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PI74LPT16646

Fast CMOS 3.3V 16-Bit Registered Transceivers

Pericom Semiconductor 

PI74LPT16646

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Switching Characteristics over Operating Range(1)

Parameters Description

Conditions(2)

LPT16646

LPT16646A

LPT16646C

Com.

Com.

Com.

Min(3)

Max

Min(3)

Max

Min(3)

Max

Unit

tPLH

tPHL

tPZH

tPZL

tPHZ

tPLZ

tPLH

tPHL

tPLH

tPHL

tSU

tH

tW

tSK(o)

Propagation Delay

Bus to Bus

Output Enable Time

XDIR or XOE to Bus

Output Disable Time(4)

XDIR or XOE to Bus

Propagation Delay

Clock to Bus

Propagation Delay

xSBA or xSAB to Bus

Setup Time HIGH or

LOW, BUS to Clock

Hold Time HIGH or

LOW, Bus to Clock

Clock Pulse Width(4)

HIGH or LOW

Output Skew(5)

CL = 50 pF

RL = 500 Ω

2.0

9.0

2.0

6.3

1.5

5.4

ns

2.0

14.0 2.0

9.8

1.5

7.8

ns

2.0

9.0

2.0

6.3

1.5

6.3

ns

2.0

9.0

2.0

6.3

1.5

5.7

ns

2.0

11.0 2.0

7.7

1.5

6.2

ns

4.0

—

2.0

—

2.0

—

ns

2.0

—

1.5

—

1.5

—

ns

6.0

—

5.0

—

5.0

—

ns

—

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

Pericom Semiconductor Corporation

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

6

PS2073A 01/16/97

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