IDT74FCT257ATDQ [IDT]
FAST CMOS QUAD 2-INPUT MULTIPLEXER; FAST CMOS四2输入多路复用器
| 型号： | IDT74FCT257ATDQ |
| 厂家： | 
INTEGRATED DEVICE TECHNOLOGY |
| 描述： | FAST CMOS QUAD 2-INPUT MULTIPLEXER |
| 文件： | 总7页 (文件大小：75K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
FAST CMOS
IDT54/74FCT257T/AT/CT/DT
QUAD 2-INPUT
MULTIPLEXER
DESCRIPTION:
FEATURES:
The FCT257T is a high-speed quad 2-input multiplexer built using an
advanceddualmetalCMOStechnology. Fourbitsofdatafromtwosources
canbeselectedusingthecommonselectinput. Thefourbufferedoutputs
present the selected data in the true (non-inverting) form.
• Std., 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.)
The FCT257T has a common Output Enable (OE) input. When OE is
high,alloutputsareswitchedtoahigh-impedancestateallowingtheoutputs
tointerfacedirectlywithbus-orientedsystems.
• High Drive outputs (-15mA IOH, 48mA IOL)
• Meets or exceeds JEDEC standard 18 specifications
• Military product compliant to MIL-STD-883, Class B and DESC
listed (dual marked)
• Power off disable outputs permit "live insertion"
• Available in the following packages:
– Industrial: SOIC, QSOP
– Military: CERDIP, LCC
FUNCTIONALBLOCKDIAGRAM
S
Three other multiplexers
I1B
I0B
I1D
I0D
Z B Z D
1A
I
Z A
0A
I
OE
TheIDTlogoisaregisteredtrademarkofIntegratedDeviceTechnology,Inc.
MILITARY AND INDUSTRIAL TEMPERATURE RANGES
JUNE 2001
1
© 2002 Integrated Device Technology, Inc.
DSC-5500/2
IDT54/74FCT257T/AT/CT/DT
FASTCMOSQUAD2-INPUTMULTIPLEXER
MILITARYANDINDUSTRIALTEMPERATURERANGES
PINCONFIGURATION
INDEX
1
2
3
S
I0A
I1A
ZA
I0B
16
15
14
13
VCC
OE
I0C
I1C
ZC
3
2
20 19
1
4
5
6
7
8
18
17
16
15
14
I1A
I0C
I1C
NC
ZC
I0D
ZA
4
5
6
NC
I0B
I1B
12
11
10
9
I1B
I0D
I1D
ZD
7
8
ZB
9
10 11 12 13
GND
CERDIP/ SOIC/ QSOP
TOP VIEW
LCC
TOP VIEW
ABSOLUTEMAXIMUMRATINGS(1)
PINDESCRIPTION
Pin Names
Description
Symbol
Description
Max
Unit
V
(2)
VTERM
Terminal Voltage with Respect to GND
–0.5 to +7
I0A–I0D
I1A–I1D
OE
Source 0 Data Inputs
Source 1 Data Inputs
(3)
VTERM
Terminal Voltage with Respect to GND –0.5 to VCC+0.5
V
TSTG
IOUT
Storage Temperature
DC Output Current
–65 to +150
–60 to +120
°C
mA
Output Enable (Active LOW)
Select Input
S
NOTES:
ZA–ZD
Outputs
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.
FUNCTIONTABLE(1)
2. Inputs and Vcc terminals only.
3. Output and I/O terminals only.
Inputs
OE
H
L
S
X
H
H
L
I0
X
X
X
L
I1
X
L
Output Zx
Z
L
CAPACITANCE (TA = +25°C, F = 1.0MHz)
L
H
X
X
H
L
Symbol
Parameter(1)
Input Capacitance
Output Capacitance
Conditions
Typ.
Max. Unit
L
CIN
VIN = 0V
6
8
10
12
pF
pF
L
L
H
H
COUT
VOUT = 0V
NOTE:
NOTE:
1. H = HIGH Voltage Level
L = LOW Voltage Level
X = Don’t Care
1. This parameter is measured at characterization but not tested.
Z = High-Impedance
2
IDT54/74FCT257T/AT/CT/DT
MILITARYANDINDUSTRIALTEMPERATURERANGES
FASTCMOSQUAD2-INPUTMULTIPLEXER
DCELECTRICALCHARACTERISTICSOVEROPERATINGRANGE
FollowingConditionsApplyUnlessOtherwiseSpecified:
Industrial: TA = –40°C to +85°C, VCC = 5.0V ±5%; Military: TA = –55°C to +125°C, VCC = 5.0V ±10%
Symbol
VIH
Parameter
Input HIGH Level
Test Conditions(1)
Guaranteed Logic HIGH Level
Min.
2
Typ.(2)
—
Max.
—
Unit
V
VIL
Input LOW Level
Guaranteed Logic LOW Level
VCC = Max.
—
—
—
—
—
—
—
—
—
—
0.8
±1
±1
±1
±1
±1
–1.2
—
V
IIH
Input HIGH Current(4)
Input LOW Current(4)
High Impedance Output Current
(3-State output pins)(4)
Input HIGH Current(4)
ClampDiodeVoltage
Input Hysteresis
VI = 2.7V
VI = 0.5V
VO = 2.7V
VO = 0.5V
—
µA
µA
µA
IIL
VCC = Max.
—
IOZH
IOZL
VCC = Max
—
—
II
VCC = Max., VI = VCC (Max.)
