IDT IDT54FCT257T, IDT54FCT257AT, IDT54FCT257CT, IDT54FCT257DT, IDT74FCT257T User Manual
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IDT54/74FCT257T/AT/CT/DT
FAST CMOS QUAD 2-INPUT MULTIPLEXER
MILITARY AND INDUSTRIAL TEMPERATURE RANGES
FAST CMOS
QUAD 2-INPUT
MULTIPLEXER
FEA TURES:
• Std., A, C, and D grades
• Low input and output leakage
• 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
• 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
FUNCTIONAL BLOCK DIAGRAM
≤≤
≤1µA (max.)
≤≤
IDT54/74FCT257T/AT/CT/DT
DESCRIPTION:
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.
I
1BI1D
I
0BI0D
I
I
1A
0A
S
OE
Three other multiplexers
ZBZ
Z
A
D
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
JUNE 2001MILITARY AND INDUSTRIAL TEMPERATURE RANGES
1
© 2002 Integrated Device Technology, Inc. DSC-5500/2
IDT54/74FCT257T/AT/CT/DT
FAST CMOS QUAD 2-INPUT MULTIPLEXER
PIN CONFIGURATION
MILITARY AND INDUSTRIAL TEMPERATURE RANGES
S
0A
I
I1A
ZA
I0B
I1B
Z
B
GND
1
2
3
4
5
6
7
8
CERDIP/ SOIC/ QSOP
TOP VIEW
16
15
14
13
12
11
10
INDEX
A
0
S
I
C
N
C
C
V
E
O
VCC
OE
0C
I
I1A
ZA
4
5
23
1
1920
18
17
I
0C
I1C
I1C
NC
6
16
NC
ZC
0B
I
7
15
ZC
I0D
I1B
I1D
9
ZD
8
10 11 12 13
9
B
Z
D
N
C
N
14
D
D
1
Z
I
I0D
G
LCC
TOP VIEW
ABSOLUTE MAXIMUM RATINGS
Symbol Description Max Unit
(2)
VTERM
VTERM
TSTG Storage Temperature –65 to +150 °C
I
OUT 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.
Terminal Voltage with Respect to GND –0.5 to +7 V
(3)
Terminal Voltage with Respect to GND –0.5 to VCC+0.5 V
(1)
CAPACITANCE (TA = +25°C, F = 1.0MHz)
Symbol Parameter
CIN Input Capacitance VIN = 0V 6 10 pF
C
OUT Output Capacitance VOUT = 0V 8 12 pF
NOTE:
1. This parameter is measured at characterization but not tested.
(1)
Conditions Typ. Max. Unit
PIN DESCRIPTION
Pin Names Description
I0A–I0D Source 0 Data Inputs
I1A–I1D Source 1 Data Inputs
OE Output Enable (Active LOW)
S Select Input
ZA–ZD Outputs
FUNCTION TABLE
Inputs
OE SI0 I1 Output Zx
HXXX Z
LHXL L
LHXH H
LLLX L
LLHX H
NOTE:
1. H = HIGH Voltage Level
L = LOW Voltage Level
X = Don’t Care
Z = High-Impedance
(1)
2
IDT54/74FCT257T/AT/CT/DT
FAST CMOS QUAD 2-INPUT MULTIPLEXER
MILITARY AND INDUSTRIAL TEMPERATURE RANGES
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE
Following Conditions Apply Unless Otherwise Specified:
Industrial: TA = –40°C to +85°C, VCC = 5.0V ±5%; Military: TA = –55°C to +125°C, VCC = 5.0V ±10%
Symbol Parameter Test Conditions
(1)
Min. Typ.
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
IIL Input LOW Current
OZH High Impedance Output Current VCC = Max VO = 2.7V — — ±1µA
I
IOZL (3-State output pins)
II Input HIGH Current
(4)
(4)
(4)
(4)
VCC = Max. VI = 2.7V — — ±1µA
VCC = Max. VI = 0.5V — — ±1µA
VO = 0.5V — — ±1
VCC = Max., VI = VCC (Max.) — — ±1µA
VIK Clamp Diode Voltage VCC = Min, IIN = -18mA — –0.7 –1.2 V
VH Input Hysteresis — — 200 — mV
I
CC Quiescent Power Supply Current VCC = Max., VIN = GND or VCC — 0.01 1 mA
(2)
Max. Unit
OUTPUT DRIVE CHARACTERISTICS
Symbol Parameter Test Conditions
V
OH Output HIGH Voltage VCC = Min IOH = –8mA 2.4 3.3 — V
(1)
Min. Typ.
VIN = VIH or VIL IOH = –15mA 2 3 —
VOL Output LOW Voltage VCC = Min IOL = 48mA — 0.3 0.5 V
VIN = VIH or VIL
IOS Short Circuit Current VCC = Max., VO = GND
IOFF Input/Output Power Off Leakage
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.
(5)
VCC = 0V, VIN or VO
(3)
≤≤
≤
4.5V — — ±1µA
≤≤
–60 –120 –225 mA
(2)
Max. Unit
3
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