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M54HCT138 M74HCT138

B1R (Plastic Package)

M54HCT138 M74HCT138
3 TO 8 LINE DECODER (INVERTING)
B1R (Plastic Package)
F1R (Ceramic Package)
M1R (Micro Package)
C1R (Chip Carrier)
DESCRIPTION The M54 / 74HC138 is a high speed CMOS 3 TO 8 LINE DECODER fabricated in silicon gate C 2MOS technology. It has the same high speed performance of LSTTL combined with true CMOSlow power consumption. If the device is enabled, 3 binary select inputs (A, B and C) determine which one of the outputs will go low. If enable input G1 is held low or either G2A or G2B is held high, the decoding function is inhibited and all the 8 outputs go high. Three enable inputs are provided to ease cascade connection and application of address decoders for memory systems. All inputs are equipped with protection circuits against static discharge and tran- sient excess voltage.This integrated circuit has input and output characteristics that are fully compatible with 54 / 74 LSTTL logic families. M54 / 74HCT devices 2 are designed to directly interface HSC MOS systems with TTL and NMOS components. They are also plug in replacements for LSTTL devices giving a reduction of power consumption. INPUT AND OUTPUT EQUIVALENT CIRCUIT
ORDER CODES : M54HCT138F1R M74HCT138M1R M74HCT138B1R M74HCT138C1R
PIN CONNECTIONS (top view)
February 1993
M54 / M74HCT138
TRUTH TABLE
PIN DESCRIPTION
PIN No 1, 2, 3 4, 5 6 15, 14, 13, 12, 11, 10, 9, 7 8 16 SYMBOL A, B, C G2A, G2B G1 Y0 to Y7 NAME AND FUNCTION Address Inputs Enable Inputs Enable Input Outputs
IEC LOGIC SYMBOL
Ground (0V) Positive Supply Voltage
LOGIC DIAGRAM
M54 / M74HCT138
ABSOLUTE MAXIMUM RATINGS
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition isnotimplied. () 500 mW: 65 oC derate to 300 mW by 10mW / oC: 65 oC to 85 oC
RECOMMENDED OPERATING CONDITIONS
M54 / M74HCT138
DC SPECIFICATIONS
High Level Input Voltage Low Level Input Voltage High Level Output Voltage
Low Level Output Voltage
II ICC ICC
Input Leakage Current Quiescent Supply Current Additional worst case supply current
M54 / M74HCT138
tTLH tTHL tPLH tPHL tPLH tPHL tPLH tPHL CIN CPD ()
Output Transition Time Propagation Delay Time (A, B, C - Y) Propagation Delay Time (G1 - Y) Propagation Delay Time (G2 - Y) Input Capacitance Power Dissipation Capacitance
SWITCHING CHARACTERISTICS TEST WAVEFORM
TEST CIRCUIT ICC (Opr.)
INPUT WAVEFORM IS THE SAME AS THAT IN CASE OF SWITCHING CHARACTERISTICSTEST.
M54 / M74HCT138
Plastic DIP16 (0.25) MECHANICAL DATA
mm MIN. a1 B b b1 D E e e3 F I L Z 3.3 1.27 8.5 2.54 17.78 7.1 5.1 0.130 0.050 0.51 0.77 0.5 0.25 20 0.335 0.100 0.700 0.280 0.201 1.65 TYP. MAX. MIN. 0.020 0.030 0.020 0.010 0.787 0.065 inch TYP. MAX.
P001C
M54 / M74HCT138
Ceramic DIP16 / 1 MECHANICAL DATA
mm MIN. A B D E e3 F G H L M N P Q 7.8 2.29 0.4 1.17 0.22 0.51 0.38 17.78 2.79 0.55 1.52 0.31 1.27 10.3 8.05 5.08 0.307 0.090 0.016 0.046 0.009 0.020 3.3 0.015 0.700 0.110 0.022 0.060 0.012 0.050 0.406 0.317 0.200 TYP. MAX. 20 7 0.130 MIN. inch TYP. MAX. 0.787 0.276
P053D
M54 / M74HCT138
SO16 (Narrow) MECHANICAL DATA
DIM. MIN. A a1 a2 b b1 C c1 D E e e3 F G L M S 3.8 4.6 0.5 9.8 5.8 1.27 8.89 4.0 5.3 1.27 0.62 8° (max.) 0.149 0.181 0.019 10 6.2 0.35 0.19 0.5 45° (typ.) 0.385 0.228 0.050 0.350 0.157 0.208 0.050 0.024 0.393 0.244 0.1 mm TYP. MAX. 1.75 0.2 1.65 0.46 0.25 0.013 0.007 0.019 0.004 MIN. inch TYP. MAX. 0.068 0.007 0.064 0.018 0.010
P013H
M54 / M74HCT138
PLCC20 MECHANICAL DATA
mm MIN. A B D d1 d2 E e e3 F G M M1 1.27 1.14 7.37 1.27 5.08 0.38 0.101 0.050 0.045 9.78 8.89 4.2 2.54 0.56 8.38 0.290 0.050 0.200 0.015 0.004 TYP. MAX. 10.03 9.04 4.57 MIN. 0.385 0.350 0.165 0.100 0.022 0.330 inch TYP. MAX. 0.395 0.356 0.180
P027A
M54 / M74HCT138