1
IDT74FCTL2257T
HIGH-SPEED CMOS QUAD 2-INPUT MULTIPLEXER
EXTENDED COMMERCIAL TEMPERATURE RANGE
SEPTEMBER 1999
1999 Integrated Device Technology, Inc.
DSC-5402/-
c
IDT74FCTL2257T
EXTENDED COMMERCIAL TEMPERATURE RANGE
HIGH-SPEED CMOS
QUAD 2-INPUT
MULTIPLEXER
DESCRIPTION:
The IDT74FCTL2257T is a 25
resistor output version of a high-speed
CMOS TTL-compatible, quad, 2-input multiplexer, useful for driving trans-
mission lines and reducing system noise. All inputs have clamp diodes for
undershoot noise suppression. All outputs have ground bounce suppres-
sion. Outputs will not load an active bus when Vcc is removed from the
device.
FUNCTIONAL BLOCK DIAGRAM
25
ZA
25
ZB
25
ZC
25
ZD
O E
S
I0A
I1A
I0B
I1B
I0C
I1C
I0D
I1D
15
1
2
3
5
6
14
13
11
10
4
7
1 2
9
FEATURES:
-
Pin and function compatible to the Quality QS74FCT Family
-
Extended commercial range of 40C to +85C
-
CMOS power levels: <7.5mW static
-
Available in PDIP, SOIC and QSOP packages
-
Undershoot clamp diodes on all inputs
-
True TTL input and output compatibility
-
Ground bounce controlled outputs
-
Reduced output swing of 0 to 3.5V
-
Built-in 25
series resistor outputs reduce reflection and other
system noise
-
Std., A and C speed grades with 4.3ns for C
-
I
OL
= 12mA
2
EXTENDED COMMERCIAL TEMPERATURE RANGE
IDT74FCTL2257T
HIGH-SPEED CMOS QUAD 2-INPUT MULTIPLEXER
PIN CONFIGURATION
PDIP/ SOIC/ QSOP
TOP VIEW
P16-1
SO16-1
SO16-7
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
1
S
I
0A
GND
ZB
I
0B
I
1B
I
1A
OE
I
0D
I
1D
Z
D
I
0C
I
1C
ZC
V
CC
Z
A
ABSOLUTE MAXIMUM RATINGS
(1)
Symbol
Description
Max.
Unit
V
TERM(2)
Terminal Voltage with Respect to GND
0.5 to +7
V
V
TERM(3)
Terminal Voltage with Respect to GND
0.5 to +7
V
T
STG
Storage Temperature
65 to +150
C
I
OUT
DC Output Current
120
mA
I
IK
Continuous Clamp Current,
20
mA
I
OK
V
I
< 0 or V
O
< 0
50
mA
FCTL
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.
2. V
CC
terminals.
3. All terminals except V
CC
.
CAPACITANCE (T
A
= +25
O
C, f = 1.0MHz)
Symbol
Parameter
(1)
Conditions
Typ.
Max.
Unit
C
IN
Input Capacitance
V
IN
= 0V
6
10
pF
C
OUT
Output Capacitance
V
OUT
= 0V
8
12
pF
FCTL
NOTE:
1. This parameter is measured at characterization but not tested.
PIN DESCRIPTION
Pin Names
Description
I
0A
- I
0D
Source O Data Inputs
I
1A
- I
1D
Source I Data Inputs
OE
Enable Input (Active LOW)
S
Select Input
Z
A
- Z
D
Outputs
FUNCTION TABLE
(1)
Inputs
OE
S
I
0
I
1
Outputs
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
X = Don't Care
L = Low Voltage Level
Z = High-Impedance
3
IDT74FCTL2257T
HIGH-SPEED CMOS QUAD 2-INPUT MULTIPLEXER
EXTENDED COMMERCIAL TEMPERATURE RANGE
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE
Following Conditions Apply Unless Otherwise Specified:
Extended Commercial: T
A
= -40C to +85C, V
CC
= 5.0V 5%
Symbol
Parameter
Test Conditions
(1)
Min.
