IDT74FCT157TD [IDT]
FAST CMOS QUAD 2-INPUT MULTIPLEXER; FAST CMOS四2输入多路复用器
| 型号： | IDT74FCT157TD |
| 厂家： | 
INTEGRATED DEVICE TECHNOLOGY |
| 描述： | FAST CMOS QUAD 2-INPUT MULTIPLEXER |
| 文件： | 总7页 (文件大小：139K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
IDT54/74FCT157T/AT/CT/DT
IDT54/74FCT257T/AT/CT/DT
IDT54/74FCT2257T/AT/CT
FAST CMOS
QUAD 2-INPUT
MULTIPLEXER
Integrated Device Technology, Inc.
DESCRIPTION:
FEATURES:
The FCT157T, FCT257T/FCT2257T are high-speed quad
2-inputmultiplexersbuiltusinganadvanceddualmetalCMOS
technology. Four bits of data from two sources can be
selected using the common select input. The four buffered
outputs present the selected data in the true (non-inverting)
form.
• Common features:
– 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 FCT157T has a common, active-LOW, enable input.
When the enable input is not active, all four outputs are held
LOW. A common application of ‘FCT157T is to move data
from two different groups of registers to a common bus.
Another application is as a function generator. The ‘FCT157T
can generate any four of the 16 different functions of two
variables with one variable common.
– Meets or exceeds JEDEC standard 18 specifications
– Product available in Radiation Tolerant and Radiation
Enhanced versions
– Military product compliant to MIL-STD-883, Class B
and DESC listed (dual marked)
– Available in DIP, SOIC, SSOP, QSOP, CERPACK
and LCC packages
The FCT257T/FCT2257T have a common Output Enable
(OE) input. When OE is HIGH, all outputs are switched to a
high-impedancestateallowingtheoutputstointerfacedirectly
with bus-oriented systems.
• Features for FCT157T/257T:
– Std., A, C and D speed grades
– High drive outputs (-15mA IOH, 48mA IOL)
• Features for FCT2257T:
The FCT2257T has balanced output drive with current
limiting resistors. This offers low ground bounce, minimal
undershoot and controlled output fall times-reducing the need
for external series terminating resistors. FCT2xxxT parts are
plug-in replacements for FCTxxxT parts.
– Std., A, and C speed grades
– Resistor outputs (-15mA IOH, 12mA IOL Com.)
(-12mA IOH, 12mA IOL Mil.)
– Reduced system switching noise
FUNCTIONAL BLOCK DIAGRAM
PIN CONFIGURATIONS
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
S
I0A
Vcc
E or OE*
I0C
I1C
S
P16-1,
D16-1,
SO16-1,
SO16-7
&
1A
I
Z
A
157 Only
E
Z
C
I
I
0B
1B
3 other multiplexers
I0D
E16-1
I
1D
Z
B
1B 1D
I
Z
D
–I
GND
Z B–Z D
2537 drw 02
DIP/SOIC/QSOP/CERPACK
TOP VIEW
0B 0D
I
–I
1A
I
A
Z
INDEX
0A
I
3
2
20 19
18
1A
I
4
5
6
7
8
I0C
I1C
NC
ZC
I0D
1
257 Only OE
ZA
NC
I0B
I1B
17
16
15
14
L20-2
2537 drw 01
10 11 12 13
9
LCC
2537 drw 03
TOP VIEW
* E for FCT157, OE for FCT257/FCT2257.
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
MILITARY AND COMMERCIAL TEMPERATURE RANGES
JUNE 1996
1996 Integrated Device Technology, Inc.
6.6
2537/6
1
IDT54/74FCT157T/AT/CT/DT, IDT54/74FCT257T/AT/CT/DT- 2257T/AT/CT
FAST CMOS QUAD 2-INPUT MULTIPLEXER
MILITARY AND COMMERCIAL TEMPERATURE RANGES
PIN DESCRIPTION
FUNCTION TABLE(1)
Pin Names
I0A–I0D
I1A–I1D
E
Description
Inputs
Output ZN
157
Source 0 Data Inputs
/
S
X
H
H
L
I0
X
X
X
L
I1
X
L
257
Z
E OE
Source 1 Data Inputs
H
L
L
L
L
L
L
Enable Input (Active LOW)–FCT157T
L
OE
Output Enable (Active LOW)–FCT257T/2257T
H
X
X
H
L
H
S
Select Input
Outputs
L
ZA–ZD
L
H
H
H
2537 tbl 01
NOTE:
2537 tbl 02
1. H = HIGH Voltage Level
L = LOW Voltage Level
X = Don’t Care
Z = High Impedance
ABSOLUTE MAXIMUM RATINGS(1)
CAPACITANCE (TA = +25°C, f = 1.0MHz)
Symbol
Rating
Commercial
Military
Unit
Symbol
Parameter(1)
Conditions Typ. Max. Unit
(2)
VTERM
Terminal Voltage
with Respect to
GND
–0.5 to +7.0 –0.5 to +7.0
V
C
IN
Input
Capacitance
Output
V
IN = 0V
6
8
10
pF
COUT
VOUT = 0V
12
pF
(3)
VTERM
Terminal Voltage
with Respect to
GND
–0.5 to
–0.5 to
V
Capacitance
VCC +0.5
VCC +0.5
2537 lnk 04
NOTE:
