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| JT9648-AS TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic JT9648-AS Liquid Crystal Display Body Thermometer LSI The JT9648-AS is a single chip CMOS LSI for electrical body thermometer capable of directly driving a 4-1/2 digit liquid crystal using a thermistor as a body heat sensor. Features * * * * * * * * * * * * * * Display temperature range: 32.00C to 43.00C (90.00 to 110.00F) Resolution: 0.01C (0.01F) Accuracy: 0.1C (35.0C~38.0C, VSS1 = -1.55 V~-1.40 V, Ta = 25C) Max value holding function Memorize last value Voltage drop detecting function Measured temperature stable detecting function Power ON/OFF operation by a single switch Automatic power OFF function (approx. 16 min) Full display function A single 1.5 V silver oxide battery 4-1/2 digit, 1/3 duty, 1/2 bias liquid crystal direct driving Buzzer output (time elapsed or stable detection reporting) C/F measurements selectable by bonding option Block Diagram 1 2003-02-06 JT9648-AS Pin Description Pin Name Power Pin Oscillator Pin SW Pin Function selectional Pin Test Pin Display Pin Buzzer Pin Doubler Pin BLD Pin Symbol VDD, VSS1, VSS2, VREG1, VREG2, PULL RS, RX, CIN, RI, RO SW FAH, TM, BT, TIME TE1, TS1, TS2, TS3, THRU, FOUT COM1, COM2, COM3, SEG1~11 BUZZ, BUZZ FAI1, FAI2 BLD No. of Pins 6 5 1 4 6 14 2 2 1 Pad Layout 2 2003-02-06 JT9648-AS Pad Location Table Pin Name RX RS CIN TE1 TS3 TS2 TS1 THRU FOUT VREG2 BUZZ (m) X Point -1222 -1222 -1222 -1222 -1222 -1222 -1222 -1222 -1222 -819 -639 -459 -279 -99 81 261 441 621 801 1222 1222 Y Point -1069 -578 -398 -218 -38 142 322 502 682 1069 1069 1069 1069 1069 1069 1069 1069 1069 1069 996 816 Pin Name RI RO SW PULL VSS1 COM3 COM2 COM1 S11 S10 S9 S8 S7 S6 S5 S4 S3 S2 S1 VREG1 X Point 1222 1222 1222 1222 1222 1222 1222 1222 1150 970 790 610 430 250 70 -110 -290 -470 -650 -830 Y Point 636 456 276 96 -84 -264 -444 -624 -1069 -1069 -1069 -1069 -1069 -1069 -1069 -1069 -1069 -1069 -1069 -1069 BUZZ BLD VDD FAI1 FAI2 VSS2 TIME TM FAH BT 3 2003-02-06 JT9648-AS Functional Specifications 1. Display Configuration Pad Name S1 S2 S3 S4 S5 S6 COM1 2B 2C 2A 2D 3F 3A 3B 4F COM2 2E 2G 3E 3G 3C 4E COM3 1B 1C 2F Pad Name S7 S8 S9 COM1 4A 4B 5F 5A 5B COM2 4G 4C 5E 5G 5C COM3 4D C BAT 5D DEG 3D P F S10 S11 2. Liquid Crystal Drive Waveform 4 2003-02-06 JT9648-AS Display 1. Switch Operation (in case of the elapsed time informing function, unit: C) 5 2003-02-06 JT9648-AS 2. Switch Operation (in case of the elapsed time informing function, unit: F) 6 2003-02-06 JT9648-AS 3. Switch Operation (stable detection informing function, unit: C) 7 2003-02-06 JT9648-AS 4. Switch Operation (stable detection informing function, unit: F) 8 2003-02-06 JT9648-AS 5. Full Display and BZ Demonstration When power SW is on the display keep the FULL DISPLAY and after 1~2 s BZ is out during SW holding, as follows. 6. Memorized Last Data Display After full display (releasing SW), the display show the memorized last data and at the same time TEMP oscillation circuit is tested. If the measuring is error, the display show ERROR DISPLAY. 7. Low Temp Display When measured TEMP is below 32C (90F), all digits are off and only UNIT (C/F) is on. 8. High Temp Display When measured TEMP is over 43C (110F), all digits are off and only UNIT (C/F) is on. 9. Stable Detection Display In case of the stable detection informing system, the C or F mark is flashing during the temperature measurement. The stable detection is performed by checking the 0.1~10 digits for C (0.1~100 digits for F). If the 0.1~10 digits (0.1~100 digits for F) do not change for 16 s (8 s for F), it is judged that temperature is stable and the flashing is stopped, and the C or F mark is kept on to inform the stable. The stable display is held even when a value of measured temperature dropped. If, however, temperature rises again and the 0.1~10 digits (0.1~100 digits for F) changed after stable detection, the C or F mark starts to flash again. 