VCC = Min, IIN = -18mA
—
µA
V
VIK
VH
ICC
–0.7
200
0.01
—
mV
mA
Quiescent Power Supply Current
VCC = Max., VIN = GND or VCC
1
OUTPUTDRIVECHARACTERISTICS
Symbol
Parameter
Test Conditions(1)
Min.
2.4
2
Typ.(2)
3.3
3
0.3
Max.
—
—
Unit
VOH
Output HIGH Voltage
VCC = Min
IOH = –8mA
IOH = –15mA
IOL = 48mA
V
VIN = VIH or VIL
VOL
OutputLOWVoltage
VCC = Min
—
0.5
V
VIN = VIH or VIL
IOS
Short Circuit Current
Input/Output Power Off Leakage(5)
VCC = Max., VO = GND(3)
VCC = 0V, VIN or VO ≤ 4.5V
–60
—
–120
—
–225
±1
mA
µA
IOFF
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
IDT54/74FCT257T/AT/CT/DT
FASTCMOSQUAD2-INPUTMULTIPLEXER
MILITARYANDINDUSTRIALTEMPERATURERANGES
POWERSUPPLYCHARACTERISTICS
Symbol
Parameter
Test Conditions(1)
Min.
Typ.(2)
Max.
Unit
∆ICC
Quiescent Power Supply Current
TTL Inputs HIGH
VCC = Max.
VIN = 3.4V(3)
—
0.5
2
mA
ICCD
Dynamic Power Supply
Current(4)
VCC = Max.
Outputs Open
OE = 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
50% Duty Cycle
OE = GND
One Bit Toggling
VIN = 3.4V
VIN = GND
VCC = Max.
Outputs Open
fo = 2.5MHz
VIN = VCC
VIN = GND
3.5(5)
7.5(5)
50% Duty Cycle
OE = 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 ∆ICC formula. These limits are guaranteed but not tested.
6. IC = IQUIESCENT + IINPUTS + IDYNAMIC
IC = ICC + ∆ICC DHNT + ICCD (fONO)
ICC = Quiescent Current
∆ICC = 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.
4
IDT54/74FCT257T/AT/CT/DT
MILITARYANDINDUSTRIALTEMPERATURERANGES
FASTCMOSQUAD2-INPUTMULTIPLEXER
SWITCHINGCHARACTERISTICSOVEROPERATINGRANGE-INDUSTRIAL
FCT257AT
FCT275CT
Min.(2)
Symbol
tPLH
Parameter
PropagationDelay
Ix to Zx
Condition(1)
CL = 50pF
RL = 500Ω
Min.(2)
Max.
Max.
Unit
1.5
1.5
1.5
1.5
5
1.5
1.5
1.5
1.5
4.3
1.5
1.5
1.5
1.5
3.9
ns
tPHL
tPLH
PropagationDelay
S to Zx
7
7
5.2
6
4.4
4.4
4.4
ns
ns
ns
tPHL
tPZH
tPZL
OutputEnableTime
tPHZ
tPLZ
OutputDisableTime
5.5
5
NOTES:
1. See test circuit and waveforms.
2. Minimum limits are guaranteed but not tested on Propagation Delays.
SWITCHINGCHARACTERISTICSOVEROPERATINGRANGE-MILITARY
FCT257T
Min.(2)
FCT275AT
Min.(2)
FCT275CT
Symbol
tPLH
Parameter
PropagationDelay
Ix to Zx
Condition(1)
CL = 50pF
RL = 500Ω
Max.
Max.
Min.(2)
Max.
Unit
1.5
1.5
1.5
1.5
7
1.5
1.5
1.5
1.5
5.8
1.5
1.5
1.5
1.5
5
ns
tPHL
tPLH
PropagationDelay
S to Zx
12
10
8
8.1
8
6
ns
ns
ns
tPHL
tPZH
tPZL
OutputEnableTime
6.8
5.3
tPHZ
tPLZ
OutputDisableTime
5.8
NOTES:
1. See test circuit and waveforms.
2. Minimum limits are guaranteed but not tested on Propagation Delays.
5
IDT54/74FCT257T/AT/CT/DT
FASTCMOSQUAD2-INPUTMULTIPLEXER
MILITARYANDINDUSTRIALTEMPERATURERANGES
TESTCIRCUITSANDWAVEFORMS
VCC
SWITCHPOSITION
7.0V
Test
Switch
Closed
Open
500Ω
Open Drain
Disable Low
Enable Low
VOUT
VIN
Pulse
Generator
D.U.T
.
All Other Tests
50pF
500Ω
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
Octal link
1.5V
0V
CLEAR
tSU
tH
CLOCK ENABLE
ETC.
Pulse Width
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
Octal link
0V
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.
6
IDT54/74FCT257T/AT/CT/DT
MILITARYANDINDUSTRIALTEMPERATURERANGES
FASTCMOSQUAD2-INPUTMULTIPLEXER
ORDERINGINFORMATION
IDT
XX
FCT
XXXX
XX
X
Temp. Range
Package
Process
Device Type
Blank
Industrial
B
MIL-STD-883, Class B
Industrial Options
Small Outline IC (300 mil)
Quarter-size Small Outline Package
SO
Q
Military Options
CERDIP
Leadless Chip Carrier
D
L
Quad 2-Input Multiplexer (3-State)
257T
257AT
257CT
257DT
54
74
– 55°C to +125°C
– 40°C to +85°C
CORPORATE HEADQUARTERS
2975StenderWay
Santa Clara, CA 95054
for SALES:
800-345-7015 or 408-727-6116
fax: 408-492-8674
for Tech Support:
logichelp@idt.com
(408) 654-6459
www.idt.com
7
相关型号：
©2020 ICPDF网 联系我们和版权申明