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TC7109CLW Datasheet(PDF) 6 Page - TelCom Semiconductor, Inc |
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TC7109CLW Datasheet(HTML) 6 Page - TelCom Semiconductor, Inc |
6 / 21 page 3-96 TELCOM SEMICONDUCTOR, INC. TC7109 TC7109A 12-BIT µP-COMPATIBLE ANALOG-TO-DIGITAL CONVERTERS TC7109/A PIN DESCRIPTION (Cont.) 40-Pin PDIP Pin Number Symbol Description 27 SEND Input — Used in handshake mode to indicate ability of an external device to accept data. Connect to V+ if not used. 28 V– Analog Negative Supply — Nominally –5V with respect to GND (Pin 1). 29 REF OUT Reference Voltage Output — Nominally 2.8V down from V+ (Pin 40). 30 BUFFER Buffer Amplifier Output 31 AUTO-ZERO Auto-Zero Node — Inside foil of CAZ. 32 INTEGRATOR Integrator Output — Outside foil of CINT. 33 COMMON Analog Common — System is auto-zeroed to COMMON. 34 INPUT LOW Differential Input Low Side 35 INPUT HIGH Differential Input High Side 36 REF IN + Differential Reference Input Positive 37 REF CAP + Reference Capacitor Positive 38 REF CAP – Reference Capacitor Negative 39 REF IN – Differential Reference Input Negative 40 V+ Positive Supply Voltage — Nominally +5V with respect to GND (Pin 1). NOTE: All digital levels are positive true. Figure 1. TC7109A UART Interface (Send Any Word to UART to Transmit Latest Result) + 1 25 2 19 17 18 21 20 27 GND BUFF OSC OUT STATUS HBEN B1–B8 TEST LBEN MODE CE/LOAD SEND V 40 39 38 37 36 35 34 33 32 31 30 29 28 26 24 23 22 TC7109A CLK Q11 RESET 1 2 3 4 5–12 13 14 15 16 V OSC CONTROL GND RRD RBR1–8 PE FE OE SFD RR1 TRO TRC OSC IN EPE CLS1 CLS2 SBS PI CRL *TBR1–8 TRE DRR DR TBRL TBRE MR 40 17 39 38 37 36 35 34 24 18 19 23 22 21 6403 CMOS UART +5V GND +5V GND 25 SERIAL INPUT 20 SERIAL OUTPUT 15 10 11 GND GND +5V +5V GND +5V –5V +5V OR OPEN GND 3.58MHz CRYSTAL ANALOG GND EXTERNAL REFERENCE + + – INPUT C 0.33 µF AZ C 0.15 µF INT 0.01 µF 1M Ω 1 µF 6 8 3–8 9–16 B9–B12, POL, OR 26–33 For lowest power consumption, TBR1–TBR8 inputs should have 100k Ω pull-up resistors to +5V. RINT 20k 100k Ω Ω 0.2V 1V CD4040B REF IN – REF CAP – REF CAP + REF IN + IN HI IN LO COM INT AZ REF OUT BUFF V – RUN/HOLD OSC SEL OSC OUT OSC IN REF REF 8 – *NOTE: |
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