IDT74FCT157CTQG [IDT]
FAST CMOS QUAD 2-INPUT MULTIPLEXER; FAST CMOS四2输入多路复用器
| 型号： | IDT74FCT157CTQG |
| 厂家： | 
INTEGRATED DEVICE TECHNOLOGY |
| 描述： | FAST CMOS QUAD 2-INPUT MULTIPLEXER |
| 文件： | 总6页 (文件大小：73K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
FAST CMOS
QUAD 2-INPUT
MULTIPLEXER
IDT74FCT157AT/CT/DT
DESCRIPTION:
FEATURES:
The FCT157Tis a high-speedquad2-inputmultiplexerbuiltusingan
advanceddualmetalCMOStechnology. Fourbitsofdatafromtwosources
canbeselectedusingthecommonselectinput. Thefourbufferedoutputs
presentthe selecteddata inthe true (non-inverting)form.
• A, C, and D grades
• Low input and output leakage ≤1µA (max.)
• CMOS power levels
• True TTL input and output compatibility:
– VOH = 3.3V (typ.)
– VOL = 0.3V (typ.)
• High Drive outputs (-15mA IOH, 48mA IOL)
• Meets or exceeds JEDEC standard 18 specifications
• Power off disable outputs permit "live insertion"
• Available in SOIC and QSOP packages
The FCT157T has a common, active-low, enable input. When the
enableinputisnotactive,allfouroutputsareheldlow. Acommonapplication
of FCT157T is to move data from two different groups of registers to a
commonbus. Anotherapplicationisasafunctiongenerator. TheFCT157T
cangenerateanyfourofthe16differentfunctionsoftwovariableswithone
variablecommon.
FUNCTIONALBLOCKDIAGRAM
S
E
Three other multiplexers
I1B 1D
I
D
ZB Z
I0B 0D
I
1A
I
ZA
0A
I
TheIDTlogoisaregisteredtrademarkofIntegratedDeviceTechnology,Inc.
INDUSTRIAL TEMPERATURE RANGE
JUNE 2006
1
© 2006 Integrated Device Technology, Inc.
DSC-5502/5
IDT74FCT157AT/CT/DT
FASTCMOSQUAD2-INPUTMULTIPLEXER
INDUSTRIALTEMPERATURERANGE
ABSOLUTEMAXIMUMRATINGS(1)
PINCONFIGURATION
Symbol
Description
Max
Unit
V
(2)
VTERM
Terminal Voltage with Respect to GND
–0.5 to +7
(3)
VTERM
Terminal Voltage with Respect to GND –0.5 to VCC+0.5
V
1
2
3
S
I0A
I1A
ZA
I0B
16
15
14
13
VCC
E
TSTG
IOUT
Storage Temperature
DC Output Current
–65 to +150
–60 to +120
° C
mA
NOTES:
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. No terminal voltage may exceed
Vcc by +0.5V unless otherwise noted.
I0C
I1C
ZC
I0D
I1D
ZD
4
5
6
12
11
10
9
2. Inputs and Vcc terminals only.
3. Output and I/O terminals only.
I1B
7
8
ZB
CAPACITANCE (TA = +25°C, F = 1.0MHz)
Symbol
Parameter(1)
Input Capacitance
Output Capacitance
Conditions
Typ.
Max. Unit
GND
CIN
VIN = 0V
6
10
12
pF
pF
COUT
VOUT = 0V
8
NOTE:
1. This parameter is measured at characterization but not tested.
SOIC/ QSOP
TOP VIEW
PINDESCRIPTION
Pin Names
I0A - I0D
I1A - I1D
E
Description
Source 0 Data Inputs
Source 1 Data Inputs
Enable Input (Active LOW)
Select Input
S
ZA - ZD
Outputs
FUNCTIONTABLE(1)
Inputs
Outputs
E
H
L
L
L
L
S
I0
X
X
X
L
I1
X
L
Zx
L
X
H
H
L
L
L
H
X
X
H
L
H
H
NOTE:
1. H = HIGH Voltage Level
X = Don’t Care
L = LOW Voltage Level
Z = High Impedance
2
IDT74FCT157AT/CT/DT
FASTCMOSQUAD2-INPUTMULTIPLEXER
INDUSTRIALTEMPERATURERANGE
DCELECTRICALCHARACTERISTICSOVEROPERATINGRANGE
FollowingConditionsApplyUnlessOtherwiseSpecified:
Industrial: TA = –40°C to +85°C, VCC = 5.0V ±5%
Symbol
VIH
VIL
Parameter
Input HIGH Level
Test Conditions(1)
Guaranteed Logic HIGH Level
Min.
