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UT54ACTS245E

Octal Bus Transceiver with Three-State Outputs

July 20013

www.aeroflex.com/Logic

Datasheet

FEATURES

 Three-state outputs drive bus line directly

 m CRH CMOS process

- Latchup immune

 High speed

 Low power consumption

 Wide power supply operating range of 3.0V to 5.5V

 Available QML Q or V processes

Flexible package

 - 20-lead flatpack

UT54ACTS245E-SMD-5962-96573

DESCRIPTION

The UT54ACTS245E is a non-inverting octal bus transceiver

designed for asynchronous two-way communication between

data buses. The control function implementation minimizes

external timing requirements.

The device allows data transmission from the A bus to the B

bus or from the B bus to the A bus depending upon the logic

level at the direction control (DIR) input. The enable input (G)

disables the device so that the buses are effectively isolated.

The device is characterized over full HiRel temperature range

of -55

C to +125C.

FUNCTION TABLE

PINOUTS

20-Lead Flatpack

Top View

LOGIC SYMBOL

ENABLE

G

DIRECTION

CONTROL DIR

OPERATION

L

L

B Data To A Bus

L

H

A Data To B Bus

H

X

Isolation

1

2

3

4

5

7

6

20

19

18

17

16

14

15

DIR

A1

A2

A3

A4

A5

A6

G

B1

B2

B3

B5

8

13

A7

B6

B4

9

12

A8

B7

10

11

B8

(19)

G

G3

(2)

A1

(3)

A2

(4)

(18)

B1

(16)

(17)

B2

Note:

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

Publication 617-12.

A3

(5)

A4

(6)

A5

(7)

A6

B3

(13)

B6

(14)

B5

(15)

B4

(8)

A7

(9)

A8

(11)

B8

(12)

B7

(1)

DIR

3 EN1 (BA)

3 EN2 (AB)

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