10. Voltage Drop Detection Display If battery voltage drops, a display is made to inform the time to exchange the battery. When voltage drop is detected, "BAT" mark is only displayed, but the others are disappeared. The indicating is kept till power off. Voltage is detected when SW is pushed and every one minute after power on. Selection of Function 1. Selection of Elapsed Time Informing/Stable Detection Informing Functions The elapsed time informing/stable detection informing function is selectable by the BT pin. OPEN or VSS1: Time informing function (1 min, 2 min, 3 min, 5 min) BT VDD: Stable detection informing function 2. Selection of C/F Measurement C/F measurement is selectable by the FAH pin. VSS1 or OPEN: C FAH VDD: F 9 2003-02-06 JT9648-AS 3. Selection of Auto Power Off Function Auto power off function can be set by TM and TIME pin. TM VSS1 or OPEN VDD TIME VSS1 or OPEN VDD AUTO POWER OFF AFTER 16 min (from power ON) AUTO POWER OFF AFTER 64 min (from power ON) NO AUTO POWER OFF FUNCTION "" Don't care Time Informing Function 1. In Case of The Elapsed Time Informing System In order to inform time elapsed after power ON, when 1, 2, 3, and 5 minutes have elapsed after times are informed by the buzzer sounding. The buzzer waveforms are shown below. 10 2003-02-06 JT9648-AS 2. In Case of The Stable Detection Informing System When temperature is judged as the stable, the buzzer sounds for 4 s. to inform. Even when temperature rises thereafter and stable temperature is detected again, the buzzer does not sound. The buzzer waveforms in this system are shown below. Input Pins 1. SW Pin The SW pin has a built-in pull-down resistor and the power supply is repeatedly turned ON/OFF whenever the SW pin is connected to VDD. In this case, in order to prevent malfunction, the chattering of this switch must satisfy the following requirements: 2. Function Selecting Pins There are 3 function selecting pins; FAH, TM, TIME and BT pins, which select respective functions. (refer to SELECTION OF FUNCTION) Each of these 3 pins has a built-in pull-down resistor. 3. Test Pins There are 5 test pins; TE1, TS1, TS2, TS3 and THRU pins. Each of these 5 pins has a built-in pull-down resistor. For the functions of these test pins, refer to TEST FUNCTIONS, CALIBRATION METHODS. 11 2003-02-06 JT9648-AS Test Functions 1. All Clear Function Connection of the TE1 pin to VDD clears all system. After cleared, the mode is POWER OFF. 2. Max Value Holding Stop Function When connect THRU to VDD, the display show the measured temperature every time. Max doesnot be held. = VSS1 or OPEN: Max value holding function Available THRU = VDD: Not available 3. Output Pin Selecting Function TE1 1 1 1 1 SW 1 1 1 1 TS2 0 0 1 1 TS3 0 1 0 1 BLD CONDITION RS OSCILLATION CLOCK RX OSCILLATION CLOCK SYSTEM OSCILLATION CLOCK FOUT Calibration Methods Method 1 (1) With a Body Thermometer Immersed in a Water Tank (always maintain water temperature at 36.00C), Connect the THRU Pin to VDD. Adjust RS Until the Display on the Body Thermometer Becomes 36.00C. Method 2 (1) With a Body Thermometer Immersed in a Water Tank (always maintain water temperature at 36.00C), Connect the TE1, TS3 and SW Pin to VDD, Set a Frequency Counter and Then, Measure Frequency at the FOUT Pin. (f36x) Connect the TE1, TS2 and SW Pins to VDD. Measure Frequency at the FOUT Pin. (f36s) Adjust RS Until Frequency f36s and Frequency f36x Become Same with Each Other. (2) 12 2003-02-06 JT9648-AS Method 1 Method 2 Example of Using Thermister Thermistor VENDOR RESISTANCE 61.56 k (32C) RESISTANCE 52.10 k (36C) RESISTANCE 39.24 k (43C) B-VALUE RS R1 R2 C RO 3953 1% (B30/45) 22.12 k~23.23 k 40.15 k 10 k 700 pF 150 k 2% 3953 1% (B30/45) 11.83 k~12.42 k 19.81 k 3.5 k 1100 pF 150 k 2% 23.55 k 31.26 k 36.94 k 833ET ISHIZUKA ELECTRONICS 503ET ISHIZUKA ELECTRONICS 13 2003-02-06 JT9648-AS Maximum Ratings (Ta = 25C) Characteristics Supply voltage (1) Supply voltage (2) Operating temperature Storage temperature Symbol VSS1-VDD VSS2-VDD Topr Tstg Rating -3.0~0.2 -6.0~0.2 0~50 -40~125 Unit V V C C (unless otherwise specified, VDD = 0 V, VSS1 = -1.55 V, VSS2 = -3.00 V, fo = 64.0 kHz, Ta = 25C) Characteristics VSS1 operating voltage VSS2 operating voltage Full consumption current (1) Symbol VSS1 VSS2 ISUP1 ISUP2 VUCO Co fo fxs Rj IIH1 IIL1 IIL2 IIH3 IIL3 3 (FAH, THRU, TM, BT, TIME) IIL4 3 3 Test Circuit 2 2 1 Test Condition