IDT74FCT257AT/CT/DT
FAST CMOS QUAD 2-INPUT MULTIPLEXER
INDUSTRIAL TEMPERATURE RANGE
FAST CMOS
QUAD 2-INPUT
MULTIPLEXER
DESCRIPTION:
FEATURES:
•
•
•
•
•
•
•
•
IDT74FCT257AT/CT/DT
OBSOLETE PART
The FCT257T is a high-speed quad 2-input multiplexer built using an
advanced dual metal CMOS 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.
The FCT257T has a common Output Enable (OE) input. When OE is
high, all outputs are switched to a high-impedance state allowing the outputs
to interface directly with bus-oriented systems.
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
R
T
O
R
F
A
P ED
E
D
T
S
N
E
N
E
L
G
M
O
I
S
M
S
B
E
O
O EC
D
R EW
T
N
O
N
FUNCTIONAL BLOCK DIAGRAM
S
Three other multiplexers
I1B I1D
Z B ZD
I0B I0D
I1A
ZA
I0A
OE
INDUSTRIAL TEMPERATURE RANGE
SEPTEMBER 2009
1
© 2009 Integrated Device Technology, Inc.
DSC-5500/7
IDT74FCT257AT/CT/DT
FAST CMOS QUAD 2-INPUT MULTIPLEXER
INDUSTRIAL TEMPERATURE RANGE
PIN CONFIGURATION
ABSOLUTE MAXIMUM RATINGS(1)
S
1
I0A
2
15
OE
I1A
3
14
I0C
ZA
4
13
I1C
I0B
5
12
ZC
I1B
6
11
I0D
ZB
7
10
I1D
GND
8
9
ZD
16
VCC
Symbol
Description
Max
Unit
VTERM(2)
Terminal Voltage with Respect to GND
–0.5 to +7
V
VTERM(3)
Terminal Voltage with Respect to GND
–0.5 to VCC+0.5
V
TSTG
Storage Temperature
–65 to +150
°C
IOUT
DC Output Current
–60 to +120
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.
2. Inputs and Vcc terminals only.
3. Output and I/O terminals only.
CAPACITANCE (TA = +25°C, F = 1.0MHz)
Parameter(1)
Symbol
Conditions
Typ.
Max.
Unit
CIN
Input Capacitance
VIN = 0V
6
10
pF
COUT
Output Capacitance
VOUT = 0V
8
12
pF
NOTE:
1. This parameter is measured at characterization but not tested.
SOIC/ QSOP
TOP VIEW
PIN DESCRIPTION
Pin Names
Description
I0A–I0D
Source 0 Data Inputs
I1A–I1D
Source 1 Data Inputs
Output Enable (Active LOW)
OE
S
Select Input
ZA–ZD
Outputs
FUNCTION TABLE(1)
Inputs
OE
S
I0
I1
Output Zx
H
X
X
X
Z
L
H
X
L
L
L
H
X
H
H
L
L
L
X
L
L
L
H
X
H
NOTE:
1. H = HIGH Voltage Level
L = LOW Voltage Level
X = Don’t Care
Z = High-Impedance
2
IDT74FCT257AT/CT/DT
FAST CMOS QUAD 2-INPUT MULTIPLEXER
INDUSTRIAL TEMPERATURE RANGE
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE
Following Conditions Apply Unless Otherwise Specified:
Industrial: TA = –40°C to +85°C, VCC = 5.0V ±5%
Symbol
Test Conditions(1)
Parameter
Min.
Typ.(2)
Max.
Unit
VIH
Input HIGH Level
Guaranteed Logic HIGH Level
2
—
—
V
VIL
Input LOW Level
Guaranteed Logic LOW Level
—
—
0.8
V
IIH
Input HIGH Current(4)
VCC = Max.
VI = 2.7V
—
—
±1
µA
IIL
Input LOW Current(4)
VCC = Max.
VI = 0.5V
—
—
±1
µA
IOZH
High Impedance Output Current
VCC = Max
VO = 2.7V
—
—
±1
µA
IOZL
(3-State output pins)(4)
VO = 0.5V
—
—
±1
II
VIK
VH
Input HIGH Current(4)
Clamp Diode Voltage
Input Hysteresis
VCC = Max., VI = VCC (Max.)
VCC = Min, IIN = -18mA
—
—
—
—
–0.7
200
±1
–1.2
—
µA
V
mV
ICC
Quiescent Power Supply Current
VCC = Max., VIN = GND or VCC
—
0.01
1
mA
Min.
2.4
2
—
Typ.(2)
3.3
3
0.3
Max.
—
—
0.5
Unit
V
–60
—
–120
—
–225
±1
mA
µA
—
OUTPUT DRIVE CHARACTERISTICS
Symbol
VOH
Parameter
Output HIGH Voltage
VOL
Output LOW Voltage
IOS
IOFF
Short Circuit Current
Input/Output Power Off Leakage(5)
Test Conditions(1)
IOH = –8mA
IOH = –15mA
IOL = 48mA
VCC = Min
VIN = VIH or VIL
VCC = Min
VIN = VIH or VIL
VCC = Max., VO = GND(3)
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
V
IDT74FCT257AT/CT/DT
FAST CMOS QUAD 2-INPUT MULTIPLEXER
INDUSTRIAL TEMPERATURE RANGE
POWER SUPPLY CHARACTERISTICS
Test Conditions(1)
Min.
