Datasheet

TLC548C, TLC548I, TLC549C, TLC549I
8-BIT ANALOG-TO-DIGITAL CONVERTERS
WITH SERIAL CONTROL
SLAS067C – NOVEMBER 1983 – REVISED SEPTEMBER 1996
6
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
PARAMETER MEASUREMENT INFORMATION
See Note B
0.4 V
2.4 V
t
f(bus)
Output
t
r(bus)
0.8 V
2.4 V
0.8 V
t
d
DATA OUT
VOLTAGE WAVEFORMS FOR RISE AND FALL TIMES
VOLTAGE WAVEFORMS FOR DELAY TIME
V
CC
3 kΩ
3 kΩ
V
CC
See Note B
50%
50%
0 V
0 V
t
PLZ
I/O CLOCK
VOLTAGE WAVEFORMS FOR ENABLE AND DISABLE TIMES
Output Waveform 1
(see Note C)
t
PHZ
V
OH
90%
10%
t
PZL
0 V
V
CC
50%
CS
LOAD CIRCUIT FOR
t
PZL
AND t
PLZ
LOAD CIRCUIT FOR
t
PZH
AND t
PHZ
LOAD CIRCUIT FOR
t
d
, t
r
, AND t
f
See Note B
Output
Under Test
Test
Point
3 kΩ
1.4 V
Output Waveform 2
(see Note C)
C
L
(see Note A)
Output
Under Test
Test
Point
C
L
(see Note A)
Output
Under Test
Test
Point
C
L
(see Note A)
t
PZH
50%
NOTES: A. C
L
= 50 pF for TLC548 and 100 pF for TLC549; C
L
includes jig capacitance.
B. t
en
= t
PZH
or t
PZL
, t
dis
= t
PHZ
or t
PLZ
.
C. Waveform 1 is for an output with internal conditions such that the output is low except when disabled by the output control.
Waveform 2 is for an output with internal conditions such that the output is high except when disabled by the output control.
Figure 1. Load Circuits and Voltage Waveforms