TC7109C View Datasheet(PDF) - TelCom Semiconductor Inc => Microchip
Part Name
Description
MFG CO.
'TC7109C' PDF : 21 Pages View PDF
TC7109
TC7109A
12-BIT µP-COMPATIBLE
ANALOG-TO-DIGITAL CONVERTERS
Direct interfacing to most microprocessor busses is
easily accomplished through the three-state output of the
TC7109A.
Figures 1, 17 and 18 are typical connection diagrams.
To ensure requirements for setup and hold times, minimum
pulse widths, and the drive limitations on long busses are
met, it is necessary to carefully consider the system timing
in this type of interface. This type of interface is used when
the memory peripheral address density is low, providing
simple address decoding. Interrupt handling can be simpli-
fied by using an interface to reduce the component count.
A. GND
B. GND
CHIP SELECT 1
C. GND
CHIP SELECT
MODE CE/LOAD
B9–B12
POL, OR
6
MODE CE/LOAD
B1–B12
POL, OR
14
MODE CE/LOAD
B9–B12
POL, OR
6
ANALOG
IN
TC7109A
B1–B8 8
RUN/HOLD
HBEN
CONVERT
LBEN
ANALOG
IN
TC7109A
HBEN
RUN/HOLD
LBEN
ANALOG
IN
CONVERT
TC7109A
B1–B8 8
RUN/HOLD
HBEN
CONVERT
LBEN
CONTROL
GND OR
CHIP SELECT 2
BYTE FLAGS
Figure 12. Direct Mode Chip and Byte Enable Combinations
CONVERTER
SELECT
CONVERTER
SELECT
CONVERTER
SELECT
GND
GND
GND
MODE CE/LOAD
B9–B12
POL, OR
6
MODE CE/LOAD
B9–B12
POL, OR
6
MODE CE/LOAD
B9–B12
POL, OR
6
ANALOG
IN
TC7109A
B1–B8
RUN/HOLD
HBEN
LBEN
TC7109A
8
ANALOG
IN
+5V
B1–B8
RUN/HOLD
HBEN
LBEN
TC7109A
8
ANALOG
IN
+5V
B1–B8
RUN/HOLD
HBEN
LBEN
8
+5V
BYTE SELECT FLAGS
Figure 13. Three-Stating Several TC7109A's to a Small Bus
3-106
TELCOM SEMICONDUCTOR, INC.
Share Link: 
