Datasheet

  
  
 
SLAS062E − JANUARY 1987 − REVISED NOVEMBER 2008
6
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
PRINCIPLES OF OPERATION
The digital inputs of these devices provide TTL compatibility when operated from a supply voltage of 5V. These
devices can operate with any supply voltage in the range from 5V to 15V; however, input logic levels are not
TTL-compatible above 5V.
DACA Data Latches and Drivers
REFA
AGND
OUTA
RFBA
R
FB
RRR
2R
2R
S8
2R
S3
2R
S2
S1
2R
Figure 1. Simplified Functional Circuit for DACA
R
I
256
OUTA
RFBA
R
FB
C
OUT
I
Ikg
AGND
REFA
Figure 2. TLC7528 Equivalent Circuit, DACA Latch Loaded With 11111111
MODE SELECTION TABLE
DACA/DACB CS WR DACA DACB
L
H
X
X
L
L
H
X
L
L
X
H
Write
Hold
Hold
Hold
Hold
Write
Hold
Hold
L = low level, H = high level, X = don’t care