PI74ALVCH16244 Datasheet, PDF (1/5 Pages) Pericom Semiconductor Corporation – 16-Bit Buffer Driver with 3-State Outputs

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16-Bit Buffer Driver
with 3-State Outputs
Features
• Designed for low-voltage operation
• V_CC = 2.3V to 3.6V
• Hysteresis on all inputs
• Typical V_OLP (Output Ground Bounce)
< 0.8V at V_CC = 3.3V, T_A = 25°C
• Typical V_OHV (Output V_OH Undershoot)
< 2.0V at V_CC = 3.3V, T_A = 25°C
• Bus Hold retains last active bus state during 3-State,
eliminating the need for external pullup resistors
• Industrial operation at –40°C to +85°C
• Packaging:
– 48-pin 240-mil wide plastic TSSOP (A)
Description
Pericom Semiconductor’s PI74ALVCH16244 is an non-inverting
16-bit buffer/driver designed for low-voltage 2.3V to 3.6V V_CC
operation.
The buffer/driver is designed specifically to improve both the
performance and density of 3-State memory address drivers, clock
drivers, and bus-oriented receivers and transmitters.
The device can be used as four 4-bit buffers, two 8-bit buffers, or
one 16-bit buffer. It provides non-inverting outputs and symmetri-
cal active-low output-enable (OE) inputs.
To ensure the high-impedance state during power up or power
down, OE should be tied to V_CC through a pullup resistor in which
the minimum value is determined by the current-sinking capability
of the driver.
The PI74ALVCH16244 has “Bus Hold” which retains the data
input’s last state whenever the data input goes to high-impedance
preventing “floating” inputs and eliminating the need for pullup/
down resistors.
Block Diagram
1OE ¹
1A1 ⁴⁷
1A2 ⁴⁶
1A3 ⁴⁴
1A4 ⁴³
2OE ⁴⁸
2A1 ⁴¹
2A2 ⁴⁰
2A3 ³⁸
2A4 ³⁷
2 _1Y1
3 _1Y2
5 _1Y3
6 _1Y4
8 _2Y1
9 _2Y2
11 _2Y3
12
2Y4
3OE ²⁵
3A1 ³⁶
3A2 ³⁵
3A3 ³³
3A4 ³²
4OE ²⁴
4A1 ³⁰
4A2 ²⁹
4A3 ²⁷
4A4 ²⁶
13 _3Y1
14 _3Y2
16 _3Y3
17 _3Y4
19 _4Y1
20
4Y2
22
4Y3
23
4Y4
1
PS8087C 10/05/04