1. This parameter is measured at characterization but not tested.
TA
Operating
0 to +70
–55 to +125 °C
Temperature
Temperature
Under Bias
Storage
TBIAS
TSTG
–55 to +125 –65 to +135 °C
–55 to +125 –65 to +150 °C
Temperature
Power Dissipation
PT
0.5
0.5
W
IOUT
DC Output
Current
–60 to +120 –60 to +120 mA
2537 lnk 03
NOTES:
1. Stresses greater than those listed under ABSOLUTE MAXIMUM RAT-
INGS may cause permanent damage to the device. This is a stress rating
onlyandfunctionaloperationofthedeviceattheseoranyotherconditions
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.
2. Input and VCC terminals only.
3. Outputs and I/O terminals only.
6.6
2
IDT54/74FCT157T/AT/CT/DT, IDT54/74FCT257T/AT/CT/DT - 2257T/AT/CT
FAST CMOS QUAD 2-INPUT MULTIPLEXER
MILITARY AND COMMERCIAL TEMPERATURE RANGES
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE
Following Conditions Apply Unless Otherwise Specified:
Commercial: TA = 0°C to +70°C, VCC = 5.0V ± 5%; Military: TA = –55°C to +125°C, VCC = 5.0V ± 10%
Symbol
Parameter
Input HIGH Level
Test Conditions(1)
Min. Typ.(2) Max.
Unit
VIH
Guaranteed Logic HIGH Level
2.0
—
—
—
—
—
—
—
—
—
—
—
—
V
VIL
Input LOW Level
Guaranteed Logic LOW Level
0.8
V
I
I
I
I
I
I H
I L
Input HIGH Current(4)
Input LOW Current(4)
High Impedance Output Current
(3-State Output pins)(4)
Input HIGH Current(4)
Clamp Diode Voltage
Input Hysteresis
V
CC = Max.
CC = Max.
CC = Max., V
V
V
V
V
I
I
= 2.7V
= 0.5V
—
±1
±1
±1
±1
±1
µA
µA
µA
—
OZH
OZL
I
V
O
O
= 2.7V
= 0.5V
—
—
V
V
I
= VCC (Max.)
—
V
IK
H
CC = Min., IIN = –18mA
—
–0.7
200
0.01
–1.2
—
V
V
mV
mA
I
CC
Quiescent Power Supply Current
V
CC = Max., VIN = GND or VCC
1
2537 lnk 05
OUTPUT DRIVE CHARACTERISITICS FOR FCT157/257T
Symbol
Parameter
Test Conditions(1)
Min. Typ.(2) Max.
Unit
V
OH
Output HIGH Voltage
V
CC = Min.
I
I
I
I
I
I
OH = –6mA MIL.
2.4
2.0
—
3.3
3.0
0.3
—
V
VIN = VIH or VIL
OH = –8mA COM'L.
OH = –12mA MIL.
OH = –15mA COM'L.
OL = 32mA MIL.
—
V
V
V
OL
Output LOW Voltage
V
V
V
CC = Min.
IN = VIH or VIL
0.50
OL = 48mA COM'L.
IOS
Short Circuit Current
Input/Output Power Off Leakage(5)
CC = Max., V
O
= GND(3)
–60
—
–120 –225
mA
IOFF
VCC = 0V, VIN or V
O
≤
4.5V
—
±1
µA
2537 tbl 06
OUTPUT DRIVE CHARACTERISTICS FOR FCT2257T
Symbol
Parameter
Test Conditions(1)
Min. Typ.(2) Max.
Unit
I
I
ODL
Output LOW Current
V
CC = 5V, VIN = VIH or VIL,
CC = 5V, VIN = VIH or VIL,
V
V
OUT= 1.5V(3)
16
–16
2.4
48
–48
3.3
—
—
—
mA
ODH
Output HIGH Current
Output HIGH Voltage
V
OUT= 1.5V(3)
mA
V
V
OH
OL
V
V
V
V
CC = Min.
I
I
I
OH = –12mA MIL.
OH = –15mA COM'L.
OL = 12mA
IN = VIH or VIL
CC = Min.
