TLC548C, TLC548I, TLC549C, TLC549I
8-BIT ANALOG-TO-DIGITAL CONVERTERS
WITH SERIAL CONTROL
SLAS067C – NOVEMBER 1983 – REVISED SEPTEMBER 1996
PARAMETER MEASUREMENT INFORMATION
1.4 V
VCC
3 kΩ
Output
Under Test
CL
(see Note A)
See Note B
LOAD CIRCUIT FOR
td, tr, AND tf
Test
Point
3 kΩ
Output
Under Test
CL
(see Note A)
3 kΩ
Test
Point
Output
Under Test
CL
(see Note A)
Test
Point
See Note B
LOAD CIRCUIT FOR
tPZH AND tPHZ
LOAD CIRCUIT FOR
tPZL AND tPLZ
VCC
CS
50%
50%
0V
tPZL
Output Waveform 1
(see Note C)
tPZH
50%
10%
tPHZ
50%
See Note B
VOLTAGE WAVEFORMS FOR ENABLE AND DISABLE TIMES
90%
VOH
0V
0V
tPLZ
VCC
Output Waveform 2
(see Note C)
I/O CLOCK
td
DATA OUT
0.8 V
Output
2.4 V
0.4 V
2.4 V
0.8 V
tr(bus)
tf(bus)
VOLTAGE WAVEFORMS FOR RISE AND FALL TIMES
VOLTAGE WAVEFORMS FOR DELAY TIME
NOTES: A. CL = 50 pF for TLC548 and 100 pF for TLC549; CL includes jig capacitance.
B. ten = tPZH or tPZL, tdis = tPHZ or tPLZ.
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
6
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DALLAS, TEXAS 75265