FAH, TM = OPEN Power ON, no load 1 1 1 1 1 3 FAH, TM = OPEN Power OFF, no load RL = 2 M RO = 140 k Co = built-in RX = RS = 53.9 k C = 300 pF 1 detected voltage 1.30 V VIH1 = 0.00 V VIL1 = -1.55 V VIL2 = -1.25 V POWER ON VIH = 0 V VIL = -1.55 V Power ON state VIL4 = -1.25 V Power OFF state Input current (5) (FAH, THRU, TM, BT, TIME) IIL5 Output current (1) (segment) Output current (2) (COM VSS2) Output current (3) (COM VSS1) IOH1 IOL1 IOH2 IOL2 IOH3 IOL3 3 3 IIH5 3 VIH5 = -0.00 V Power OFF state VIL5 = -1.55 V 3 VOH1 = -0.3 V VOL1 = -2.7 V VOH2 = -0.3 V VOL2 = -2.7 V VOH3 = -1.75 V VOL3 = -1.35 V 0.4 Min 1.25 2.00 Typ. 1.55 3.00 Max 2.00 4.00 50 Unit V V A Electrical Characteristicse Full consumption current (2) Doubler output voltage Built-in capacitance Oscillation frequency (1) Oscillation frequency (2) Detecting resistor range Input current (1) (SW, TE1, TS1, 2, 3) Input current (2) (SW, TE1, TS1, 2, 3) Input current (3) (FAH, THRU, TM, BT, TIME) Input current (4) 2.90 200 1.0 -0.1 50 0.04 -0.1 30 64 25 0.20 1700 10.0 250 0.28 A V pF kHz kHz k A A A A 8.0 0.1 A -0.1 4.00 60.0 60.0 -4.00 -60.0 -60.0 A A A 14 2003-02-06 JT9648-AS Characteristics Symbol IOH4 3 (BZ, BZ ) IOL4 Output current (5) (FOUT) IOH5 IOL5 VOL4 = -0.75 V 3 VOH5 = -0.2 V VOL5 = -1.35 V Test Circuit VOH4 = -0.5 V Test Condition VSS2 = -2.5 V VSS1 = -1.25 V VSS2 = -2.5 V VSS1 = -1.25 V Min Typ. Max -200 A 200 30.0 -30.0 Unit Output current (4) A Test Circuit 1. C = 300 pF R1 = R2 = 56 k R3 = 150 k RL = 2 M 2. C = 300 pF R1 = R2 = 56 k R3 = 150 k 15 2003-02-06 JT9648-AS 3. Application Circuit It is desirable to use C, R1, R2 and RS having the satisfactory temperature characteristic. It is desirable to minimize the range of variable resistance of R2 and RS could as possible. 16 2003-02-06 JT9648-AS RESTRICTIONS ON PRODUCT USE 000707EBA * TOSHIBA is continually working to improve the quality and reliability of its products. Nevertheless, semiconductor devices in general can malfunction or fail due to their inherent electrical sensitivity and vulnerability to physical stress. It is the responsibility of the buyer, when utilizing TOSHIBA products, to comply with the standards of safety in making a safe design for the entire system, and to avoid situations in which a malfunction or failure of such TOSHIBA products could cause loss of human life, bodily injury or damage to property. In developing your designs, please ensure that TOSHIBA products are used within specified operating ranges as set forth in the most recent TOSHIBA products specifications. Also, please keep in mind the precautions and conditions set forth in the "Handling Guide for Semiconductor Devices," or "TOSHIBA Semiconductor Reliability Handbook" etc.. * The TOSHIBA products listed in this document are intended for usage in general electronics applications (computer, personal equipment, office equipment, measuring equipment, industrial robotics, domestic appliances, etc.). These TOSHIBA products are neither intended nor warranted for usage in equipment that requires extraordinarily high quality and/or reliability or a malfunction or failure of which may cause loss of human life or bodily injury ("Unintended Usage"). Unintended Usage include atomic energy control instruments, airplane or spaceship instruments, transportation instruments, traffic signal instruments, combustion control instruments, medical instruments, all types of safety devices, etc.. Unintended Usage of TOSHIBA products listed in this document shall be made at the customer's own risk. * The products described in this document are subject to the foreign exchange and foreign trade laws. * The information contained herein is presented only as a guide for the applications of our products. No responsibility is assumed by TOSHIBA CORPORATION for any infringements of intellectual property or other rights of the third parties which may result from its use. No license is granted by implication or otherwise under any intellectual property or other rights of TOSHIBA CORPORATION or others. * The information contained herein is subject to change without notice. 17 2003-02-06 |
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