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QS3251QG

P1-P3P4-P5
1
IDTQS3251
HIGH-SPEED CMOS QUICKSWITCH 8:1 MUX/DEMUX
INDUSTRIAL TEMPERATURE RANGE
FEBRUARY 2011
2011 Integrated Device Technology, Inc. DSC-5754/5c
IDTQS3251
INDUSTRIAL TEMPERATURE RANGE
QUICKSWITCH
®
PRODUCTS
HIGH-SPEED CMOS
QUICKSWITCH 8:1 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 74F251, 74FCT251, and 74FCT251T
• Zero propagation delay, zero ground bounce
• Undershoot clamp diodes on all switch and control inputs
• TTL-compatible control inputs
• Available in SOIC and QSOP packages
APPLICATIONS:
• Logic replacement
• Video, audio, graphics switching, muxing
• Hot-swapping, hot-docking
• Voltage translation (5V to 3.3V)
DESCRIPTION:
The QS3251 is a high-speed CMOS TTL-compatible 8:1 multiplexer/
demultiplexer. The QS3251 has 3-state outputs. The QS3251 is a function
and pinout compatible version of the 74F251, 74FCT251 and the 74ALS/
AS/LS251 8:1 multiplexers. The low ON resistance of the QS3251 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 QS3251 is characterized for operation at -40°C to +85°C.
S0
Y
I
0
I1
I2
I3
I4
I5
I6
I7
S1
S2
E
2
INDUSTRIAL TEMPERATURE RANGE
IDTQS3251
HIGH-SPEED CMOS QUICKSWITCH 8:1 MUX/DEMUX
PIN CONFIGURATION
SOIC/ QSOP
TOP VIEW
FUNCTION TABLE
(1)
PIN DESCRIPTION
Pin Names I/O Description
I0 - I7 I Data Inputs
S0 - S2 I Select Inputs
E I Enable Input
Y O Data Output
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.
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
I
3
I
2
I
1
I
0
Y
GND
V
CC
S
0
NC
E
S
1
S
2
I
4
I
5
I
6
I
7
Select
E S2 S1 S0 Y Function
H X X X Hi-Z Disable
LL L L I0 S2 - S 0 = 0
LL L H I1 S2 - S 0 = 1
LL H L I2 S2 - S 0 = 2
LL H H I3 S2 - S 0 = 3
LH L L I4 S2 - S 0 = 4
LH L H I5 S2 - S 0 = 5
LH H L I6 S2 - S 0 = 6
LH H H I7 S2 - S 0 = 7
NOTE:
1. H = HIGH Voltage Level
L = LOW Voltage Level
X = Don’t Care
Z = High-Impedence
Pins Typ. Max.
(1)
Unit
Control Inputs 4 5 pF
Quickswitch Channels Demux 5 7 pF
(Switch OFF) Mux 21 23
CAPACITANCE (TA = +25°C, f = 1MHz, VIN = 0V, VOUT = 0V)
NOTE:
1. This parameter is guaranteed but not production tested.
3
IDTQS3251
HIGH-SPEED CMOS QUICKSWITCH 8:1 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) 0V ≤ VIN ≤ VCC —— ±1 μA
IOZ Off-State Output Current (Hi-Z) 0V ≤ VOUT ≤ VCC —— ±1 μA
R
ON Switch ON Resistance
(2)
VCC = Min., VIN = 0V, ION = 30mA — 5 7 Ω
VCC = Min., VIN = 2.4V, ION =15mA — 10 15
VP Pass Voltage
(3)
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. R
ON is guaranteed but not production tested.
3. 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

QS3251QG

Mfr. #:
Buy QS3251QG
Manufacturer:
IDT
Description:
Encoders, Decoders, Multiplexers & Demultiplexers 8:1 MUX-DEMUX, QSW
Lifecycle:
New from this manufacturer.
Delivery:
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