2
Typ.(2)
—
Max.
—
0.8
1
Unit
V
Input LOW Level
Guaranteed Logic LOW Level
VCC = Max.
—
—
—
—
—
—
—
—
—
—
V
IIH
Input HIGH Current(4)
Input LOW Current(4)
High Impedance Output Current(4)
VI = 2.7V
VI = 0.5V
VI = 2.7V
VI = 0.5V
—
µA
µA
µA
IIL
VCC = Max.
—
1
IOZH
IOZL
II
VCC = Max., VI = VCC (Max.)
—
1
—
1
Input HIGH Current(4)
Clamp Diode Voltage
Input Hysteresis
VCC = Max., VI = VCC (Max.)
VCC = Min., IIN = –18mA
—
1
µA
V
VIK
VH
–0.7
200
0.01
–1.2
—
1
—
mV
mA
ICC
Quiescent Power Supply Current
VCC = Max.
VIN = GND or VCC
OUTPUTDRIVECHARACTERISTICS
Symbol
Parameter
Test Conditions(1)
IOH = –8mA
Min.
2.4
2
Typ.(2)
3.3
Max.
—
Unit
VOH
OutputHIGHVoltage
VCC = Min
V
VIN = VIH or VIL
VCC = Min
IOH = –15mA
IOL = 48mA
3
—
VOL
Output LOWVoltage
—
0.3
0.5
V
VIN = VIH or VIL
(3)
IOS
Short Circuit Current
Input/Output Power Off Leakage(5)
VCC = Max., VO = GND
–60
—
–120
—
–225
1
mA
µA
IOFF
VCC = 0V, VIN or VO ≤ 4.5V
NOTES:
1. For conditions shown as Min. or Max., use appropriate value specified under Electrical Characteristics for the applicable device type.
2. Typical values are at VCC = 5.0V, +25°C ambient.
3. Not more than one output should be tested at one time. Duration of the test should not exceed one second.
4. The test limit for this parameter is ±5µA at TA = –55°C.
5. This parameter is guaranteed but not tested.
3
IDT74FCT157AT/CT/DT
FASTCMOSQUAD2-INPUTMULTIPLEXER
INDUSTRIALTEMPERATURERANGE
POWERSUPPLYCHARACTERISTICS
Symbol
Parameter
Test Conditions(1)
Min.
Typ.(2)
Max.
Unit
ΔICC
Quiescent Power Supply Current
TTL Inputs HIGH
VCC = Max.
VIN = 3.4V
—
0.5
2
mA
(3)
ICCD
Dynamic Power Supply
Current(4)
VCC = Max.
Outputs Open
E = GND
VIN = VCC
VIN = GND
—
0.15
0.25
mA/
MHz
One Input Toggling
50% Duty Cycle
IC
Total Power Supply Current(6)
VCC = Max.
Outputs Open
fo = 10MHz
VIN = VCC
VIN = GND
—
—
—
—
1.5
1.8
1.5
2.5
3.5
4.5
mA
mA
50% Duty Cycle
E = GND
One Bit Toggling
VIN = 3.4V
VIN = GND
(5)
3.5
VCC = Max.
Outputs Open
fo = 2.5MHz
VIN = VCC
VIN = GND
(5)
7.5
50% Duty Cycle
E = GND
Four Bits Toggling
VIN = 3.4V
VIN = GND
NOTES:
1. For conditions shown as Min. or Max., use appropriate value specified under Electrical Characteristics for the applicable device type.
