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TC7129 Fiches technique(PDF) 4 Page - TelCom Semiconductor, Inc |
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TC7129 Fiches technique(HTML) 4 Page - TelCom Semiconductor, Inc |
4 / 15 page 3-234 TELCOM SEMICONDUCTOR, INC. TC7129 4-1/2 DIGIT ANALOG-TO-DIGITAL CONVERTER WITH ON-CHIP LCD DRIVERS PIN DESCRIPTIONS Pin No. Pin No. Pin No. 40-Pin 44-Pin 44-Pin TC7129CPL TC7129CKW TC7129CLW Symbol Function 1 40 2 OSC1 Input to first clock inverter. 2 41 3 OSC3 Output of second clock inverter. 3 ANNUNCIATOR Backplane square-wave output for driving annunciators. 443 5 B1, C1, CONT Output to display segments. 544 6 A1, G1, D1 Output to display segments. 61 7 F1, E1, DP1 Output to display segments. 72 8 B2, C2, LO BATT Output to display segments. 83 9 A2, G2, D2 Output to display segments. 94 10 F2, E2, DP2 Output to display segments. 10 5 11 B3, C3, MINUS Output to display segments. 11 7 13 A3, G3, D3 Output to display segments. 12 8 14 F3, E3, DP3 Output to display segments. 13 9 15 B4, C4, BC5 Output to display segments. 14 10 16 A4, D4, G4 Output to display segments. 15 11 17 F4, E4, DP4 Output to display segments. 16 12 18 BP3 Backplane #3 output to display. 17 13 19 BP2 Backplane #2 output to display. 18 14 20 BP1 Backplane #1 output to display. 19 15 21 VDISP Negative rail for display drivers. 20 16 22 DP4/OR Input: When HI, turns on most significant decimal point. Output: Pulled HI when result count exceeds ±19,999. 21 18 24 DP3/UR Input: Second most significant decimal point on when HI. Output: Pulled HI when result count is less than ±1000. 22 19 25 LATCH/HOLD Input: When floating, ADC operates in the free-run mode. When pulled HI, the last displayed reading is held. When pulled LO, the result counter contents aren shown inincrementing during the deintegrate phase of cycle. Output: Negative-going edge occurs when the data latches are updated. Can be used for converter status signal. 23 20 26 V– Negative power supply terminal. 24 27 V+ Positive power supply terminal and positive rail for display drivers. 25 21 28 INT IN Input to integrator amplifier. 26 23 29 INT OUT Output of integrator amplifier. 27 24 30 CONTINUITY Input: When LO, continuity flag on the display is OFF. When HI, continuity flag is ON. Output: HI when voltage between inputs is less than +200 mV. LO when voltage between inputs is more than +200 mV. 28 25 31 COMMON Sets common-mode voltage of 3.2V below V+ for DE, 10X, etc. Can be used as preregulator for external reference. 29 26 32 C + REF Positive side of external reference capacitor. 30 27 33 C–REF Negative side of external reference capacitor. 31 29 35 BUFFER Output of buffer amplifier. 32 30 36 IN LO Negative input voltage terminal. 33 31 37 IN HI Positive input voltage terminal. |
Numéro de pièce similaire - TC7129 |
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Description similaire - TC7129 |
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