54ACT16241, 74ACT16241

16-BIT BUFFERS/DRIVERS

WITH 3-STATE OUTPUTS

SCAS189A – MARCH 1990 – REVISED APRIL 1996

5

POST OFFICE BOX 655303

switching characteristics over recommended operating free-air temperature range,

PARAMETER

FROM

TO

TA = 25°C

54ACT16241

74ACT16241

UNIT

PARAMETER

(INPUT)

(OUTPUT)

MIN

TYP

MAX

MIN

MAX

MIN

MAX

UNIT

tPLH

A

Y

3.3

6.5

8.4

3.3

9.5

3.3

9.5

ns

tPHL

A

Y

2.3

6.3

8.2

2.3

9.1

2.3

9.1

ns

tPZH

OE or OE

Y

2.3

6.5

8.3

2.3

9.4

2.3

9.4

ns

tPZL

OE or OE

Y

2.9

7.3

9.3

2.9

10.5

2.9

10.5

ns

tPHZ

OE or OE

Y

4.3

8.9

10.6

4.3

11.6

4.3

11.6

ns

tPLZ

OE or OE

Y

4

8.1

9.8

4

10.7

4

10.7

ns

PARAMETER

TEST CONDITIONS

TYP

UNIT

C d

Power dissipation capacitance

Outputs enabled

CL =50 pF

f=1MHz

43

pF

Cpd

Power dissipation capacitance

Outputs disabled

CL = 50 pF,

f = 1 MHz

10

pF

PARAMETER MEASUREMENT INFORMATION

From Output

Under Test

CL = 50 pF

(see Note A)

LOAD CIRCUIT

S1

2

× VCC

500

Ω

500

Ω

tPLH

tPHL

Output

Control

(low-level

enabling)

Output

Waveform 1

S1 at 2

× VCC

(see Note B)

Output

Waveform 2

S1 at GND

(see Note B)

VOL

VOH

tPZL

tPZH

tPLZ

tPHZ

1.5 V

1.5 V

1.5 V

1.5 V

[ VCC

3 V

0 V

50% VCC

50% VCC

VOH

VOL

0 V

50% VCC

20% VCC

50% VCC

80% VCC

[ 0 V

3 V

GND

Open

Input

Output

VOLTAGE WAVEFORMS

VOLTAGE WAVEFORMS

tPLH/tPHL

tPLZ/tPZL

tPHZ/tPZH

Open

2

× VCC

GND

TEST

S1

NOTES: A. CL includes probe and jig capacitance.

B. 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.

C. All input pulses are supplied by generators having the following characteristics: PRR

≤ 1 MHz, ZO = 50 Ω, tr = 3 ns, tf = 3 ns.

D. The outputs are measured one at a time with one input transition per measurement.

Figure 1. Load Circuit and Voltage Waveforms

PRODUCT PREVIEW information concerns products in the formative or

design phase of development. Characteristic data and other

specifications are design goals. Texas Instruments reserves the right to

change or discontinue these products without notice.