ADVANCE INFORMATION

PI74LVC3245A

8-Bit Dual Supply Bus Transceiver

with 3-State Outputs

6

P-0.3

08/05/03

PARAMETER MEASUREMENT INFORMATION FOR A TO B PORT

Load Circuit

Voltage Waveforms

Propagation Delay Times

Voltage Waveforms

Enable and Disable Times

Notes:

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.

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

Figure 1. Load Circuit and Voltage Waveforms

500Ω

500

Ω

2xVCCB

Open

GND

S1

From Output

Under Test

CL = 50pF

(See Note A)

500Ω

500Ω

50

Input

0V

B-Port

Output

1.5V

1.5V

2.7V

50% VCCB

50% VCCB

Output

Control

0V

1.5V

1.5V

0V

+0.3V

–0.3V

Output

Waveform 1

(see Note B)

Output

Waveform 2

S1 at GND

(see Note B)

2.7V

Power- Up Considerations

To avoid excessive supply current, bus contention or oscillation during power-up, the following guidelines should be followed:

1. Connect ground first before any supply voltage is applied.

Test

S1

Open

GND