74FST3244QS datasheet(1/7 Pages) ONSEMI

tên linh kiện	74FST3244QS

Giải thích chi tiết về linh kiện	8?묪it Bus Switch

PDF	7 Pages

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nhà sản xuất	ONSEMI [ON Semiconductor]

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June, 2006 − Rev. 2

1

Publication Order Number:

74FST3244/D

74FST3244

8−Bit Bus Switch

The ON Semiconductor 74FST3244 is an 8−bit, high performance

switch. The device is CMOS TTL compatible when operating between

4 and 5.5 Volts. The device exhibits extremely low RON and adds

nearly zero propagation delay. The device adds no noise or ground

bounce to the system.

The device consists of two 4−bit switches with separate

Output/Enable (OE) pins. Port A is connected to Port B when OE is

low. If OE is high, the switch is high Z.

Features

• RON t 4 W Typical

• Less Than 0.25 ns−Max Delay Through Switch

• Nearly Zero Standby Current

• No Circuit Bounce

• Control Inputs are TTL/CMOS Compatible

• Pin−For−Pin Compatible with QS3244, FST3244, CBT3244

• All Popular Packages: QSOP−20, TSSOP−20, SOIC−20

• All Devices in Package TSSOP are Inherently Pb−Free*

OE1

1A1

2B1

1A2

2B2

2B3

1A0

VCC

2A3

1B2

2A2

1B1

1B0

OE2

1

2

3

4

5

6

7

20

19

18

17

16

15

14

Figure 1. 20−Lead Pinout

1A3

8

2B0

9

GND

10

2A1

13

1B3

12

2A0

11

OE1

L

Inputs

L

H

OE2

L

H

L

HH

1A, 1B

1A = 1B

Inputs/Outputs

Z

2A, 2B

2A = 2B

Z

2A = 2B

Z

TRUTH TABLE

*For additional information on our Pb−Free strategy and soldering details, please

download the ON Semiconductor Soldering and Mounting Techniques

Reference Manual, SOLDERRM/D.

Description

PIN NAMES

OE1, OE2

1A, 2A

TSSOP−20

DT SUFFIX

CASE 948E

QSOP−20

QS SUFFIX

CASE 492A

SOIC−20

DW SUFFIX

CASE 751D

MARKING

DIAGRAMS

Bus Switch Enables

Bus A

1B, 2B

Bus B

20

1

FST3244

AWLYYWW

1

20

1

FST

3244

ALYW

A

=

Assembly Location

L, WL

=

Wafer Lot

Y

=

Year

W, WW =

Work Week

1

20

FST3244

AWLYWW

20

1

See detailed ordering and shipping information in the package

dimensions section on page 2 of this data sheet.

ORDERING INFORMATION

20

1

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