2. Typical values are at VCC = 5.0V, +25°C ambient.
3. Per TTL driven input (VIN = 3.4V). All other inputs at VCC or GND.
4. This parameter is not directly testable, but is derived for use in Total Power Supply Calculations.
5. Values for these conditions are examples of ΔICC formula. These limits are guaranteed but not tested.
6. IC = IQUIESCENT + IINPUTS + IDYNAMIC
IC = ICC + ΔICC DHNT + ICCD (fONO)
ICC = Quiescent Current
ΔICC = Power Supply Current for a TTL High Input (VIN = 3.4V)
DH = Duty Cycle for TTL Inputs High
NT = Number of TTL Inputs at DH
ICCD = Dynamic Current caused by an Input Transition Pair (HLH or LHL)
fO = Output Frequency
NO = Number of Outputs at fO
All currents are in milliamps and all frequencies are in megahertz.
SWITCHINGCHARACTERISTICSOVEROPERATINGRANGE
IDT74FCT151AT IDT74FCT151CT IDT74FCT151DT
Symbol
tPLH
Parameter
Condition(1)
CL = 50pF
RL = 500Ω
Min.(2)
Max.
Min.(2)
Max.
Min.(2) Max.
Unit
PropagationDelay
Ix to Zx
1.5
5
1.5
4.3
1.5
1.5
1.5
3.9
4.4
4.6
ns
tPHL
tPLH
PropagationDelay
E to Zx
PropagationDelay
S to Zx
1.5
1.5
6
7
1.5
1.5
4.8
5.2
ns
ns
tPHL
tPLH
tPHL
NOTES:
1. See test circuit and waveforms.
2. Minimum limits are guaranteed but not tested on Propagation Delays.
4
IDT74FCT157AT/CT/DT
FASTCMOSQUAD2-INPUTMULTIPLEXER
INDUSTRIALTEMPERATURERANGE
TESTCIRCUITSANDWAVEFORMS
VCC
SWITCHPOSITION
7.0V
Test
Switch
Closed
Open
500W
Open Drain
Disable Low
Enable Low
VOUT
VIN
Pulse
Generator
D.U.T
.
All Other Tests
50pF
500W
T
R
DEFINITIONS:
CL = Load capacitance: includes jig and probe capacitance.
L
C
RT = Termination resistance: should be equal to ZOUT of the Pulse Generator.
Octal Link
Test Circuits for All Outputs
3V
DATA
1.5V
0V
INPUT
LOW-HIGH-LOW
tH
tSU
1.5V
PULSE
3V
1.5V
0V
TIMING
INPUT
ASYNCHRONOUS CONTROL
tW
tREM
PRESET
CLEAR
ETC.
3V
1.5V
0V
HIGH-LOW-HIGH
PULSE
1.5V
SYNCHRONOUS CONTROL
PRESET
3V
1.5V
0V
CLEAR
tSU
tH
CLOCK ENABLE
ETC.
Pulse Width
Octal Link
Octal Link
Set-Up, Hold, and Release Times
ENABLE
DISABLE
3V
1.5V
0V
3V
SAME PHASE
CONTROL
INPUT
1.5V
0V
INPUT TRANSITION
tPLH
tPLH
tPHL
tPHL
tPZL
tPLZ
VOH
1.5V
VOL
OUTPUT
3.5V
1.5V
3.5V
VOL
VOH
OUTPUT
NORMALLY
LOW
SWITCH
CLOSED
0.3V
0.3V
3V
1.5V
0V
tPZH
tPHZ
OPPOSITE PHASE
INPUT TRANSITION
OUTPUT
NORMALLY
HIGH
SWITCH
OPEN
1.5V
0V
0V
Octal Link
Octal Link
Propagation Delay
Enable and Disable Times
NOTES:
1. Diagram shown for input Control Enable-LOW and input Control Disable-HIGH.
2. Pulse Generator for All Pulses: Rate ≤ 1.0MHz; tF ≤ 2.5ns; tR ≤ 2.5ns.
5
IDT74FCT157AT/CT/DT
FASTCMOSQUAD2-INPUTMULTIPLEXER
INDUSTRIALTEMPERATURERANGE
ORDERINGINFORMATION
IDT
XX
FCT XXXX
X
Device
Type
Package
Temperature
Range
SO
SOG
Q
Small Outline IC (300 mil)
SSOP - Green
Quarter-size Small Outline Package
QSOP - Green
QG
157AT Quad 2-Input Multiplexer
157CT
157DT
74
- 40°C to +85°C
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www.idt.com
6
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