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M54HC138 M74HC138

B1R (Plastic Package)

M54HC138 M74HC138
3 TO 8 LINE DECODER (INVERTING)
B1R (Plastic Package)
F1R (Ceramic Package)
M1R (Micro Package)
C1R (Chip Carrier)
ORDER CODES : M54HC138F1R M74HC138M1R M74HC138B1R M74HC138C1R
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 CMOS low 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 transient excess voltage. INPUT AND OUTPUT EQUIVALENT CIRCUIT
PIN CONNECTIONS (top view)
October 1992
M54 / M74HC138
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 / M74HC138
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 / M74HC138
DC SPECIFICATIONS
High Level Input Voltage Low Level Input Voltage
M54 / M74HC138
tTLH tTHL tPLH tPHL tPLH tPHL CIN CPD ()
Output Transition Time Propagation Delay Time (A, B, C - Y) Propagation Delay Time (G, G - 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 / M74HC138
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 / M74HC138
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 / M74HC138
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 / M74HC138
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 / M74HC138