Typ.
(2)
Max.
Unit
V
IH
Input HIGH Level
Guaranteed Logic HIGH Level
2
--
--
V
V
IL
Input LOW Level
Guaranteed Logic LOW Level
--
--
0.8
V
V
T
Input Hysteresis
V
TLH
- V
THL
for all inputs
--
0.2
--
V
I
IH
Input HIGH Current
V
CC
= Max.
0
V
IN
< Vcc
--
--
5
A
I
IL
Input LOW Current
I
OZ
Off-State Output Current (Hi-Z)
V
CC
= Max.
0
V
IN
Vcc
--
--
5
A
I
OR
Current Drive
V
CC
= Max., V
OUT
= 2.0V
(2)
50
--
--
mA
V
IC
Input Clamp Voltage
V
CC
= Min., I
IN
= 18mA, T
A
= 25
C
--
0.7
1.2
V
V
OH
Output HIGH Voltage
V
CC
= Min.
I
OH
= -15mA
2.4
--
--
V
V
OL
Output LOW Voltage (25
)
V
CC
= Min.
I
OL
= 12mA
--
--
0.5
V
R
OUT
Output Resistance (25
)
V
CC
= Min.
I
OL
= 12mA
20
28
40
NOTES:
1. Typical values are at V
CC
= 5.0V, T
A
= 25C.
2. Not more than one output should be shorted at one time. Duration of the short circuit test should not exceed one second.
POWER SUPPLY CHARACTERISTICS
Following Conditions Apply Unless Otherwise Specified:
Extended Commercial:
T
A
= -40C to +85C, V
CC
= 5.0V 5%
Symbol
Parameter
Test Conditions
(1)
Min.
Max.
Unit
I
CC
Quiescent Power Supply Current
V
CC
= Max.
freq = 0
0V
V
IN
0.2V or
Vcc-0.2V
V
IN
Vcc
--
1.5
mA
I
CC
Supply Current per Input TTL Inputs HIGH
V
CC
= Max.
V
IN
= 3.4V
(2)
freq = 0
--
2
mA
I
CCD
Supply Current per Input per MHz
V
CC
= Max.
Outputs Open and Enabled
One Bit Toggling
50% Duty Cycle
Other inputs at GND or Vcc
(3,4)
--
0.25
mA/MHz
FCTL
NOTES:
1. For conditions shown as Min. or Max., use the appropriate values specified under DC Electrical Characteristics.
2. Per TLL driven input (V
IN
= 3.4V).
3. For flip-flops, Q
CCD
is measured by switching one of the data input pins so that the output changes every clock cycle. This is a measurement of
device power consumption only and does not include power to drive load capacitance or tester capacitance.
4. I
C
= I
QUIESCENT
+ I
INPUTS
+ I
DYNAMIC
I
C
= I
CC
+
I
CC
D
H
N
T
+ I
CCD
(f
CP
/2 + f
i
N
i
)
I
CC
= Quiescent Current
I
CC
= Power Supply Current for a TTL High Input (V
IN
= 3.4V)
D
H
= Duty Cycle for TTL Inputs High
N
T
= Number of TTL Inputs at D
H
I
CCD
= Dynamic Current Caused by an Output Transition Pair (HLH or LHL)
f
CP
= Clock Frequency for Register Devices (Zero for Non-Register Devices)
f
i
= Input Frequency
N
i
= Number of Inputs at f
i
All currents are in milliamps and all frequencies are in megahertz.
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EXTENDED COMMERCIAL TEMPERATURE RANGE
IDT74FCTL2257T
HIGH-SPEED CMOS QUAD 2-INPUT MULTIPLEXER
SWITCHING CHARACTERISTICS OVER OPERATING RANGE
(1)
Following Conditions Apply Unless Otherwise Specified:
Extended Commercial: T
A
= -40C to +85C, V
CC
= 5.0V 5%
74FCTL2257T
74FCTL2257AT
74FCTL2257CT
Symbol
Parameter
Min.
Max.
Min.
Max.
Min.
Max.
