IDT IDT54FCT157T, IDT54FCT157AT, IDT54FCT157CT, IDT54FCT157DT, IDT54FCT257T User Manual
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IDT54FCT157ATD
FAST CMOS |
IDT54/74FCT157T/AT/CT/DT |
QUAD 2-INPUT |
IDT54/74FCT257T/AT/CT/DT |
MULTIPLEXER |
IDT54/74FCT2257T/AT/CT |
|
Integrated Device Technology, Inc.
FEATURES:
•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.)
–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
•Features for FCT157T/257T:
–Std., A, C and D speed grades
–High drive outputs (-15mA IOH, 48mA IOL)
•Features for FCT2257T:
–Std., A, and C speed grades
– |
Resistor outputs (-15mA IOH, 12mA IOL Com.) |
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(-12mA IOH, 12mA IOL Mil.) |
– |
Reduced system switching noise |
DESCRIPTION:
The FCT157T, FCT257T/FCT2257T are high-speed quad 2-input multiplexers 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 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.
The FCT257T/FCT2257T have 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.
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.
FUNCTIONAL BLOCK DIAGRAM |
PIN CONFIGURATIONS |
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S |
157 Only |
E |
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3 other multiplexers |
I1B –I1D |
Z B–Z D |
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I0B –I0D |
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I1A |
Z A |
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I0A |
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257 Only |
OE |
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2537 drw 01 |
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
S |
1 |
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16 |
Vcc |
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I0A |
2 |
P16-1, |
15 |
E or OE* |
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I1A |
3 |
14 |
I0C |
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D16-1, |
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ZA |
4 |
13 |
I1C |
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SO16-1, |
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I0B |
5 |
SO16-7 |
12 |
ZC |
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I1B |
6 |
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& |
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11 |
I0D |
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ZB |
7 |
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E16-1 |
10 |
I1D |
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GND |
8 |
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9 |
ZD |
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DIP/SOIC/QSOP/CERPACK |
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TOP VIEW |
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S |
NC Vcc |
OE* |
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INDEX |
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I |
Eor |
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0A |
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I1A |
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3 |
2 |
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20 19 |
I0C |
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4 |
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18 |
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1 |
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ZA |
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I1C |
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5 |
L20-2 |
17 |
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NC |
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6 |
16 |
NC |
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I0B |
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7 |
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15 |
ZC |
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I1B |
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8 |
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14 |
I0D |
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9 |
10 11 12 13 |
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ZB |
GND |
NC Z |
I1D |
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D |
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LCC
TOP VIEW
* E for FCT157, OE for FCT257/FCT2257.
2537 drw 02
2537 drw 03
MILITARY AND COMMERCIAL TEMPERATURE RANGES |
JUNE 1996 |
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©1996 Integrated Device Technology, Inc. |
6.6 |
2537/6 |
1
IDT54/74FCT157T/AT/CT/DT, IDT54/74FCT257T/AT/CT/DT2257T/AT/CT |
|
FAST CMOS QUAD 2-INPUT MULTIPLEXER |
MILITARY AND COMMERCIAL TEMPERATURE RANGES |
PIN DESCRIPTION
Pin Names |
Description |
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I0A–I0D |
Source 0 Data Inputs |
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I1A–I1D |
Source 1 Data Inputs |
E |
Enable Input (Active LOW)–FCT157T |
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OE |
Output Enable (Active LOW)–FCT257T/2257T |
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S |
Select Input |
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ZA–ZD |
Outputs |
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2537 tbl 01 |
FUNCTION TABLE(1)
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Inputs |
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Output ZN |
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E/OE |
S |
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I0 |
I1 |
157 |
257 |
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H |
X |
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X |
X |
L |
Z |
L |
H |
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X |
L |
L |
L |
L |
H |
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X |
H |
H |
H |
L |
L |
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L |
X |
L |
L |
L |
L |
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H |
X |
H |
H |
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NOTE: |
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2537 tbl 02 |
1.H = HIGH Voltage Level L = LOW Voltage Level X = Don’t Care
Z = High Impedance
ABSOLUTE MAXIMUM RATINGS(1)
Symbol |
Rating |
Commercial |
Military |
Unit |
VTERM(2) |
Terminal Voltage |
–0.5 to +7.0 |
–0.5 to +7.0 |
V |
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with Respect to |
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GND |
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VTERM(3) |
Terminal Voltage |
–0.5 to |
–0.5 to |
V |
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with Respect to |
VCC +0.5 |
VCC +0.5 |
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GND |
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TA |
Operating |
0 to +70 |
–55 to +125 |
°C |
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Temperature |
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TBIAS |
Temperature |
–55 to +125 |
–65 to +135 |
°C |
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Under Bias |
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TSTG |
Storage |
–55 to +125 |
–65 to +150 |
°C |
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Temperature |
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PT |
Power Dissipation |
0.5 |
0.5 |
W |
IOUT |
DC Output |
–60 to +120 |
–60 to +120 |
mA |
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Current |
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NOTES: |
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2537 lnk 03 |
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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.Input and VCC terminals only.
