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Part: CD54HCT138F3A
Category:
Logic
-> Decoders/Demultiplexers
-> Decoders
Description: ti CD54HCT138, High Speed CMOS Logic Inverting And Non-inverting 3-to-8 Line Decoder Demultiplexer
Company: Texas Instruments, Inc.
Datasheet: Download CD54HCT138F3A datasheet File size : 251 kB
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Datasheet text preview:
CD54/74HC138, CD54/74HCT138, CD54/74HC238, CD54/74HCT238
Data sheet acquired from Harris Semiconductor SCHS147G
October 1997 - Revised October 2003
High-Speed CMOS Logic 3- to 8-Line Decoder/ Demultiplexer Inverting and Non-Inverting
Ordering Information
PART NUMBER CD54HC138F3A CD54HC238F3A CD54HCT138F3A CD54HCT238F3A CD74HC138E CD74HC138M CD74HC138MT CD74HC138M96 CD74HC238E CD74HC238M CD74HC238MT CD74HC238M96 CD74HC238NSR CD74HC238PW CD74HC238PWR CD74HC238PWT CD74HCT138E CD74HCT138M CD74HCT138MT CD74HCT138M96 CD74HCT238E CD74HCT238M TEMP. RANGE (oC) -55 to 125 -55 to 125 -55 to 125 -55 to 125 -55 to 125 -55 to 125 -55 to 125 -55 to 125 -55 to 125 -55 to 125 -55 to 125 -55 to 125 -55 to 125 -55 to 125 -55 to 125 -55 to 125 -55 to 125 -55 to 125 -55 to 125 -55 to 125 -55 to 125 -55 to 125 PACKAGE 16 Ld CERDIP 16 Ld CERDIP 16 Ld CERDIP 16 Ld CERDIP 16 Ld PDIP 16 Ld SOIC 16 Ld SOIC 16 Ld SOIC 16 Ld PDIP 16 Ld SOIC 16 Ld SOIC 16 Ld SOIC 16 Ld SOP 16 Ld TSSOP 16 Ld TSSOP 16 Ld TSSOP 16 Ld PDIP 16 Ld SOIC 16 Ld SOIC 16 Ld SOIC 16 Ld PDIP 16 Ld SOIC
Features
· Select One Of Eight Data Outputs Active Low for 138, Active High for 238
[ /Title (CD74 HC138 , CD74 HCT13 8, CD74 HC238 , CD74 HCT23 8) /Subject (High Speed
· l/O Port or Memory Selector · Three Enable Inputs to Simplify Cascading · Typical Propagation Delay of 13ns at VCC = 5V, CL = 15pF, TA = 25oC · Fanout (Over Temperature Range) - Standard Outputs . . . . . . . . . . . . . . . 10 LSTTL Loads - Bus Driver Outputs . . . . . . . . . . . . . 15 LSTTL Loads · Wide Operating Temperature Range . . . -55oC to 125oC · Balanced Propagation Delay and Transition Times · Significant Power Reduction Compared to LSTTL Logic ICs · HC Types - 2V to 6V Operation - High Noise Immunity: NIL = 30%, NIH = 30% of VCC at VCC = 5V · HCT Types - 4.5V to 5.5V Operation - Direct LSTTL Input Logic Compatibility, VIL= 0.8V (Max), VIH = 2V (Min) - CMOS Input Compatibility, Il 1µA at VOL, VOH
Description
The 'HC138, 'HC238, 'HCT138, and 'HCT238 are high speed silicon gate CMOS decoders well suited to memor y address decoding or data routing applications. Both circuits feature low power consumption usually associated with CMOS circuitry, yet have speeds comparable to low power Schottky TTL logic. Both circuits have three binary select inputs (A0, A1 and A2). If the device is enabled, these inputs determine which one of the eight normally high outputs of the HC/HCT138 series will go low or which of the normally low outputs of the HC/HCT238 series will go high. Two active low and one active high enables (E1, E2, and E3) are provided to ease the cascading of decoders. The decoder's 8 outputs can drive 10 low power Schottky TTL equivalent loads.
NOTE: When ordering, use the entire par t number. The suffixes 96 and R denote tape and reel. The suffix T denotes a small-quantity reel of 250.
CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures. Copyright
© 2003, Texas Instruments Incorporated
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CD54/74HC138, CD54/74HCT138, CD54/74HC238, CD54/74HCT238 Pinout
CD54HC138, CD54HCT138, CD54HC238, CD54HCT238 (CERDIP) CD74HC138, CD74HCT138, CD74HCT238 (PDIP, SOIC) CD74HC238 (PDIP, SOIC, SOP, TSSOP) TOP VIEW
A0 1 A1 2 A2 3 E1 4 E2 5 E3 6 (Y7) Y7 7 GND 8 16 VCC 15 Y0 (Y0) 14 Y1 (Y1) 13 Y2 (Y2) 12 Y3 (Y3) 11 Y4 (Y4) 10 Y5 (Y5) 9 Y6 (Y6) E1 5 E2 E3 6 9 Y6 7 Y7 Y7 Y6 10 Y5 Y5
Functional Diagram
HC/HCT HC/HCT 238 138 A0 A1 3 A2 12 Y3 4 11 Y4 Y4 Y3 13 Y2 Y2 1 2 15 14 Y0 Y1 Y0 Y1
Signal names in parentheses are for 'HC138 and 'HCT138. TRUTH TABLE 'HC138, 'HCT138 INPUTS ENABLE E3 X L X H H H H H H H H E2 X X H L L L L L L L L E1 H X X L L L L L L L L A2 X X X L L L L H H H H ADDRESS A1 X X X L L H H L L H H A0 X X X L H L H L H L H Y0 H H H L H H H H H H H Y1 H H H H L H H H H H H Y2 H H H H H L H H H H H OUTPUTS Y3 H H H H H H L H H H H Y4 H H H H H H H L H H H Y5 H H H H H H H H L H H Y6 H H H H H H H H H L H Y7 H H H H H H H H H H L
H = High Voltage Level, L = Low Voltage Level, X = Don't Care TRUTH TABLE 'HC238, 'HCT238 INPUTS ENABLE E3 X L X H H H H H H H H E2 X X H L L L L L L L L E1 H X X L L L L L L L L A2 X X X L L L L H H H H ADDRESS A1 X X X L L H H L L H H A0 X X X L H L H L H L H Y0 L L L H L L L L L L L Y1 L L L L H L L L L L L Y2 L L L L L H L L L L L OUTPUTS Y3 L L L L L L H L L L L Y4 L L L L L L L H L L L Y5 L L L L L L L L H L L Y6 L L L L L L L L L H L Y7 L L L L L L L L L L H
H = High Voltage Level, L = Low Voltage Level, X = Don't Care
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CD54/74HC138, CD54/74HCT138, CD54/74HC238, CD54/74HCT238
Absolute Maximum Ratings
DC Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . -0.5V to 7V DC Input Diode Current, IIK For VI VCC + 0.5V . . . . . . . . . . . . . . . . . . . . . .±20mA DC Output Diode Current, IOK For VO VCC + 0.5V . . . . . . . . . . . . . . . . . . . .±20mA DC Output Source or Sink Current per Output Pin, IO For VO > -0.5V or VO < VCC + 0.5V . . . . . . . . . . . . . . . . . . . .±25mA DC VCC or Ground Current, ICC or IGND . . . . . . . . . . . . . . . . . .±50mA
Thermal Information
Package Thermal Impedance, JA (see Note 1): E (PDIP) Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67oC/W M (SOIC) Package. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73oC/W NS (SOP) Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64oC/W PW (TSSOP) Package . . . . . . . . . . . . . . . . . . . . . . . . . 108oC/W Maximum Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . 150oC Maximum Storage Temperature Range . . . . . . . . . .-65oC to 150oC Maximum Lead Temperature (Soldering 10s) . . . . . . . . . . . . . 300oC (SOIC - Lead Tips Only)
Operating Conditions
Temperature Range (TA) . . . . . . . . . . . . . . . . . . . . . -55oC to 125oC Supply Voltage Range, VCC HC Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2V to 6V HCT Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4.5V to 5.5V DC Input or Output Voltage, VI, VO . . . . . . . . . . . . . . . . . 0V to VCC Input Rise and Fall Time 2V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1000ns (Max) 4.5V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 500ns (Max) 6V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 400ns (Max)
CAUTION: Stresses above those listed in "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress only rating and operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
NOTE: 1. The package thermal impedance is calculated in accordance with JESD 51-7.
