PI74LVC4245A datasheet(7/9 Pages) PERICOM

7 / 9 page

PI74LVC4245A

8-Bit Dual Supply Bus Transceiver

with 3-State Outputs

P-0.2

08/11/03

ADVANCE INFORMATION

Load Circuit

Voltage Waveforms

Propagation Delay Times

Voltage Waveforms

Enable and Disable Times

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 impulses are supplied by generators having the following characteristics: PRR ≤ 10 MHz, ZO = 50Ω, tR ≤ 2.5ns, tF ≤ 2.5ns.

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

Figure 2. Load Circuit and Voltage Waveforms

500Ω

500

Ω

Open

GND

From Output

Under Test

CL = 50pF

(See Note A)

Input

tPLH

tPHL

Output

VOH

VOL

1.5V

tPZL

Output

Control

1.5V

tPLZ

tPHZ

VOL

3.5V

tPZH

+0.3V

–0.3V

Output

Waveform 1

S1 at 7V

(see Note B)

Output

Waveform 2

S1 at GND

(see Note B)

VOH

VOL

1.5V

PARAMETER MEASUREMENT INFORMATION FOR A TO B PORT

VCCA = 4.5V to 5.5V and VCCB = 2.7V to 3.6V

Test

tPLH/tPHL

tPLZ/tPZL

tPHZ/tPZH

Open

GND

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