3.Outputs and I/O terminals only.
CAPACITANCE (TA = +25°C, f = 1.0MHz)
Symbol |
Parameter(1) |
Conditions |
Typ. |
Max. |
Unit |
CIN |
Input |
VIN = 0V |
6 |
10 |
pF |
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Capacitance |
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COUT |
Output |
VOUT = 0V |
8 |
12 |
pF |
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Capacitance |
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NOTE: |
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2537 lnk 04 |
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1. This parameter is measured at characterization but not tested.
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 |
|
Test Conditions(1) |
Min. |
Typ.(2) |
Max. |
Unit |
VIH |
Input HIGH Level |
Guaranteed Logic HIGH Level |
2.0 |
— |
— |
V |
|
VIL |
Input LOW Level |
Guaranteed Logic LOW Level |
— |
— |
0.8 |
V |
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II H |
Input HIGH Current(4) |
VCC = Max. |
VI = 2.7V |
— |
— |
±1 |
μA |
II L |
Input LOW Current(4) |
|
VI = 0.5V |
— |
— |
±1 |
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IOZH |
High Impedance Output Current |
VCC = Max. |
VO = 2.7V |
— |
— |
±1 |
μA |
IOZL |
(3-State Output pins)(4) |
|
VO = 0.5V |
— |
— |
±1 |
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II |
Input HIGH Current(4) |
VCC = Max., VI = VCC (Max.) |
— |
— |
±1 |
μA |
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VIK |
Clamp Diode Voltage |
VCC = Min., IIN = –18mA |
— |
–0.7 |
–1.2 |
V |
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VH |
Input Hysteresis |
|
— |
— |
200 |
— |
mV |
ICC |
Quiescent Power Supply Current |
VCC = Max., VIN = GND or VCC |
— |
0.01 |
1 |
mA |
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2537 lnk 05
OUTPUT DRIVE CHARACTERISITICS FOR FCT157/257T
Symbol |
Parameter |
Test Conditions(1) |
Min. |
Typ.(2) |
Max. |
Unit |
|
VOH |
Output HIGH Voltage |
VCC = Min. |
IOH = –6mA MIL. |
2.4 |
3.3 |
— |
V |
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VIN = VIH or VIL |
IOH = –8mA COM'L. |
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IOH = –12mA MIL. |
2.0 |
3.0 |
— |
V |
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IOH = –15mA COM'L. |
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VOL |
Output LOW Voltage |
VCC = Min. |
IOL = 32mA MIL. |
— |
0.3 |
0.50 |
V |
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VIN = VIH or VIL |
IOL = 48mA COM'L. |
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IOS |
Short Circuit Current |
VCC = Max., VO = GND(3) |
–60 |
–120 |
–225 |
mA |
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IOFF |
Input/Output Power Off Leakage(5) |
VCC = 0V, VIN or VO ≤ 4.5V |
— |
— |
±1 |
μA |
|
2537 tbl 06
OUTPUT DRIVE CHARACTERISTICS FOR FCT2257T
Symbol |
Parameter |
Test Conditions(1) |
Min. |
Typ.(2) |
Max. |
Unit |
|
IODL |
Output LOW Current |
VCC = 5V, VIN = VIH or VIL, VOUT = 1.5V(3) |
16 |
48 |
— |
mA |
|
IODH |
Output HIGH Current |
VCC = 5V, VIN = VIH or VIL, VOUT = 1.5V(3) |
–16 |
–48 |
— |
mA |
|
VOH |
Output HIGH Voltage |
VCC = Min. |
IOH = –12mA MIL. |
2.4 |
3.3 |
— |
V |
|
|
VIN = VIH or VIL |
IOH = –15mA COM'L. |
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VOL |
Output LOW Voltage |
VCC = Min. |
IOL = 12mA |
— |
0.3 |
0.50 |
V |
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VIN = VIH or VIL |
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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 |
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