UT54ACTS220 datasheet(1/12 Pages) AEROFLEX

Nome de Peças	UT54ACTS220

Descrição Electrónicos	Clock and Wait-State Generation Circuit

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Standard Products

UT54ACTS220

Clock and Wait-State Generation Circuit

Datasheet

November 2010

www.aeroflex.com/logic

FEATURES

1.2μ CMOS

- Latchup immune

High speed

Low power consumption

Single 5 volt supply

Available QML Q or V processes

Flexible package

- 14-pin DIP

- 14-lead flatpack

UT54ACTS220 - SMD 5962-96753

DESCRIPTION

The UT54ACTS220 is designed to be a companion chip to

UTMC’s UT69151 S

μMMIT family for the purpose of gener-

ating clock and wait-state signals. The device contains a divide

by two circuit that accepts TTL input levels and drives CMOS

output buffers. The chip accepts a 48MHz clock and generates

a 24MHz clock. The 48MHz clock can have a duty cycle that

varies by

± 20%. The UT54ACT220 generates a 24MHz clock

with a

± 5% duty cycle variation. The wait-state circuit generates

a single wait-state by delaying the falling edge of DTACK into

the S

μMMIT. The clock/timing device generates DTACK from

the falling edge of input RCS which is synchronized by the fall-

ing edge of 24MHz. The S

μMMIT drives inputs RCS and

DMACK.

The devices are characterized over full military temperature

range of -55

°C to +125°C.

LOGIC SYMBOL

PINOUTS

14-Pin DIP

Top View

14-Lead Flatpack

Top View

(10)

MRST

(8)

DMACK

(6)

48MHz

(9)

RCS

(13)

24MHz

(11)

(12)

DTACK

(4)

CLKIN

(2)

CLKOUT

(3)

CLKOUT

S

CTR1

SRG2

1D

S

TEST

Note:

1. Logic symbol in accordance with ANSI/IEEE Std 91-1984 and IEC

Publication 617-12.

114

213

312

411

510

69

78

NC

CLKOUT

CLKIN

NC

48MHz

VSS

VDD

24MHz

DTACK

MRST

RCS

DMACK

TEST

114

213

312

411

510

69

78

NC

CLKOUT

CLKIN

NC

48MHz

VSS

VDD

24MHz

DTACK

MRST

RCS

DMACK

TEST

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