TLC548C, TLC548I, TLC549C, TLC549I

8-BIT ANALOG-TO-DIGITAL CONVERTERS

WITH SERIAL CONTROL

SLAS067C – NOVEMBER 1983 – REVISED SEPTEMBER 1996

6

POST OFFICE BOX 655303

PARAMETER MEASUREMENT INFORMATION

See Note B

0.4 V

2.4 V

tf(bus)

Output

tr(bus)

0.8 V

2.4 V

0.8 V

td

DATA OUT

VOLTAGE WAVEFORMS FOR RISE AND FALL TIMES

VOLTAGE WAVEFORMS FOR DELAY TIME

VCC

3 k

Ω

3 k

Ω

VCC

See Note B

50%

50%

0 V

0 V

tPLZ

I/O CLOCK

VOLTAGE WAVEFORMS FOR ENABLE AND DISABLE TIMES

Output Waveform 1

(see Note C)

tPHZ

VOH

90%

10%

tPZL

0 V

VCC

50%

CS

LOAD CIRCUIT FOR

tPZL AND tPLZ

LOAD CIRCUIT FOR

tPZH AND tPHZ

LOAD CIRCUIT FOR

td, tr, AND tf

See Note B

Output

Under Test

Test

Point

3 k

Ω

1.4 V

Output Waveform 2

(see Note C)

CL

(see Note A)

Output

Under Test

Test

Point

CL

(see Note A)

Output

Under Test

Test

Point

CL

(see Note A)

tPZH

50%

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