
1
PS8696E
06/09/06
Description
Pericom Semiconductor’s PI74AVC+16820A, a 10-bit flip-flop
designed for 1.65V to 3.6V VCC operation. It is designed with
edge-triggered D-type flip-flops. On the positive transition of clock
(CLK) input. The device provides true data at the Q outputs.
A buffered output-enable (OE) input can be used to place the ten
outputs in either a normal logic state (HIGH or LOW level) or
a high-impedance state. In the high-impedance state, the outputs
neitherloadnordrivethebuslinessignificantly.Thehigh-impedance
state and increased drive provide the capacity to drive bus lines
without the need for interface or pullup components.
OE does not affect the internal operation of the flip-flops. Old data
can be retained or new data can be entered while the outputs are in
the high-impedance state.
To ensure the high-impedance state during power-up or power-
down, OE should be tied to VCC through a pullup resistor whose
minimum value is determined by the current sinking capability of
the driver.
2.5V 10-Bit Flip-Flop with
Dual and 3-State Outputs
Features
Designed for low-voltage operation, VCC = 1.65V to 3.6V
True ±24mA Balanced Drive @ 3.3V
IOFF supports Partial power-down operation
3.6V I/O Tolerant inputs and outputs
All outputs contain a patented DDC (Dynamic Drive-
Control) circuit that reduces noise without degrading
propagation delay.
Industrial operation: –40°C to +85°C
Packaging (Pb-free & Green available):
– 56-pin 240-mil wide plastic TSSOP (A)
– 56-pin 173-mil wide plastic TVSOP (K)
PI74AVC+16820A
Pin Configuration
Block Diagram
1OE
2OE
1Q2
C1
1D
CLK
TO 9 OTHER CHANNELS
D1
1Q1
1
28
56
55
2
3
06-0173