal Q XT 0.1μF XTN INHN VSS CLOUT=15pF (Including probe capacitance) MEASUREMENT CIRCUIT 3 Measurement Parameter: tOE, tOD Signal Generator VDD 0.001μF XT 50Ω Q 0.1μF INHN VSS CLOUT=15pF RL=10kΩ Signal Generator XT input signal:1Vp-p,sine wave tOE: INHN L→H tOD: INHN H→L SEIKO NPC CORPORATION - 10 WF5091A MEASUREMENT CIRCUIT 4 Measurement Parameter: VOH, VOL Signal Generator VDD 0.001μF 2kΩ Q XT 50Ω 0.1μF VSS V VOH VOL 0.1μF VS XT input signal:1Vp-p,sine wave VOH VS ΔV ΔV=VQ-VS VS adjusted so that ΔV=2kΩ×IOH ΔV VS VOL ΔV=VQ-VS VS adjusted so that ΔV=2kΩ×IOL MEASUREMENT CIRCUIT 5 Measurement Parameter: VIH, VIL INHN, Q, VPP *Apply a voltage to input pins to monitor the change in state. VDD Input pins V 0.1μF VSS MEASUREMENT CIRCUIT 6 Measurement Parameter: CLOSC VDD Impedance Analyzer (Agilent4396B etc.) XT 0.1μF XTN VSS SEIKO NPC CORPORATION - 11 WF5091A 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 - 12 WF5091A 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:[email protected] ND13013-E-01 2013.04 SEIKO NPC CORPORATION - 13