1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 1 2 3 4 5 6 7 8 9 0 1 2
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 1 2 3 4 5 6 7 8 9 0 1 2
Features
• The PI74VCX family is designed for low voltage operation
• 3.6V I/O Tolerant Inputs and Outputs
• Supports Live Insertion
• Balanced output drive, ±24mA
• Uses patented Noise Reduction Circuitry
• Typical V
• Typical V
• Power-Off High Impedance inputs and outputs
• Industrial operation at –40°C to +85°C
• Packaging (Pb-free & Green available):
Block Diagram
V
< 0.6V at V
< –0.6V at V
– 48-pin 240 mil. wide plastic TSSOP (A)
DD
= 1.8V to 3.6V
06-0202
OLP
OHV
DD
DD
(Output Ground Bounce)
(Output V
= 2.5V, T
= 2.5V, T
1DIR
1A
1A
1A
1A
1A
1
1A
1A
A
5
0
1
2
3
4
6
7
A
A
OH
= 25ºC
= 25ºC
Undershoot)
1OE
1B
1B
1B
1B
1B
1B
1B
1B
0
1
2
3
4
5
6
7
1
Description
Pericom Semiconductor’s PI74VCX16245 is a 16-bit bidirectional
transceiver designed for asynchronous two-way communication
between data buses. The direction control input pin (xDIR)
determines the direction of data flow through the bidirectional
transceiver. The Direction and Output Enable controls are designed
to operate this device as either two independent 8-bit transceivers
or one 16-bit transceiver. The output enable (OE) input, when HIGH,
disables both A and B ports by placing them in HIGH Z condition.
To ensure the high-impedance state during power up or power
down, OE should be tied to V
minimum value of the resistor is determined by the current sinking
ability of the driver.
The PI74VCX family is I/O Tolerant, allowing it to operate in
mixed 1.8V/3.6V systems.
2
2
2
2
2
2
2
2
2
DIR
A
A
A
A
A
A
A
A
0
1
3
5
6
7
8
4
2.5V 16-Bit Bidirectional Transceiver
DD
with 3-State Outputs
through a pull-up resistor; the
PI74VCX16245
2
2
2
2
2
2
2
2
2
OE
B
B
B
B
B
B
B
B
0
1
2
3
4
5
6
7
PS8325C
10/27/06