CD54HC245 datasheet(1/17 Pages) TI1

Part #	CD54HC245

Description	High-Speed CMOS Logic Octal-Bus Transceiver, Three-State, Non-Inverting

PDF	17 Pages

Scroll/Zoom	100%

Manufacturer	TI1 [Texas Instruments]

Direct Link	http://www.ti.com

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1

Data sheet acquired from Harris Semiconductor

SCHS119A

Features

• Buffered Inputs

• Three-State Outputs

• Bus Line Driving Capability

• Typical Propagation Delay (A to B, B to A) 9ns at VCC

= 5V, CL = 15pF, TA = 25

oC

• Fanout (Over Temperature Range)

- Standard Outputs . . . . . . . . . . . . . . . 10 LSTTL Loads

- Bus Driver Outputs . . . . . . . . . . . . . 15 LSTTL Loads

• Wide Operating Temperature Range . . . -55oC to 125oC

• Balanced Propagation Delay and Transition Times

• Signiﬁcant Power Reduction Compared to LSTTL

Logic ICs

• HC Types

- 2V to 6V Operation

- High Noise Immunity: NIL = 30%, NIH = 30% of VCC

at VCC = 5V

• HCT Types

- 4.5V to 5.5V Operation

- Direct LSTTL Input Logic Compatibility,

VIL= 0.8V (Max), VIH = 2V (Min)

- CMOS Input Compatibility, Il ≤ 1µA at VOL, VOH

Pinout

CD54HC245, CD54HCT245

(CERDIP)

CD74HC245, CD74HCT245

(PDIP, SOIC)

TOP VIEW

Description

The

CD54HC245,

CD54HCT245,

and

CD74HC245,

CD74HCT245 are high-speed octal three-state bidirectional

transceivers

intended

for

two-way

asynchronous

communication between data buses. They have high drive

current outputs which enable high-speed operation while

driving large bus capacitances. They provide the low power

consumption of standard CMOS circuits with speeds and

drive capabilities comparable to that of LSTTL circuits.

The

CD54HC245,

CD54HCT245,

CD74HC245

and

CD74HCT245 allow data transmission of the B bus or from

the B bus to the A bus. The logic level at the direction input

(DIR) determines the direction. The output enable input

(OE), when high, puts the I/O ports in the high-impedance

state.

The HC/HCT245 is similar in operation to the HC/HCT640

and the HC/HCT643.

11

12

13

14

15

16

17

18

20

19

10

9

8

7

6

5

4

3

2

1

DIR

A0

A1

A2

A3

A4

A6

A5

A7

GND

VCC

B0

B1

B2

OE

B3

B4

B5

B6

B7

Ordering Information

PART NUMBER

TEMP.

RANGE (oC)

PACKAGE

CD54HC245F3A

-55 to 125

20 Ld CERDIP

CD54HCT245F3A

-55 to 125

20 Ld CERDIP

CD74HC245E

-55 to 125

20 Ld PDIP

CD74HC245M

-55 to 125

20 Ld SOIC

CD74HC245M96

-55 to 125

20 Ld SOIC

CD74HCT245E

-55 to 125

20 Ld PDIP

CD74HCT245M

-55 to 125

20 Ld SOIC

CD74HCT245M96

-55 to 125

20 Ld SOIC

NOTE: When ordering, use the entire part number. The sufﬁx 96

denotes tape and reel.

CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures.

Copyright

CD54HC245, CD74HC245,

CD54HCT245, CD74HCT245

High-Speed CMOS Logic Octal-Bus Transceiver,

Three-State, Non-Inverting

[ /Title

(CD54

HC245

,

CD54

HCT24

5,

CD74

HC245

,

CD74

HCT24

5)

/Sub-

ject

(High

Speed

November 1997 - Revised May 2003

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