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零件编号 | M74HCT138 | ||
描述 | 3 TO 8 LINE DECODER INVERTING | ||
制造商 | ST Microelectronics | ||
LOGO | |||
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M54HCT138
M74HCT138
3 TO 8 LINE DECODER (INVERTING)
. HIGH SPEED
tPD = 16 ns (TYP.) at VCC = 5 V
. LOW POWER DISSIPATION
ICC = 4 µA AT TA = 25 °C
. OUTPUT DRIVE CAPABILITY
10 LSTTL LOADS
. BALANCED PROPAGATION DELAYS
tPLH = tPHL
. SYMMETRICAL OUTPUT IMPEDANCE
|IOH| = IOL
. COMPATIBLE WITH TTL OUTPUTS
VIH = 2V (MIN.) VIL = 0.8V (MAX)
. PIN AND FUNCTION COMPATIBLE
WITH 54/74LS138
B1R
(Plastic Package)
F1R
(Ceramic Package)
M 1R
(Micro Package)
C1R
(Chip Carrier)
DESCRIPTION
The M54/74HC138 is a high speed CMOS 3 TO 8
LINE DECODER fabricated in silicon gate C2MOS
technology. It has the same high speed perform-
ance of LSTTL combined with true CMOSlow power
consumption. If the device is enabled, 3 binary se-
lect 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 func-
tion is inhibited and all the 8 outputs go high. Three
enable inputs are provided to ease cascade connec-
tion and application of address decoders for mem-
ory systems. All inputs are equipped with protection
circuits against static discharge and tran- sient ex-
cess voltage.This integrated circuit has input and
output characteristics that are fully compatible with
54/74 LSTTL logic families. M54/74HCT devices
are designed to directly interface HSC2MOS sys-
tems with TTL and NMOS components. They are
also plug in replacements for LSTTL devices giving
a reduction of power consumption.
ORDER CODES :
M54HCT138F1R M74HCT138M1R
M74HCT138B1R M74HCT138C1R
PIN CONNECTIONS (top view)
INPUT AND OUTPUT EQUIVALENT CIRCUIT
February 1993
NC =
No Internal
Connection
1/10
M54/M74HCT138
DIM.
A
a1
a2
b
b1
C
c1
D
E
e
e3
F
G
L
M
S
SO16 (Narrow) MECHANICAL DATA
MIN.
0.1
0.35
0.19
9.8
5.8
3.8
4.6
0.5
mm
TYP.
0.5
1.27
8.89
MAX.
1.75
0.2
1.65
0.46
0.25
MIN.
0.004
0.013
0.007
45° (typ.)
10 0.385
6.2 0.228
4.0 0.149
5.3 0.181
1.27 0.019
0.62
8° (max.)
inch
TYP.
0.019
0.050
0.350
MAX.
0.068
0.007
0.064
0.018
0.010
0.393
0.244
0.157
0.208
0.050
0.024
P013H
8/10
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页数 | 10 页 | ||
下载 | [ M74HCT138.PDF 数据手册 ] |
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