74FST3251 ON, 74FST3251 Datasheet

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74FST3251

Manufacturer Part Number
74FST3251
Description
8:1 Multiplexer/Demultiplexer Bus Switch
Manufacturer
ON
Datasheet

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
74FST3251DTR2
Manufacturer:
HONEYWELL
Quantity:
10 000
Part Number:
74FST3251Q
Quantity:
37
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.
NOTE: H = HIGH Voltage Level, L = LOW Voltage Level, X = Don’t Care
January, 2002 – Rev. 1
The ON Semiconductor 74FST3251 is an 8:1, high performance
R
Less Than 0.25 ns–Max Delay Through Switch
Nearly Zero Standby Current
No Circuit Bounce
Control Inputs are TTL/CMOS Compatible
All Popular Packages: QSOP–16, TSSOP–16, SOIC–16
Semiconductor Components Industries, LLC, 2002
OE
ON
H
L
L
L
L
L
L
L
L
t 4 W Typical
S2
H
H
H
H
X
L
L
L
L
GND
NC
OE
Inputs
B4
B3
B2
B1
A
QSOP/SSOP/TSSOP
ON
S1
H
H
H
H
L
L
L
L
X
1
2
3
4
5
6
7
8
TOP VIEW
and adds nearly zero propagation delay.
S0
H
H
H
H
X
L
L
L
L
16
15
14
13
12
10
11
9
V
B5
B6
B7
B8
S0
S1
S2
CC
A Port = B1 Port
A Port = B2 Port
A Port = B3 Port
A Port = B4 Port
A Port = B5 Port
A Port = B6 Port
A Port = B7 Port
A Port = B8 Port
Disconnect
Function
1
PIN NAMES
ORDERING INFORMATION
74FST3251D
74FST3251DR2
74FST3251DT
74FST3251DTR2
74FST3251QS
74FST3251QSR
OE
S
A
B
0
1
16
, S
, B
Device
16
16
1
CASE 751B
CASE 948F
TSSOP–16
DT SUFFIX
, OE
D SUFFIX
QS SUFFIX
1
2
CASE 492
QSOP–16
, B
SO–16
2
3
Pin
1
, B
A
L, WL
Y
W, WW = Work Week
1
4
1
http://onsemi.com
TSSOP–16
TSSOP–16
QSOP–16
QSOP–16
= Assembly Location
= Wafer Lot
= Year
Package
SO–16
SO–16
16
1
Publication Order Number:
16
16
1
1
Bus Switch Enables
DIAGRAMS
Select Inputs
Description
MARKING
AWLYWW
FST3251
2500 Units/Reel
2500 Units/Reel
2500 Units/Reel
S3251
ALYW
ALYW
Bus A
Bus B
3251
FST
48 Units/Rail
96 Units/Rail
96 Units/Rail
74FST3251/D
Shipping

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74FST3251 Summary of contents

Page 1

... The ON Semiconductor 74FST3251 is an 8:1, 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 and adds nearly zero propagation delay. ON The device adds no noise or ground bounce to the system Typical R ON Less Than 0.25 ns– ...

Page 2

... 74FST3251 Figure 1. Logic Diagram http://onsemi.com ...

Page 3

... V Output Voltage O T Operating Free–Air Temperature A Dt/DV Input Transition Rise or Fall Rate Switch I/O 5. Unused control inputs may not be left open. All control inputs must be tied to a high or low logic input voltage level. 74FST3251 Parameter t GND GND V O SOIC TSSOP QSOP ...

Page 4

... On resistance of the switch and the 50 pF load capacitance, when driven by an ideal voltage source (zero output impedance). CAPACITANCE (Note 8) Symbol Parameter C Control Pin Input Capacitance Port Input/Output Capacitance I Port Input/Output Capacitance I/O = )25_C MHz, Capacitance is characterized but not tested 74FST3251 Conditions = *18mA 5 ...

Page 5

... AC Loading and Waveforms FROM OUTPUT UNDER TEST NOTES: 1. Input driven source terminated includes load and stray capacitance Figure 2. AC Test Circuit 1.5 V SWITCH INPUT PLH 1.5 V OUTPUT Figure 3. Propagation Delays ENABLE INPUT 1 ...

Page 6

... G K –T– 16X REF 16 L PIN 1 IDENT –V– C –T– D 74FST3251 PACKAGE DIMENSIONS SO–16 D SUFFIX CASE 751B–05 ISSUE TSSOP–16 DT SUFFIX CASE 948F–01 ISSUE É É É ...

Page 7

... R –B– 74FST3251 PACKAGE DIMENSIONS QSOP–16 QS SUFFIX CASE 492–01 ISSUE 45_ U RAD. 0.013 X 0.005 DP. MAX RAD. 0.005–0.010 TYP P DETAIL –T– SEATING PLANE DETAIL E http://onsemi.com 7 MOLD PIN ...

Page 8

... N. American Technical Support: 800–282–9855 Toll Free USA/Canada 74FST3251 JAPAN: ON Semiconductor, Japan Customer Focus Center 4–32–1 Nishi–Gotanda, Shinagawa–ku, Tokyo, Japan 141–0031 Phone: 81–3–5740–2700 Email: r14525@onsemi.com ON Semiconductor Website: http://onsemi.com For additional information, please contact your local Sales Representative. http://onsemi.com 8 74FST3251/D ...

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