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PI74LPT16543

Fast CMOS 16-Bit Latched Transceivers

Pericom Semiconductor 

PI74LPT16543

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Switching Characteristics over Operating Range(1)

Parameters Description

LPT16543

LPT16543A

LPT16543C

Com.

Com.

Com.

Conditions(2) Min(3)

Max

Min(3)

Max

Min(3)

Max

Unit

tPLH

Propagation Delay

CL = 50 pF 2.5

8.5

2.5

6.5

2.5

5.3

ns

tPHL

Transparent Mode

RL = 500 Ω

xAx to xBx or xBx to xAx

tPLH

Propagation Delay

2.5

12.5 2.5

8.0

2.5

7.0

ns

tPHL

xLEBA to xAx, xLEAB to xBx

tPZH

Output Enable Time

2.0

12.0 2.0

9.0

2.0

8.0

ns

tPZL

xOEBA or xOEAB to xAx or xBx

tPHZ

Output Disable Time(4)

2.0

9.0

2.0

7.5

2.0

6.5

ns

tPLZ

xOEBA or xOEAB to xAx or xBx

tSU

Setup Time HIGH or LOW

3.0

—

2.0

—

2.0

—

ns

xAx or xBx to xLEAB or xLEBA

tH

Hold Time HIGH or LOW

2.0

—

2.0

—

2.0

—

ns

xAx or xBx to xLEAB or xLEBA

tW

xLEAB or xLEBA Pulse Width

5.0

—

5.0

—

5.0

—

ns

LOW

tSK(o)

Output Skew(5)

—

0.5

—

0.5

—

0.5

ns

Notes:

1. Propagation Delays and Enable/Disable times are with Vcc = 3.3V ±0.3V, normal range. For Vcc = 2.7V, extended

range, all Propagation Delays and Enable/Disable times should be degraded by 20%.

2. See test circuit and wave forms.

3. Minimum limits are guaranteed but not tested on Propagation Delays.

4. This parameter is guaranteed but not production tested.

5. Skew between any two outputs, of the same package, switching in the same direction. This parameter is guaranteed

by design.

Capacitance (TA = 25°C, f = 1 MHz)

Parameters(1)

Description

Test Conditions

Typ

CIN

Input Capacitance

VIN = 0V

4.5

COUT

Output Capacitance

VOUT = 0V

5.5

Note:

1. This parameter is determined by device characterization but is not production tested.

Max.

6

8

Units

pF

pF

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

Pericom Semiconductor Corporation

2380 Bering Drive • San Jose, CA 95131 • 1-800-435-2336 • Fax (408) 435-1100 • http://www.pericom.com

5

PS2072A 01/16/97

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