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Part: IDT54FCT2157ATDB
Category:
Logic
-> Encoders/Multiplexers
Description: Fast CMOS Quad 2-input Multiplexer
Company: Integrated Device Technology, Inc.
Datasheet: Download IDT54FCT2157ATDB datasheet File size : 239 kB
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Datasheet text preview:
FAST CMOS QUAD 2-INPUT MULTIPLEXER
Integrated Device Technology, Inc.
IDT54/74FCT157T/AT/CT/DT IDT54/74FCT257T/AT/CT/DT IDT54/74FCT2257T/AT/CT
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.) (-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
S
PIN CONFIGURATIONS
S I 0A I 1A ZA I 0B I 1B ZB GND
1 2 3 4 5 6 7 8 16 15
157 Only
E 3 other multiplexers
P16-1, D16-1, SO16-1, SO16-7 & E16-1
14 13 12 11 10 9
I1B I1D I0B I0D
Z BZ D
Vcc E or OE* I 0C I 1C ZC I 0D I 1D ZD
2537 drw 02
DIP/SOIC/QSOP/CERPACK TOP VIEW
ZA
I0A S NC Vcc E or OE*
3 2 1 4 5 6 7 8 20 19 18 17 16 15 14 9 10 11 12 13
I 1A I 0A 257 Only OE
INDEX
2537 drw 01
I 1A ZA NC I 0B I 1B
L20-2
I 0C I 1C NC ZC I 0D
LCC TOP VIEW
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
ZB GND NC ZD I1 D
2537 drw 03
*
E
for FCT157, OE for FCT257/FCT2257.
MILITARY AND COMMERCIAL TEMPERATURE RANGES
©1996 Integrated Device Technology, Inc.
JUNE 1996
2537/6
6.6
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
Pin Names I0AI0D I1AI1D
E OE
FUNCTION TABLE(1)
Description Inputs
E OE
Output ZN I0 X X X L H I1 X L H X X 157 L L H L H 257 Z L H L H
2537 tbl 02
Source 0 Data Inputs Source 1 Data Inputs Enable Input (Active LOW)FCT157T Output Enable (Active LOW)FCT257T/2257T Select Input Outputs
2537 tbl 01
/
S X H H L L
H L L L L
S ZAZD
NOTE: 1. H = HIGH Voltage Level L = LOW Voltage Level X = Don't Care Z = High Impedance
ABSOLUTE MAXIMUM RATINGS(1)
Symbol Rating Commercial VTERM(2) Terminal Voltage 0.5 to +7.0 with Respect to GND VTERM(3) Terminal Voltage 0.5 to with Respect to VCC +0.5 GND TA Operating 0 to +70 Temperature TBIAS Temperature 55 to +125 Under Bias TSTG Storage 55 to +125 Temperature PT Power Dissipation 0.5 I OUT DC Output Current 60 to +120 Military 0.5 to +7.0 Unit V
CAPACITANCE (TA = +25°C, f = 1.0MHz)
Symbol Parameter(1) CIN Input Capacitance COUT Output Capacitance Conditions VIN = 0V VOUT = 0V Typ. 6 8 Max. Unit 10 pF 12
pF
2537 lnk 04
0.5 to VCC +0.5 55 to +125 65 to +135 65 to +150 0.5 60 to +120
V °C °C °C W mA
NOTE: 1. This parameter is measured at characterization but not tested.
2537 lnk 03 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. 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 VIH VIL II H II L I OZH I OZL II VIK VH I CC Parameter Input HIGH Level Input LOW Level Input HIGH Input LOW Current (4) Current (4) VCC = Max. pins) (4) VCC = Min., IIN = 18mA
--
Test Conditions(1) Guaranteed Logic HIGH Level Guaranteed Logic LOW Level VCC = Max. VI = 2.7V VI = 0.5V VO = 2.7V VO = 0.5V VCC = Max., VI = VCC (Max.)
Min. 2.0 -- -- -- -- -- -- -- -- --
Typ.(2) -- -- -- -- -- -- -- 0.7 200 0.01
Max. -- 0.8
Unit V V
±1 ±1 ±1 ±1 ±1
1.2 -- 1
µA µA µA
V mV mA
2537 lnk 05
High Impedance Output Current (3-State Output Input HIGH Current (4)
Clamp Diode Voltage Input Hysteresis Quiescent Power Supply Current
VCC = Max., VIN = GND or VCC
OUTPUT DRIVE CHARACTERISITICS FOR FCT157/257T
Symbol VOH Parameter Output HIGH Voltage Test Conditions(1) VCC = Min. IOH = 6mA MIL. VIN = VIH or VIL IOH = 8mA COM'L. IOH = 12mA MIL. IOH = 15mA COM'L. VCC = Min. IOL = 32mA MIL. VIN = VIH or VIL IOL = 48mA COM'L. VCC = Max., VO = GND (3) VCC = 0V, VIN or VO 4.5V Min. 2.4 2.0 -- 60 -- Typ.(2) 3.3 3.0 0.3 120 -- Max. -- -- 0.50 225 Unit V V V mA
VOL IOS IOFF
Output LOW Voltage Short Circuit Current Input/Output Power Off Leakage(5)
±1
µA
2537 tbl 06
OUTPUT DRIVE CHARACTERISTICS FOR FCT2257T
Symbol I ODL I ODH VOH VOL Parameter Output LOW Current Output HIGH Current Output HIGH Voltage Output LOW Voltage Test Conditions(1) VCC = 5V, VIN = VIH or VIL, VOUT = 1.5V (3) VCC = 5V, VIN = VIH or V IL, VOUT = 1.5V (3) VCC = Min. VIN = VIH or VIL VCC = Min. VIN = VIH or VIL I OH = 12mA MIL. I OH = 15mA COM'L. I OL = 12mA Min. 16 16 2.4 -- Typ.(2) 48 48 3.3 0.3 Max. -- -- -- 0.50 Unit mA mA V V
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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