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QS3257QG8

P1-P3P4-P5
1
IDTQS3257
HIGH-SPEED CMOS QUICKSWITCH QUAD 2:1 MUX/DEMUX
INDUSTRIAL TEMPERATURE RANGE
FEBRUARY 2011
2011 Integrated Device Technology, Inc. DSC-5756/10c
IDTQS3257
INDUSTRIAL TEMPERATURE RANGE
QUICKSWITCH
®
PRODUCTS
HIGH-SPEED CMOS
QUICKSWITCH
QUAD 2:1 MUX/DEMUX
FUNCTIONAL BLOCK DIAGRAM
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
FEATURES:
• Enhanced N channel FET with no inherent diode to Vcc
•5
ΩΩ
ΩΩ
Ω bidirectional switches connect inputs to outputs
• Pin compatible with the 74F257, 74FCT257, and 74FCT257T
• Zero propagation delay, zero ground bounce
• Undershoot clamp diodes on all switch and control inputs
• TTL-compatible control inputs
• Available in QSOP and S1 packages
APPLICATIONS:
• Logic replacement
• Video, audio, graphics switching, muxing
• Hot-swapping, hot-docking
• Voltage translation (5V to 3.3V)
• Bus funneling
DESCRIPTION:
The QS3257 is a high-speed CMOS LVTTL-compatible Quad 2:1
multiplexer/demultiplexer. The QS3257 is a function and pinout compatible
QuickSwitch version of the 74F257, 74FCT257, and the 74ALS/AS/LS257
Quad 2:1 multiplexers. The low ON resistance of the QS3257 allows inputs
to be connected to outputs without adding propagation delay and without
generating additional ground bounce noise.
Mux/Demux devices provide an order of magnitude faster speed than
equivalent logic devices.
The QS3257 is characterized for operation at -40°C to +85°C.
S
E
Y
A
I0A
I1A
Y
B
Y
C
Y
D
I0B
I1B
I0C
I1C
I0D
I1D
2
INDUSTRIAL TEMPERATURE RANGE
IDTQS3257
HIGH-SPEED CMOS QUICKSWITCH QUAD 2:1 MUX/DEMUX
PIN CONFIGURATION
QSOP/ S1
TOP VIEW
NOTE:
1. H = HIGH Voltage Level
L = LOW Voltage Level
X = Don't Care
Z = High-Impedance
FUNCTION TABLE
(1)
Enable Outputs
E SYA YB YC YD Function
H X Hi-Z Hi-Z Hi-Z Hi-Z Disconnected
LLI0A I0B I0C I0D Select 0
LHI
1A I1B I1C I1D Select 1
Symbol Description Max Unit
VTERM
(2)
Supply Voltage to Ground –0.5 to +7 V
VTERM
(3)
DC Switch Voltage Vs –0.5 to +7 V
VTERM
(3)
DC Input Voltage VIN –0.5 to +7 V
VAC AC Input Voltage (pulse width ≤ 20ns) –3 V
IOUT DC Output Current 120 mA
PMAX Maximum Power Dissipation (TA = 85°C) 0.5 W
T
STG Storage Temperature –65 to +150 °C
ABSOLUTE MAXIMUM RATINGS
(1)
NOTE:
1. Stresses greater than those listed under ABSOLUTE MAXIMUM RATINGS may cause
permanent damage to the device. This is a stress rating only and functional operation
of the device at these or any other conditions above those indicated in the operational
sections of this specification is not implied. Exposure to absolute maximum rating
conditions for extended periods may affect reliability.
2. Vcc terminals.
3. All terminals except Vcc.
CAPACITANCE
(TA = +25°C, f = 1.0MHZ, VIN = 0V, VOUT = 0V)
NOTE:
1. This parameter is measured at characterization but not tested.
Pins Typ. Max.
(1)
Unit
Control Pins 4 5 pF
Quickswitch Channels Demux 5 7 pF
(Switch OFF) Mux 8 9
PIN DESCRIPTION
Pin Names I/O Description
I x x I Data Inputs
S I Select Input
E I Enable Input
Y
A - YD O Data Outputs
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
S
I
0A
I
1A
YA
GND
V
CC
E
I
0B
I
1B
Y
B
I
0D
I
1D
YD
I
0C
I
1C
Y
C
3
IDTQS3257
HIGH-SPEED CMOS QUICKSWITCH QUAD 2:1 MUX/DEMUX
INDUSTRIAL TEMPERATURE RANGE
RON
(ohms)
VIN
(Volts)
TYPICAL ON RESISTANCE vs VIN AT VCC = 5V
Symbol Parameter Test Conditions Min. Typ.
(1)
Max. Unit
VIH Input HIGH Level Guaranteed Logic HIGH for Control Pins 2 — — V
VIL Input LOW Level Guaranteed Logic LOW for Control Pins — — 0.8 V
IIN Input LeakageCurrent (Control Inputs)
(2)
0V ≤ VIN ≤ VCC —— ±1 μA
IOZ Off-State Output Current (Hi-Z) 0V ≤ VOUT ≤ VCC —— ±1 μA
R
ON Switch ON Resistance VCC = Min., VIN = 0V, ION = 30mA — 5 7 Ω
VCC = Min., VIN = 2.4V, ION =15mA — 10 15
VP Pass Voltage
(2)
VIN = VCC = 5V, IOUT = -5μA 3.7 4 4.2 V
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE
Following Conditions Apply Unless Otherwise Specified:
Industrial: TA = –40°C to +85°C, VCC = 5.0V ±5%
NOTES:
1. Typical values are at V
CC = 5.0V, TA = 25°C.
2. Pass Voltage is guaranteed but not production tested.
16
14
12
10
8
6
4
2
0
0.0 0.5
1.0
1.5 2.0 2.5 3.0 3.5
P1-P3P4-P5

QS3257QG8

Mfr. #:
Buy QS3257QG8
Manufacturer:
IDT
Description:
Encoders, Decoders, Multiplexers & Demultiplexers 4X2:1 MUX-DEMUX, QSW
Lifecycle:
New from this manufacturer.
Delivery:
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