V
Output LOW Voltage
—
0.3
0.50
V
IN = VIH or VIL
2537 lnk 07
NOTES:
1. For conditions shown as Max. or Min., 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 shorted at one time. Duration of the short circuit 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.
6.6
3
IDT54/74FCT157T/AT/CT/DT, IDT54/74FCT257T/AT/CT/DT- 2257T/AT/CT
FAST CMOS QUAD 2-INPUT MULTIPLEXER
MILITARY AND COMMERCIAL TEMPERATURE RANGES
POWER SUPPLY CHARACTERISTICS
Symbol
Parameter
Quiescent Power Supply Current
TTL Inputs HIGH
Test Conditions(1)
Min. Typ.(2) Max.
Unit
∆ICC
VCC = Max.
VIN = 3.4(3)
—
0.5
2.0
mA
ICCD
Dynamic Power Supply Current(4) VCC = Max.
VIN = VCC
VIN = GND
FCTxxxT
—
0.15
0.25
mA/
MHz
Outputs Open
E or OE = GND
One Bit Toggling
50% Duty Cycle
VCC = Max.
FCT2xxxT
FCTxxxT
—
0.06
0.12
IC
Total Power Supply Current(6)
VIN = VCC
—
—
1.5
0.6
3.5
2.2
mA
Outputs Open
fO = 10MHz
VIN = GND FCT2xxxT
50% Duty Cycle
E or OE = GND
One Bit Toggling
VCC = Max.
VIN = 3.4
FCTxxxT
—
—
1.8
4.5
VIN = GND FCT2xxxT
VIN = VCC FCTxxxT
VIN = GND FCT2xxxT
0.9
1.5
0.6
3.2
3.5(5)
2.2(5)
Outputs Open
fO = 2.5MHz
50% Duty Cycle
E or OE = GND
Four Bits Toggling
VIN = 3.4
FCTxxxT
2.5
1.6
7.5(5)
6.2(5)
VIN = GND FCT2xxxT
2537 tbl 06
NOTES:
1. For conditions shown as Max. or Min., 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 the 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 Output 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.
6.6
4
IDT54/74FCT157T/AT/CT/DT, IDT54/74FCT257T/AT/CT/DT - 2257T/AT/CT
FAST CMOS QUAD 2-INPUT MULTIPLEXER
MILITARY AND COMMERCIAL TEMPERATURE RANGES
SWITCHING CHARACTERISTICS OVER OPERATING RANGE - FCT157T
FCT157T
FCT157AT
Com'l.
Mil.
Com'l.
Min.(2)
Max.
Mil.
Symbol
Parameter
Propagation Delay I
Condition(1)
= 50pF
= 500
Min.(2)
Max.
Min.(2)
Max.
Min.(2)
Max.
Unit
tPLH
tPHL
tPLH
tPHL
tPLH
tPHL
N
to Z
N
C
L
1.5
1.5
1.5
6.0
1.5
7.0
1.5
1.5
1.5
5.0
6.0
7.0
1.5
5.8
ns
R
L
Ω
Propagation Delay E to Z
N
10.5
10.5
1.5
1.5
12.0
12.0
1.5
1.5
7.4
8.1
ns
Propagation Delay S to Z
N
ns
2537 tbl 07
FCT157CT
FCT157DT
Com'l.
Mil.
Com'l.
Mil.
Symbol
Parameter
Condition(1)
= 50pF
= 500
Min.(2)
Max.
Min.(2)
Max.
Min.(2)
Max.
Min.(2)
Max.
Unit
tPLH
tPHL
tPLH
tPHL
tPLH
tPHL
Propagation Delay I
Propagation Delay E to Z
Propagation Delay S to Z
N
to Z
N
C
L
1.5
4.3
1.5
5.0
1.5
3.9
—
—
ns
R
L
Ω
N
1.5
1.5
4.8
5.2
1.5
1.5
5.9
6.0
1.5
1.5
4.4
4.6
—
—
—
—
ns
N
ns
2537 tbl 08
SWITCHING CHARACTERISTICS OVER OPERATING RANGE – FCT257/2257T
FCT257/2257T
FCT257/2257AT
Com'l.
Mil.
Com'l. Mil.
Symbol
Parameter
Condition(1)
CL = 50pF
RL = 500Ω
Min.(2)
Max.
Min.(2)
Max.
Min.(2)
Max.
Min.(2)
Max.
Unit
tPLH
tPHL
tPLH
tPHL
tPZH
tPZL
tPHZ
tPLZ
Propagation Delay IN to ZN
1.5
1.5
1.5
1.5
6.0
1.5
7.0
1.5
1.5
1.5
1.5
5.0
1.5
5.8
ns
Propagation Delay S to ZN
Output Enable Time
10.5
8.5
1.5
1.5
1.5
12.0
10.0
8.0
7.0
7.0
5.5
1.5
1.5
1.5
8.1
8.0
5.8
ns
ns
Output Disable Time
6.0
ns
2537 tbl 09
FCT257/2257CT
Com'l. Mil.
