SN74LS109ANE4中文资料德州仪器数据手册PDF规格书

Package Options Include Plastic “Small

Outline’ Packages, Ceramic Chip Carriers

and Flat Packages, and Plastic and Ceramic

DIPs

Dependable Texas Instruments Quality and

Reliability

description

These devices contain two independent J-K positive-

edge triggered flip-flops. A low level at the preset or

‘clear inputs sets or resets the outputs regardless of the

levels of the other inputs. When preset and clear are in-

active (high), data at the J and K inputs meeting the

setup time requirements are transferred to the outputs

on the positive-going edge of the clock pulse. Clock

triggering occurs at a voltage level and is not directly

related to the rise time of the clock pulse. Following the

hold time interval, data ar the J and K inputs may be

changed without affecting the levels at the outputs.

These versatile flip-flops can perform as toggle flip-flops

by grounding K and tying J high. They also can perform

23 D-type flip-flops if J and K are tied together.

The SN54109 and SNSALS109A are characterized for

operation over the full military temperature range of

—55°C 10 125°C. The SN74109 and SN74LS109A are

characterized for operation from 0°C to 70°C,