Unit
t
PLH
t
PHL
Propagation Delay
Ixx to Zx
1.5
6
1.5
5
1.5
4.3
ns
t
PLH
t
PHL
Propagation Delay
S to Zx
1.5
10.5
1.5
7
1.5
5.2
ns
t
PZH
t
PZL
Output Enable Time
OE to Zx
1.5
8.5
1.5
7
1.5
6
ns
t
PHZ
t
PLZ
Output Disable Time
OE to Zx
1.5
6
1.5
5.5
1.5
5
ns
NOTES:
1. C
LOAD
= 50pF, R
LOAD
= 500
unless otherwise noted.
5
IDT74FCTL2257T
HIGH-SPEED CMOS QUAD 2-INPUT MULTIPLEXER
EXTENDED COMMERCIAL TEMPERATURE RANGE
Pulse
Generator
R
T
D.U.T.
V
CC
V
IN
C
L
V
OUT
50pF
500
500
7.0V
3V
1.5V
0V
3V
1.5V
0V
3V
1.5V
0V
3V
1.5V
0V
DATA
IN PU T
TIM IN G
IN PU T
ASYN CH R ON OUS C ON TROL
PRES ET
CLEAR
ETC.
SYNC HRO N OU S CON TRO L
t
SU
t
H
t
REM
t
SU
t
H
HIGH-LOW -HIGH
PULSE
LO W -H IGH -LOW
PULSE
t
W
1.5V
1.5V
SAM E PHASE
IN PU T TR ANSITION
3V
1.5V
0V
1.5V
V
OH
t
PLH
OU TPUT
OPPOSITE P HASE
IN PU T TR ANSITION
3V
1.5V
0V
t
PLH
t
PH L
t
PH L
V
OL
CO NTR OL
IN PU T
3V
1.5V
0V
3.5V
0V
OU TPUT
NO RM A LLY
LO W
OU TPUT
NO RM A LLY
HIGH
SW ITC H
CLOSE D
SW ITC H
OPEN
V
OL
0.3V
0.3V
t
PLZ
t
PZL
t
PZH
t
PHZ
3.5V
0V
1.5V
1.5V
ENAB LE
DISA BLE
V
OH
PRES ET
CLEAR
CLOC K ENABLE
ETC.
O ctal lin k
O ctal lin k
O ctal lin k
O ctal lin k
O ctal lin k
TEST CIRCUITS AND WAVEFORMS
PROPAGATION DELAY
TEST CIRCUITS FOR ALL OUTPUTS
ENABLE AND DISABLE TIMES
SET-UP, HOLD, AND RELEASE TIMES
PULSE WIDTH
NOTES:
1. Diagram shown for input Control Enable-LOW and input Control Disable-
HIGH
2. Pulse Generator for All Pulses: Rate
1.0MHz; t
F
2.5ns; t
R
2.5ns
SWITCH POSITION
Test
Switch
Open Drain
Disable Low
Closed
Enable Low
All Other Tests
Open
FCTL
DEFINITIONS:
C
L
= Load capacitance: includes jig and probe capacitance.
R
T
= Termination resistance: should be equal to Z
OUT
of the Pulse
Generator.
6
EXTENDED COMMERCIAL TEMPERATURE RANGE
IDT74FCTL2257T
HIGH-SPEED CMOS QUAD 2-INPUT MULTIPLEXER
CORPORATE HEADQUARTERS
for SALES:
2975 Stender Way
800-345-7015 or 408-727-6116
Santa Clara, CA 95054
fax: 408-492-8674
www.idt.com*
*To search for sales office near you, please click the sales button found on our home page or dial the 800# above and press 2.
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
ORDERING INFORMATION
IDT
XX
FCTL
XXXX
XX
Package
Device Type
P
SO
Q
Plastic DIP (P16-1)
Small Outline IC (gull wing) (SO16-1)
Quarter Size Small Outline Package (SO16-7)
High-Speed CMOS Quad 2-Input Multiplexer
2257T
2257AT
2257CT
Temp. Range
74
40C to +85C
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