DC Electrical Specifications
TEST CONDITIONS PARAMETER HC TYPES High Level Input Voltage VIH 2 4.5 6 Low Level Input Voltage VIL 2 4.5 6 High Level Output Voltage CMOS Loads High Level Output Voltage TTL Loads Low Level Output Voltage CMOS Loads Low Level Output Voltage TTL Loads Input Leakage Current Quiescent Device Current II ICC VCC or GND VCC or GND VOL VIH or VIL VOH VIH or VIL -0.02 -0.02 -0.02 -4 -5.2 0.02 0.02 0.02 4 5.2 0 2 4.5 6 4.5 6 2 4.5 6 4.5 6 6 6 1.5 3.15 4.2 1.9 4.4 5.9 3.98 5.48 0.5 1.35 1.8 0.1 0.1 0.1 0.26 0.26 ±0.1 8 1.5 3.15 4.2 1.9 4.4 5.9 3.84 5.34 0.5 1.35 1.8 0.1 0.1 0.1 0.33 0.33 ±1 80 1.5 3.15 4.2 1.9 4.4 5.9 3.7 5.2 0.5 1.35 1.8 0.1 0.1 0.1 0.4 0.4 ±1 160 V V V V V V V V V V V V V V V V V V µA µA SYMBOL VI (V) IO (mA) VCC (V) 25oC MIN TYP MAX -40oC TO 85oC -55oC TO 125oC MIN MAX MIN MAX UNITS
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CD54/74HC138, CD54/74HCT138, CD54/74HC238, CD54/74HCT238
DC Electrical Specifications (Continued)
TEST CONDITIONS PARAMETER HCT TYPES High Level Input Voltage Low Level Input Voltage High Level Output Voltage CMOS Loads High Level Output Voltage TTL Loads Low Level Output Voltage CMOS Loads Low Level Output Voltage TTL Loads Input Leakage Current Quiescent Device Current Additional Quiescent Device Current Per Input Pin: 1 Unit Load NOTE: 2. For dual-supply systems theoretical worst case (VI = 2.4V, VCC = 5.5V) specification is 1.8mA. II ICC ICC (Note 2) VCC and GND VCC or GND VCC -2.1 VOL VIH or VIL VIH VIL VOH VIH or VIL -0.02 4.5 to 5.5 4.5 to 5.5 4.5 2 4.4 0.8 2 4.4 0.8 2 4.4 0.8 V V V SYMBOL VI (V) IO (mA) VCC (V) 25oC MIN TYP MAX -40oC TO 85oC -55oC TO 125oC MIN MAX MIN MAX UNITS
-4
4.5
3.98
-
-
3.84
-
3.7
-
V
0.02
4.5
-
-
0.1
-
0.1
-
0.1
V
4
4.5
-
-
0.26
-
0.33
-
0.4
V
0 0 -
5.5 5.5 4.5 to 5.5
100
±0.1 8 360
-
±1 80 450
-
±1 160 490
µA µA µA
HCT Input Loading Table
INPUT A0-A2 E1, E2 E3 UNIT LOADS 1.5 1.25 1
NOTE: Unit Load is ICC limit specified in DC Electrical Table, e.g., 360µA max at 25oC.
Switching Specifications Input tr, tf = 6ns
TEST CONDITIONS 25oC VCC (V) MIN TYP MAX -40oC TO 85oC MIN MAX -55oC TO 125oC MIN MAX UNITS
PARAMETER HC TYPES Propagation Delay Address to Output
SYMBOL
tPLH, tPHL CL = 50pF
2 4.5
-
13 -
150 30 26
-
190 38 33
-
225 45 38
ns ns ns ns
CL = 15pF CL = 50pF
5 6
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CD54/74HC138, CD54/74HCT138, CD54/74HC238, CD54/74HCT238
Switching Specifications Input tr, tf = 6ns (Continued)
TEST CONDITIONS 25oC VCC (V) 2 4.5 6 Output Transition Time (Figure 1) tTLH, tTHL CL = 50pF 2 4.5 6 Power Dissipation Capacitance, (Notes 3, 4) Input Capacitance HCT TYPES Propagation Delay Address to Output tPLH, tPHL CL = 50pF CL = 15pF Enable to Output HC/HCT138 Enable to Output HC/HCT238 Output Transition Time (Figure 2) Power Dissipation Capacitance, (Notes 3, 4) Input Capacitance NOTES: 3. CPD is used to determine the dynamic power consumption, per gate. 4. PD = VCC2 fi (CPD + CL) where: fi = Input Frequency, CL = Output Load Capacitance, VCC = Supply Voltage. tPLH, tPHL CL = 50pF tPLH, tPHL CL = 15pF tTLH, tTHL CL = 50pF CPD CIN CL = 15pF 4.5 5 4.5 4.5 4.5 5 14 67 35 35 40 15 10 44 44 50 19 10 53 53 60 22 10 ns ns ns ns ns pF pF CPD CIN CL = 15pF 5 MIN TYP 67 MAX 150 30 26 75 15 13 10 -40oC TO 85oC MIN MAX 190 38 33 95 19 16 10 -55oC TO 125oC MIN MAX 265 53 45 110 22 19 10 UNITS ns ns ns ns ns ns pF pF
PARAMETER Enable to Output HC/HCT138
SYMBOL
tPLH, tPHL CL = 50pF
Test Circuits and Waveforms
tr = 6ns INPUT 90% 50% 10% tTLH 90% 50% 10% tPHL tPLH tf = 6ns VCC INPUT GND tTHL tr = 6ns 2.7V 1.3V 0.3V tTLH 90% INVERTING OUTPUT tPHL tPLH 1.3V 10% tf = 6ns 3V
GND
tTHL
INVERTING OUTPUT
FIGURE 7. HC AND HCU TRANSITION TIMES AND PROPAGATION DELAY TIMES, COMBINATION LOGIC
FIGURE 8. HCT TRANSITION TIMES AND PROPAGATION DELAY TIMES, COMBINATION LOGIC
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