74LCX16821 Low Voltage 20-Bit D-Type Flip-Flop with 5V Tolerant Inputs and Outputs
January 1996
Revised April 1999
74LCX16821
Low Voltage 20-Bit D-Type Flip-Flop with 5V Tolerant
Inputs and Outputs
General Description
The LCX16821 contains twenty non-inverting D-type flip-
flops with 3-STATE outputs and is intended for bus oriented
applications. The device is designed for low voltage (2.5V
or 3.3V) V
CC
applications with capability of interfacing to a
5V signal environment.
The LCX16821 is fabricated with an advanced CMOS tech-
nology to achieve high speed operation while maintaining
CMOS low power dissipation.
Features
s
5V tolerant inputs and outputs
s
2.3V鈥?.6V V
CC
specifications provided
s
6.2 ns t
PD
max (V
CC
=
3.3V), 20
碌A(chǔ)
I
CC
max
s
Power down high impedance inputs and outputs
s
Supports live insertion/withdrawal (Note 1)
s
鹵24
mA output drive (V
CC
=
3.0V)
s
Implements patented noise/EMI reduction circuitry
s
Latch-up performance exceeds 500 mA
s
ESD performance:
Human body model
>
2000V
Machine model
>
200V
Note 1:
To ensure the high-impedance state during power up or down, OE
should be tied to V
CC
through a pull-up resistor: the minimum value or the
resistor is determined by the current-sourcing capability of the driver.
Ordering Code:
Order Number
74LCX16821MEA
74LCX16821MTD
Package Number
MS56A
MTD56
Package Description
56-Lead Shrink Small Outline Package (SSOP), JEDEC MO-118, 0.300鈥?Wide
56-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 6.1mm Wide
Devices also available in Tape and Reel. Specify by appending suffix letter 鈥淴鈥?to the ordering code.
Logic Symbol
Pin Descriptions
Pin Names
OE
n
CLK
n
D
0
鈥揇
19
O
0
鈥揙
19
Description
Output Enable Input (Active LOW)
Clock Input
Inputs
Outputs
漏 1999 Fairchild Semiconductor Corporation
DS012634.prf
www.fairchildsemi.com