Typ.(2)
Max.
Unit
—
0.5
2
mA
VIN = VCC
VIN = GND
—
0.15
0.25
mA/
MHz
VCC = Max.
Outputs Open
fo = 10MHz
VIN = VCC
VIN = GND
—
1.5
3.5
mA
50% Duty Cycle
OE = GND
One Bit Toggling
VIN = 3.4V
VIN = GND
—
1.8
4.5
VCC = Max.
Outputs Open
fo = 2.5MHz
VIN = VCC
VIN = GND
—
1.5
3.5(5)
50% Duty Cycle
OE = GND
Four Bits Toggling
VIN = 3.4V
VIN = GND
—
2.5
7.5(5)
Symbol
Parameter
ΔICC
Quiescent Power Supply Current
TTL Inputs HIGH
VCC = Max.
VIN = 3.4V(3)
ICCD
Dynamic Power Supply
Current(4)
VCC = Max.
Outputs Open
OE = GND
One Input Toggling
50% Duty Cycle
Total Power Supply Current(6)
IC
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.
SWITCHING CHARACTERISTICS OVER OPERATING RANGE
Symbol
tPLH
tPHL
tPLH
tPHL
tPZH
tPZL
tPHZ
tPLZ
Parameter
Propagation Delay
Ix to Zx
Propagation Delay
S to Zx
Output Enable Time
Condition(1)
CL = 50pF
RL = 500Ω
Output Disable Time
FCT257AT
Min.(2)
Max.
1.5
5
FCT275CT
Min.(2)
Max.
1.5
4.3
FCT275DT
Min.(2)
Max.
1.5
3.9
Unit
ns
1.5
7
1.5
5.2
1.5
4.4
ns
1.5
7
1.5
6
1.5
4.4
ns
1.5
5.5
1.5
5
1.5
4.4
ns
NOTES:
1. See test circuit and waveforms.
2. Minimum limits are guaranteed but not tested on Propagation Delays.
4
IDT74FCT257AT/CT/DT
FAST CMOS QUAD 2-INPUT MULTIPLEXER
INDUSTRIAL TEMPERATURE RANGE
TEST CIRCUITS AND WAVEFORMS
V CC
SWITCH POSITION
7.0V
500W
V OUT
VIN
Pulse
Generator
D.U.T
.
50pF
RT
500W
Test
Switch
Open Drain
Disable Low
Enable Low
Closed
All Other Tests
Open
DEFINITIONS:
CL = Load capacitance: includes jig and probe capacitance.
RT = Termination resistance: should be equal to ZOUT of the Pulse Generator.
CL
Octal Link
Test Circuits for All Outputs
DATA
INPUT
tH
tSU
TIMING
INPUT
ASYNCHRONOUS CONTROL
PRESET
CLEAR
ETC.
SYNCHRONOUS CONTROL
PRESET
CLEAR
CLOCK ENABLE
ETC.
tREM
tSU
3V
1.5V
0V
3V
1.5V
0V
LOW-HIGH-LOW
PULSE
1.5V
tW
3V
1.5V
0V
HIGH-LOW-HIGH
PULSE
1.5V
3V
1.5V
0V
tH
Pulse Width
Octal Link
Octal Link
Set-Up, Hold, and Release Times
ENABLE
SAME PHASE
INPUT TRANSITION
tPLH
tPHL
OUTPUT
tPLH
OPPOSITE PHASE
INPUT TRANSITION
tPHL
3V
1.5V
0V
VOH
1.5V
VOL
DISABLE
3V
1.5V
0V
CONTROL
INPUT
tPZL
OUTPUT
NORMALLY
LOW
3V
1.5V
0V
SWITCH
CLOSED
tPLZ
3.5V
1.5V
tPZH
OUTPUT
NORMALLY
HIGH
SWITCH
OPEN
3.5V
0.3V
VOL
tPHZ
0.3V
1.5V
0V
Octal Link
VOH
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.
5
IDT74FCT257AT/CT/DT
FAST CMOS QUAD 2-INPUT MULTIPLEXER
INDUSTRIAL TEMPERATURE RANGE
ORDERING INFORMATION
FCT
XX
XXXX
Temp. Range
Device Type
XX
Package
X
Process
Blank
Industrial
SOG
QG
Small Outline IC (300 mil) - Green
Quarter-size Small Outline Package - Green
257AT
257CT
257DT
Quad 2-Input Multiplexer (3-State)
74
40 C to +85 C
Datasheet Document History
09/29/2009
08/14/2015
09/03/2019
Pg. 6 Updated the ordering information by removing the "IDT" notation and non RoHS part.
PDN# CQ-15-04 issued. See IDT.com for PDN specifics.
Datasheet changed to Obsolete Status.
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for SALES:
800-345-7015 or 408-284-8200
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www.idt.com
6
for Tech Support:
logichelp@idt.com
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