The TC74VCX16821FT is a high-performance CMOS 20-bit

D-type flip-flop. Designed for use in 1.8-V, 2.5-V or 3.3-V systems,

it achieves high-speed operation while maintaining the CMOS

low power dissipation.

It is also designed with overvoltage tolerant inputs and outputs

up to 3.6 V.

The device is byte controlled with each byte functioning

identically, but independent of the other. Control pins can be

shorted together to obtain full 20-bit operation. The following

description applies to each byte. The twenty flip-flops will store

the state of their individual D inputs that meet the setup and

hold time requirements on the LOW-to-HIGH Clock (CK)

transition. When the OE input is high, the outputs are in a high-impedance state. This device is designed to be

used with 3-state memory address drivers, etc.

All inputs are equipped with protection circuits against static discharge.

Features

• Low-voltage operation: VCC = 1.8 to 3.6 V

• High-speed operation : tpd = 3.5 ns (max) (VCC = 3.0 to 3.6 V)

: tpd = 4.4 ns (max) (VCC = 2.3 to 2.7 V)

: tpd = 8.8 ns (max) (VCC = 1.8 V)

• Output current : IOH/IOL = ±24 mA (min) (VCC = 3.0 V)

: IOH/IOL = ±18 mA (min) (VCC = 2.3 V)

: IOH/IOL = ±6 mA (min) (VCC = 1.8 V)

• Latch-up performance: −300 mA

• ESD performance: Machine model ≥ ±200 V

Human body model ≥ ±2000 V

• Package: TSSOP

• 3.6-V tolerant function and power-down protection provided on all inputs and outputs