SN74LS193MEL 查看數據表（PDF） - ON Semiconductor

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SN74LS193MEL

Presettable 4-Bit Binary Up/down Counter

ON Semiconductor 

SN74LS193

Presettable 4-Bit Binary

Up/Down Counter

The SN74LS193 is an UP/DOWN MODULO-16 Binary Counter.

Separate Count Up and Count Down Clocks are used and the circuits

can operate synchronously. The outputs change state synchronous

with the LOW-to-HIGH transitions on the clock inputs.

Separate Terminal Count Up and Terminal Count Down outputs are

provided which are used as the clocks for a subsequent stages without

extra logic, thus simplifying multistage counter designs. Individual

preset inputs allow the circuits to be used as programmable counters.

Both the Parallel Load (PL) and the Master Reset (MR) inputs

asynchronously override the clocks.

• Low Power . . . 95 mW Typical Dissipation

• High Speed . . . 40 MHz Typical Count Frequency

• Synchronous Counting

• Asynchronous Master Reset and Parallel Load

• Individual Preset Inputs

• Cascading Circuitry Internally Provided

• Input Clamp Diodes Limit High Speed Termination Effects

GUARANTEED OPERATING RANGES

Symbol

Parameter

Min Typ Max Unit

VCC

Supply Voltage

TA

Operating Ambient

Temperature Range

4.75 5.0 5.25

V

0

25

70

°C

IOH

Output Current – High

IOL

Output Current – Low

– 0.4 mA

8.0

mA

http://onsemi.com

LOW

POWER

SCHOTTKY

16

1

PLASTIC

N SUFFIX

CASE 648

16

1

SOIC

D SUFFIX

CASE 751B

ORDERING INFORMATION

Device

Package

Shipping

SN74LS193N 16 Pin DIP 2000 Units/Box

SN74LS193D

16 Pin

2500/Tape & Reel

© Semiconductor Components Industries, LLC, 1999

1

December, 1999 – Rev. 0

Publication Order Number:

SN74LS193/D

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