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Details, datasheet, quote on part number:QS74FCT138ATP
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Datasheet text preview:
QS54/74FCT138T, 238T
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QUALITY SEMICONDUCTOR, INC.
FEATURES/BENEFITS
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High-Speed CMOS 1-of-8 Decoders
QS54/74FCT138T QS54/74FCT238T
DESCRIPTION
The QSFCT138T and QSFCT238T are high-speed CMOS TTL-compatible high-speed binary decoders. The QSFCT138T has negative active outputs, and the QSFCT238T has positive active outputs. The high output current IOL and IOH drive highcapacitance loads. All inputs have clamp diodes for undershoot noise suppression. All outputs have ground bounce suppression (see QSI Application Note AN-001), and outputs will not load an active bus when VCC is removed from the device.
QSFCT138A faster than 74F Industrial temperature 40°C to 85°C IOL = 48mA IND, 32mA MIL TTL-compatible input and output levels Mil product compliant with MIL-STD 883, Class B QSFCT238T has positive active outputs CMOS power levels < 7.5mW static Available in DIP, SOIC, QSOP, HQSOP JEDEC standard pinouts
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Figure 1. Functional Block Diagram
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an ow N
A0
E1 E2 E3 A2
A1
O0
O1
O2
O3
O4
O5
O6
O7
Inverting Outputs on 138 Only (Non-inverting Outputs on 238)
MDSL-00003-04 DECEMBER 28, 1998
QUALITY SEMICONDUCTOR, INC.
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QS54/74FCT138T, 238T Figure 2. Pin Configurations (All Pins Top View)
DIP, SOIC, QSOP HQSOP
A0 A1 A2 E1 E2 E3 O7 GND
1 2 3 4 5 6 7 8
16 15 14 13 12 11 10 9
VCC O0 O1 O2 O3 O4 O5 O6
NC A0 A1 A2 E1 E2 E3 O7 GND GND
1 2 3 4 5 6 7 8 9 10
20 19 18 17 16 15 14 13 12 11
VCC VCC O0 O1 O2 O3 O4 O5 O6 NC
Note: Available in both 150-mil wide SOIC (Package Code SI) and 300-mil SOIC (Package Code SO).
Table 1. Pin Description and Function Table
Name A2-A0 O7-O0 E1, E2, E3 Enable E1 H X X L L L L L L L L E2 X X L L L L L L L L H E3 X X L H H H H H H H H A2 X X L L L L H H H H I/O I O I Description Select Inputs Decode Outputs Enable Select A1 X X X L L H H L L H H Output State 0 1
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H L L H O2 0 0 0 0 0 1 0 0 0 0 0 O1 0 0 0 0 1 0 0 0 0 0 0 O0 0 0 0 1 0 0 0 0 0 0 0
Output Level 138 238
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Function Disable Disable Disable A2-0 = 0 A2-0 = 1 A2-0 = 2 A2-0 = 3 A2-0 = 4 A2-0 = 5 A2-0 = 6 A2-0 = 7
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A0 X X X L H L H L H L H
Output O7 0 0 0 0 0 0 0 0 0 0 1 O6 0 0 0 0 0 0 0 0 0 1 0 O5 0 0 0 0 0 0 0 0 1 0 0 O4 0 0 0 0 0 0 0 1 0 0 0 O3 0 0 0 0 0 0 1 0 0 0 0
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QUALITY SEMICONDUCTOR, INC.
MDSL-00003-04 DECEMBER 28, 1998
QS54/74FCT138T, 238T Table 2. Absolute Maximum Ratings
Supply Voltage to Ground ....... 0.5V to 7.0V DC Output Voltage VOUT ......... 0.5V to 7.0V DC Input Voltage VIN ......... 0.5V to 7.0V AC Input Voltage (for a pulse width 20ns) ......... 3.0V DC Input Diode Current with VIN < 0 .......... 20mA DC Output Diode Current with VOUT < 0 .... 50mA DC Output Current Max. Sink Current/Pin .......... 120mA Maximum Power Dissipation ......... 0.5 watts TSTG Storage Temperature ..... 65° to 150°C
Note: Stresses greater than those listed under ABSOLUTE M A X I M U M RATINGS may cause permanent damage to this device resulting in functional or reliability type failures.
Table 3. Capacitance(1)
TA = 25°C, f = 1MHz, VIN = 0V, VOUT = 0V Pins(2) 1-3 7, 9-12 4-6, 13-15 SOIC 4 6 8 QSOP 4 6 8 PDIP 5 7 9 Unit pF pF pF
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Notes: 1. Capacitance is characterized but not tested. 2. Pin reference for 16-pin package.
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Min 2.0 -- -- -- 60 -- 2.4 2.4 -- --
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Typ(1) -- -- 0.2 -- -- 0.7 -- -- -- -- Max -- 0.8 -- 5 -- 1.2 -- -- 0.50 0.50 Unit V V V µA mA V V V
Table 4. DC Electrical Characteristics Over Operating Range
Industrial TA = 40°C to 85°C, VCC = 5.0V ±5% Symbol VIH VIL
VT
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Parameter
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Military TA = 55°C to 125°C, VCC = 5.0V ±10%
Test Conditions Logic HIGH for All Inputs Logic LOW for All Inputs VTLH VTHL for All Inputs VCC = Max., 0 VIN < VCC VCC = Max., VOUT = GND(2,3) VCC = Min., IIN = 18MA, TA = 25°C(3) VCC = Min., VCC = Min., IOH = 12mA (MIL) IOH = 15mA (IND) IOL = 32mA (MIL) IOL = 48mA (IND)
Input HIGH Voltage Input LOW Voltage Input Hysteresis
| IIH | | IIL | IOS VIC VOH VOL
Input Current Input HIGH or LOW Short Circuit Current Input Clamp Voltage Output HIGH Voltage Output LOW Voltage
Notes: 1. Typical values indicate VCC = 5.0V and TA = 25°C. 2. Not more than one output should be shorted and the duration is 1 second. 3. These parameters are guaranteed by design but not tested.
MDSL-00003-04 DECEMBER 28, 1998
QUALITY SEMICONDUCTOR, INC.
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