FCT257DT
Com'l.
Mil.
Symbol
Parameter
Condition(1)
CL = 50pF
RL = 500Ω
Min.(2)
Max.
Min.(2)
Max.
Min.(2)
Max.
Min.(2)
Max.
Unit
tPLH
tPHL
Propagation Delay IN to ZN
1.5
4.3
1.5
5.0
1.5
3.9
—
—
ns
tPLH
Propagation Delay S to ZN
Output Enable Time
1.5
1.5
1.5
5.2
6.0
5.0
1.5
1.5
1.5
6.0
6.8
5.3
1.5
1.5
1.5
4.4
4.4
4.4
—
—
—
—
—
—
ns
ns
tPHL
tPZH
tPZL
tPHZ
Output Disable Time
ns
tPLZ
NOTES:
2537 tbl 10
1. See test circuits and waveforms.
2. Minimum limits are guaranteed but not tested on Propagation Delay.
6.6
5
IDT54/74FCT157T/AT/CT/DT, IDT54/74FCT257T/AT/CT/DT- 2257T/AT/CT
FAST CMOS QUAD 2-INPUT MULTIPLEXER
MILITARY AND COMMERCIAL TEMPERATURE RANGES
TEST CIRCUITS AND WAVEFORMS
TEST CIRCUITS FOR ALL OUTPUTS
SWITCH POSITION
Test
Switch
VCC
7.0V
Open Drain
Disable Low
Closed
500
Ω
Ω
Enable Low
VOUT
VIN
Open
Pulse
Generator
All Other Tests
DEFINITIONS:
CL= Load capacitance: includes jig and probe capacitance.
D.U.T.
2537 lnk 11
50pF
500
T
R
RT = Termination resistance: should be equal to ZOUT of the Pulse
C
L
Generator.
2537 drw 04
SET-UP, HOLD AND RELEASE TIMES
PULSE WIDTH
3V
DATA
1.5V
0V
INPUT
LOW-HIGH-LOW
t
H
tSU
1.5V
PULSE
3V
1.5V
0V
TIMING
INPUT
ASYNCHRONOUS CONTROL
tW
t
REM
PRESET
CLEAR
ETC.
3V
1.5V
0V
HIGH-LOW-HIGH
PULSE
1.5V
SYNCHRONOUS CONTROL
PRESET
3V
2537 drw 06
1.5V
0V
CLEAR
tSU
t
H
CLOCK ENABLE
ETC.
2537 drw 05
PROPAGATION DELAY
ENABLE AND DISABLE TIMES
ENABLE
DISABLE
3V
1.5V
0V
3V
SAME PHASE
CONTROL
INPUT
1.5V
0V
INPUT TRANSITION
t
PLH
t
t
PHL
PHL
t
PZL
tPLZ
VOH
OUTPUT
3.5V
1.5V
3.5V
1.5V
OUTPUT
NORMALLY
LOW
SWITCH
CLOSED
VOL
t
PLH
0.3V
0.3V
VOL
3V
1.5V
0V
tPZH
tPHZ
OPPOSITE PHASE
INPUT TRANSITION
VOH
OUTPUT
NORMALLY
HIGH
SWITCH
OPEN
1.5V
0V
2537 drw 07
0V
2537 drw 08
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
6.6
6
IDT54/74FCT157T/AT/CT/DT, IDT54/74FCT257T/AT/CT/DT - 2257T/AT/CT
FAST CMOS QUAD 2-INPUT MULTIPLEXER
MILITARY AND COMMERCIAL TEMPERATURE RANGES
ORDERING INFORMATION
X
X
IDT
X
XXXX
XX
FCT
Family Device
Type
Package Process
Temperature
Range
Blank
B
Commercial
MIL-STD-883, Class B
P
Plastic DIP
D
CERDIP
SO
L
E
Q
Small Outline IC
Leadless Chip Carrier
CERPACK
Quarter-size Small Outline Package
157T
257T
Quad 2-Input Multiplexer
Quad 2-Input Multiplexer (3-state)
157AT
257AT
157CT
257CT
157DT
257DT
Blank High Drive
2
Balanced Drive
54
74
–55°C to +125°C
0°C to +70°C
2537 drw 09
6.6
7
相关型号：
IDT74FCT157TDC
Multiplexer, FCT Series, 4-Func, 2 Line Input, 1 Line Output, True Output, CMOS, PDSO16, 0.150 INCH, SOIC-16
IDT
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