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Selects Inputs
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PI74LVC138A
Fast CMOS 3.3V, 3-Line 8-Line Decoder/Demultiplexer
Product Features
Functionally compatible with family products 1.65V 3.6V supply operation, -40°C 85°C Protection exceeds 2000V, Human Body Model 200V, Machine Model Inputs accept 5.5V Balanced sink source output drives (24mA) ground bounce outputs, <0.8V 3.3V, 25°C Packages available: 16-pin 173-mil wide plastic TSSOP 16-pin 150-mil wide plastic SOIC
Product Description
Pericom Semiconductor's PI74LVC series logic circuits produced using Company's advanced micron CMOS technology, achieving high speed while maintaining low-power operation. PI74LVC138A devices designed high-performance memory-decoding data-routing applications requiring very short propagation delay times. high-performance memory systems, these decoders minimize effects system decoding. When employed with high-speed memories utilizing fast enable circuit, delay times these decoders enable time memory usually less than typical access time memory. This means that effective system delay introduced decoders negligible. conditions binary-select inputs three enable inputs select eight output lines. active-low enable inputs active-high enable input reduce need external gates inverters when expanding. 24-line decoder implemented without external inverters, 32-line decoder requires only inverter. enable input used data input demultiplexing applications. Inputs driven from either 3.3V 5.0V devices allowing PI74LVC138A used translator mixed 3.3V/5.0V system.
Data Outputs
Enable Inputs
Configuration
16-Pin
PS8674
03/20/03
Notes: unused inputs must held ensure proper device operation.
PI74LVC138A Fast CMOS 3.3V 3-line 8-line Decoder/Demultiplexer
Maximum Ratings
(Above which useful life impaired. user guidelines, tested.) Supply voltage range, -0.5V 6.5V Input voltage range, VI(1) -0.5V 6.5V Output voltage range VO(1,2) -0.5V +0.5V Input clamp current, -50mA Output clamp current, -50mA Continuous output current, ±50mA Continuous current through ±100mA Package thermal impedance, JA(3): package 111°C/W package 90°C/W Storage Temperature range, Tstg -65°C 150°C Note: Stresses greater than those listed under MAXIMUM RATINGS cause permanent damage device. This stress rating only functional operation device these other conditions above those indicated operational sections this specification implied. Exposure absolute maximum rating conditions extended periods affect reliability.
Notes: input negative-voltage output voltage ratings exceeded input output current rating observed. value provided recommended operating conditions table. package thermal impedance calculated accordance with JESD
Recommended Operating Conditions(4)
criptio ltage High- level Input ltage nditio erating Data retentio level ltage ltage ltage High- level current level current transitio rise fall rate erating free- temp erature nits
ns/V
PS8674
03/20/03
PI74LVC138A Fast CMOS 3.3V 3-line 8-line Decoder/Demultiplexer
Electrical Characteristics (Over Recommended Operating Free-Air Temperature Range, unless otherwise noted)
Parameters Test Conditions -100µA -4mA -8mA -12mA -24mA 100µA 12mA 24mA (All Inputs) 5.5V GND, input -0.6V, Other inputs 1.65V 3.6V 1.65V 2.3V 2.7V 1.65V 3.6V 1.65V 2.3V 2.7V 3.6V 3.6V 2.7V 3.6V 3.3V Min. -0.2V 0.45 0.55 Typ. Max. Units
typical values measured 3.3V, 25°C.
Operating Characteristics, 25°C
Parameters Power Dissipation Capacitance Test Conditions 10MHz 1.8V Typ. 2.5V Typ. 3.3V Typ. Units
Switching Characteristics
(Over Recommended Operating Free-Air Temperature Range, unless otherwise noted, Figures through
Parameter
From (Input)
(Output)
1.8V Min. 15.9 15.4 14.4
2.5V ±0.2V Min. Max.
2.7V Min. Max.
3.3V ±0.3V Min. Max. Units
Skew between outputs same package switching same direction.
PS8674
03/20/03
PI74LVC138A Fast CMOS 3.3V 3-line 8-line Decoder/Demultiplexer
PARAMETER MEASUREMENT INFORMATION 1.8V ±0.15V
2xVCC Open
From Output Under Test 30pF
(See Note
Test
Open
tPLZ/tPZL tPHZ/tPZH
Load Circuit
Timing Input Data Input VCC/2 VCC/2 VCC/2
Input VCC/2 VCC/2
Voltage Waveforms Pulse Duration
Voltage Waveforms Setup Hold Times
Input VCC/2 tPLH VCC/2 tPHL Output VCC/2 VCC/2 tPLH VCC/2 tPHL Output VCC/2 Output Waveform (see Note Output Waveform Open (see Note Output Control (Low Level Enabling) VCC/2 tPZL VCC/2 tPZH VCC/2 VCC/2 tPLZ +0.15V tPHZ -0.15V
Voltage Waveforms Propagation Delay Times
Voltage Waveforms Enable Disable Times
Figure Load Circuit Voltage Waveforms
Notes: includes probe capacitance. Waveform output with internal conditions such that output except when disabled output control. Waveform output with internal conditions such that output high except when disabled output control. input impulses supplied generators having following characteristics: MHz, 2.0ns, 2.0ns. Outputs measured time with transition measurement. tPLZ tPHZ same tdis tPZL tPZH same tPLH tPHL same parameters waveforms applicable devices.
