SN74LV163ANSR

4BIT同步二进制 4BIT SYNCHRONOUS BINARY

description

The ’LV163A devices are 4-bit synchronous binary counters designed for 2-V to 5.5-V VCC operation.

These synchronous, presettable counters feature an internal carry look ahead for application in high-speed counting designs. The ’LV163A devices are 4-bit binary counters. Synchronous operation is provided by having all flip-flops clocked simultaneously so that the outputs change coincident with each other when instructed by the count-enable ENP, ENT inputs and internal gating. This mode of operation eliminates the output counting spikes normally associated with synchronous ripple-clock counters. A buffered clock CLK input triggers the four flip-flops on the rising positive-going edge of the clock waveform.

2-V to 5.5-V VCC Operation

Max tpd of 9.5 ns at 5 V

Typical VOLPOutput Ground Bounce <0.8 V at VCC = 3.3 V, TA= 25°C

Typical VOHVOutput VOHUndershoot >2.3 V at VCC = 3.3 V, TA= 25°C

Support Mixed-Mode Voltage Operation on All Ports

Internal Look Ahead for Fast Counting

Carry Output for n-Bit Cascading

Synchronous Counting

Synchronously Programmable

Ioff Supports Partial-Power-Down Mode Operation

Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II

ESD Protection Exceeds JESD 22

− 2000-V Human-Body Model A114-A

− 200-V Machine Model A115-A

− 1000-V Charged-Device Model C101