ON Semiconductor 74FST3257 User Manual

74FST3257

Quad 2:1 Multiplexer/
Demultiplexer Bus Switch

The ON Semiconductor 74FST3257 is a quad 2:1, high performance
multiplexer/demultiplexer bus switch. The device is CMOS TTL
compatible when operating between 4 and 5.5 Volts. The device
exhibits extremely low R
The device adds no noise or ground bounce to the system.

Features

• R

t 4 W Typical

ON

• 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 QS3257, FST3257, CBT3257

• All Popular Packages: SOIC−16, TSSOP−16, QFN16

• NLV Prefix for Automotive and Other Applications Requiring

Unique Site and Control Change Requirements; AEC−Q100
Qualified and PPAP Capable

• These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS

Compliant

and adds nearly zero propagation delay.

ON

16

SOIC−16

D SUFFIX

CASE 751B

16

TSSOP−16
DT SUFFIX

CASE 948F

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16

1

1

MARKING

DIAGRAMS

FST3257G

AWLYWW

1

16

FST

3257

ALYW G

G

1

SV

1

1B

2

1

1B

3

2

1A

4

2B

5

1

2B

6

2

2A

7

GND 3A

89

16
15
14
13
12
11
10

OE
4B

4B

4A
3B

3B

CC

1B

1
2

1

2

1B

1A

2B
2B

2A

Figure 1. 16−Lead Pinout Diagrams

S

X
L
H

OE

H

L
L

Function

Disconnect

Figure 2. Truth Table

2

1

3

2

4
5

1

6

2

7

A = B
A = B

V

S

CC

1

16

GND

89

GND 3A

1
2

15
14
13
12
11
10

OE
4B

4B

4A
3B

3B

1

QFN16

MN SUFFIX

1
2

1

2

CASE 485AW

A = Assembly Location
WL, L = Wafer Lot
Y = Year
WW, W = Work Week
G or G = Pb−Free Package

(Note: Microdot may be in either location)

3257

ALYWG

G

PIN NAMES

Pin

OE1, OE

B1, B2, B3, B

2

S0, S

1

A Bus A

4

Description

Bus Switch Enables

Select Inputs

Bus B

ORDERING INFORMATION

See detailed ordering and shipping information in the package
dimensions section on page 2 of this data sheet.

© Semiconductor Components Industries, LLC, 2011

May, 2018 − Rev. 8

1 Publication Order Number:

74FST3257/D

74FST3257

1A

2A

3A

4A

FLOW CONTROL

1B

1B

2B

2B

3B

3B

4B

4B

OE

S

2

1

2

1

2

1

2

Figure 3. Logic Diagram

ORDERING INFORMATION

Device Order Number Package Shipping

74FST3257DR2G
NLV74FST3257DR2G*
74FST3257DTR2G TSSOP−16

SOIC−16

(Pb−Free)

2500 Units / Tape & Reel

2500 Units / Tape & Reel

(Pb−Free)

74FST3257MNTWG QFN16

3000 Units / Tape & Reel

(Pb−Free)

†For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging

Specifications Brochure, BRD8011/D.

*NLV Prefix for Automotive and Other Applications Requiring Unique Site and Control Change Requirements; AEC−Q100 Qualified and PPAP

Capable.

†

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2

74FST3257

MAXIMUM RATINGS

Symbol Parameter Value Units

V

CC

V

V

I

IK

I

OK

I

O

I

CC

I

GND

T

STG

T
T

q

JA

MSL Moisture Sensitivity Level 1

F

V

ESD

I

Latchup

Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality
should not be assumed, damage may occur and reliability may be affected.

1. Tested to EIA/JESD22−A114−A.

2. Tested to EIA/JESD22−A115−A.

3. Tested to JESD22−C101−A.

4. Tested to EIA/JESD78.

DC Supply Voltage −0.5 to +7.0 V
DC Input Voltage −0.5 to +7.0 V

I

DC Output Voltage −0.5 to +7.0 V

O

DC Input Diode Current

V

t GND −50

I

DC Output Diode Current

V

t GND −50

O

DC Output Sink Current 128 mA
DC Supply Current per Supply Pin ±100 mA
DC Ground Current per Ground Pin ±100 mA
Storage Temperature Range −65 to +150
Lead Temperature, 1 mm from Case for 10 Seconds 260

L

Junction Temperature Under Bias +150

J

Thermal Resistance

Flammability Rating

R

SOIC
TSSOP
QFN

Oxygen Index: 28 to 34

UL 94 V−0 @ 0.125 in

125
170
N/A

ESD Withstand Voltage

Human Body Model (Note 1)
Machine Model (Note 2)
Charged Device Model (Note 3)

u2000

u200

N/A

Latchup Performance

Above V

and Below GND at 85_C (Note 4)

CC

±500

mA

mA

_C
_C
_C

_C/W

V

mA

RECOMMENDED OPERATING CONDITIONS

Symbol Parameter Min Max Units

V

CC

V

V

T

Dt/DV

Supply Voltage

Operating, Data Retention Only

Input Voltage (Note 5) 0 5.5 V

I

Output Voltage (HIGH or LOW State) 0 5.5 V

O

Operating Free−Air Temperature −40 +85

A

4.0 5.5

Input Transition Rise or Fall Rate Switch Control Input
Switch I/O V

= 5.0 V ± 0.5 V

CC

0

DC

5

5. Unused control inputs may not be left open. All control inputs must be tied to a high or low logic input voltage level.

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3

V

_C

ns/V