TC7109 View Datasheet(PDF) - TelCom Semiconductor Inc => Microchip
Part Name
Description
Manufacturer
TC7109 Datasheet PDF : 21 Pages
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12-BIT µP-COMPATIBLE
ANALOG-TO-DIGITAL CONVERTERS
1
TC7109
TC7109A
TC7109/A PIN DESCRIPTION
40-Pin PDIP
Pin Number
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
Symbol
GND
STATUS
POL
OR
B12
B11
B10
B9
B8
B7
B6
B5
B4
B3
B2
B1
TEST
LBEN
19
HBEN
20
CE/LOAD
21
MODE
22
OSC IN
23
OSC OUT
24
OSC SEL
25
BUF OSC OUT
26
RUN/HOLD
TELCOM SEMICONDUCTOR, INC.
Description
Digital ground, 0V, ground return for all digital logic.
Output HIGH during integrate and deintegrate until data is latched. Output LOW
when analog section is in auto-zero or zero-integrator configuration.
Polarity — High for positive input.
Overrange — High if overranged.
Bit 12 (Most Significant Bit)
Bit 11
Bit 10
Bit 9
Bit 8
All Three-State Data Bits
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1 (Least Significant Bit)
Input High — Normal operation. Input LOW — Forces all bit outputs HIGH.
Note: This input is used for test purposes only.
Low-Byte Enable — With MODE (Pin 21) LOW, and CE/LOAD (Pin 20) LOW,
taking this pin LOW activates low-order byte outputs, B1–B8. With MODE (Pin 21)
HIGH, this pin serves as low-byte flag output used in handshake mode. See
Figures 7, 8, and 9.
High-Byte Enable — With MODE (Pin 21) LOW, and CE/LOAD (Pin 20) LOW,
taking this pin LOW activates high-order byte outputs, B9–B12, POL, OR. With
MODE (Pin 21) HIGH, this pin serves as high-byte flag output used in handshake
mode. See Figures 7, 8, and 9.
Chip Enable/Load — With MODE (Pin 21) LOW, CE/LOAD serves as a master
output enable. When HIGH, B1–B12, POL, OR outputs are disabled. When
MODE (Pin 21) is HIGH, a load strobe is used in handshake mode. See Figure 7,
8, and 9.
Input LOW — Direct output mode where CE/LOAD (Pin 20), HBEN (Pin 19), and
LBEN (Pin 18) act as inputs directly controlling byte outputs.
Input Pulsed HIGH — Causes immediate entry into handshake mode and output
of data as in Figure 9.
Input HIGH — Enables CE/LOAD (Pin 20), HBEN (Pin 19), and LBEN (Pin 18)
as outputs, handshake mode will be entered and data output as in Figures 7 and
8 at conversions completion.
Oscillator Input
Oscillator Output
Oscillator Select — Input HIGH configures OSC IN, OSC OUT, BUF OSC OUT as
RC oscillator — clock will be same phase and duty cycle as BUF OSC OUT. Input
LOW configures OSC IN, OSC OUT for crystal oscillator — clock frequency will
be 1/58 of frequency at BUF OSC OUT.
Buffered Oscillator Output
Input HIGH — Conversions continuously performed every 8192 clock pulses.
Input LOW — Conversion in progress completed; converter will stop in auto-zero
seven counts before integrate.
2
3
4
5
6
7
8
3-95
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