PS8674
03/20/03
PI74LVC138A Fast CMOS 3.3V 3-line 8-line Decoder/Demultiplexer
PARAMETER MEASUREMENT INFORMATION 2.5V ±0.2V
2xVCC From Output Under Test 30pF
(See Note
Open
Test tPLZ/tPZL tPHZ/tPZH
Open
Load Circuit
Timing Input Data Input VCC/2 VCC/2 VCC/2
Input VCC/2 VCC/2
Voltage Waveforms Pulse Duration
Voltage Waveforms Setup Hold Times
Input VCC/2 tPLH VCC/2 tPHL Output VCC/2 VCC/2 tPLH VCC/2 tPHL Output VCC/2
Output Control (Low Level Enabling) Output Waveform (see Note Output Waveform Open (see Note
VCC/2 tPZL VCC/2 tPZH VCC/2 VCC/2 tPLZ +0.15V tPHZ -0.15V
Voltage Waveforms Propagation Delay Times
Voltage Waveforms Enable Disable Times
Figure Load Circuit Voltage Waveforms
Notes: includes probe capacitance. Waveform output with internal conditions such that output except when disabled output control. Waveform output with internal conditions such that output high except when disabled output control. input impulses supplied generators having following characteristics: MHz, 2.0ns, 2.0ns. Outputs measured time with transition measurement. tPLZ tPHZ same tdis tPZL tPZH same tPLH tPHL same parameters waveforms applicable devices.
PS8674
03/20/03
PI74LVC138A Fast CMOS 3.3V 3-line 8-line Decoder/Demultiplexer
PARAMETER MEASUREMENT INFORMATION 2.7V 3.3V ±0.3V
From Output Under Test 50pF
(See Note
Open
Test
Open
tPLZ/tPZL tPHZ/tPZH
Load Circuit
2.7V Input
Data Input 2.7V 1.5V 1.5V
2.7V Timing Input 1.5V
1.5V
1.5V
Voltage Waveforms Pulse Duration
Voltage Waveforms Setup Hold Times
Input VCC/2 tPLH VCC/2 tPHL Output VCC/2 VCC/2 tPLH VCC/2 tPHL Output VCC/2 Output Control (Low Level Enabling) Output Waveform (see Note Output Waveform (see Note 2.7V 1.5V tPZL 1.5V tPZH 1.5V 1.5V tPLZ +0.3V tPHZ -0.3V
Voltage Waveforms Propagation Delay Times
Voltage Waveforms Enable Disable Times
Figure Load Circuit Voltage Waveforms
Notes: includes probe capacitance. Waveform output with internal conditions such that output except when disabled output control. Waveform output with internal conditions such that output high except when disabled output control. input impulses supplied generators having following characteristics: MHz, 2.5ns, 2.5ns. Outputs measured time with transition measurement. tPLZ tPHZ same tdis tPZL tPZH same tPLH tPHL same parameters waveforms applicable devices.
PS8674
03/20/03
PI74LVC138A Fast CMOS 3.3V 3-line 8-line Decoder/Demultiplexer
16-pin 150-mil wide SOIC Package
.149 .157
3.78 3.99 .0099 .0196 0.25 0.50
.386 .393 9.80 10.00 .0155 .0260 0.393 0.660 .053 .068 1.35 1.75 SEATING PLANE 0-8° 0.41 1.27 .016 .050 .0075 .0098 0.19 0.25
.2284 .2440 5.80 6.20
.050 1.27
.013 .020 0.330 0.508
.0040 0.10 .0098 0.25
X.XX DENOTES DIMENSIONS X.XX MILLIMETERS
16-pin 173-mil wide TSSOP Package
.169 .177
.193 .201 .004 .008 .047 max. 1.20 SEATING PLANE 0.45 .018 0.75 .030 .252
0.09 0.20
.0256 0.65
.007 .012 0.19 0.30
.002 .006
0.05 0.15 X.XX DENOTES CONTROLLING X.XX DIMENSIONS MILLIMETERS
Ordering Information
Ordering Code PI74LVC138AL PI74LVC138AW Package Type 16-pin, 173-mil wide plastic TSSOP 16-pin, 150-mil wide plastic SOIC Operating Range -40°C 85°C
Pericom Semiconductor Corporation 2380 Bering Drive Jose, 95131 1-800-435-2336 (408) 435-1100 http://www.pericom.com
PS8674 03/20/03
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