MC54HCT373A Datasheet PDF - Motorola

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MC54HCT373A
Motorola

Part Number MC54HCT373A
Description Octal 3-State Noninverting Transceiver Latch
Page 8 Pages


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MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
Octal 3-State Noninverting
Transparent Latch with
LSTTL-Compatible Inputs
High–Performance Silicon–Gate CMOS
The MC54/74HCT373A may be used as a level converter for
interfacing TTL or NMOS outputs to High–Speed CMOS inputs.
The HCT373A is identical in pinout to the LS373.
The eight latches of the HCT373A are transparent D–type latches.
While the Latch Enable is high the Q outputs follow the Data Inputs. When
Latch Enable is taken low, data meeting the setup and hold times
becomes latched.
The Output Enable does not affect the state of the latch, but when
Output Enable is high, all outputs are forced to the high–impedance state.
Thus, data may be latched even when the outputs are not enabled.
The HCT373A is identical in function to the HCT573A, which has the
input pins on the opposite side of the package from the output pins. This
device is similar in function to the HCT533A, which has inverting outputs.
Output Drive Capability: 15 LSTTL Loads
TTL/NMOS–Compatible Input Levels
Outputs Directly Interface to CMOS, NMOS, and TTL
Operating Voltage Range: 4.5 to 5.5 V
Low Input Current: 1.0 µA
In Compliance with the Requirements Defined by JEDEC Standard
No. 7A
Chip Complexity: 196 FETs or 49 Equivalent Gates
LOGIC DIAGRAM
DATA
INPUTS
D0 3
D1 4
D2 7
D3 8
D4 13
D5 14
D6 17
D7 18
2 Q0
5 Q1
6 Q2
9 Q3
12 Q4
15 Q5
16 Q6
19 Q7
NONINVERTING
OUTPUTS
LATCH ENABLE 11
OUTPUT ENABLE 1
PIN 20 = VCC
PIN 10 = GND
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎDesign Criteria
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎInternal Gate Count*
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎInternal Gate Propagation Delay
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎInternal Gate Power Dissipation
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎSpeed Power Product
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ* Equivalent to a two–input NAND gate.
Value
49
1.5
5.0
.0075
Units
ea.
ns
µW
pJ
2/97
© Motorola, Inc. 1997
1
MC54/74HCT373A
20
1
J SUFFIX
CERAMIC PACKAGE
CASE 732–03
20
1
20
1
N SUFFIX
PLASTIC PACKAGE
CASE 738–03
DW SUFFIX
SOIC PACKAGE
CASE 751D–04
20
1
SD SUFFIX
SSOP PACKAGE
CASE 940C–03
20
1
DT SUFFIX
TSSOP PACKAGE
CASE 948E–02
ORDERING INFORMATION
MC54HCTXXXAJ
Ceramic
MC74HCTXXXAN
Plastic
MC74HCTXXXADW SOIC
MC74HCTXXXASD SSOP
MC74HCTXXXADT TSSOP
PIN ASSIGNMENT
OUTPUT
ENABLE
Q0
D0
1
2
3
20 VCC
19 Q7
18 D7
D1 4
17 D6
Q1 5
Q2 6
D2 7
16 Q6
15 Q5
14 D5
D3 8
13 D4
Q3 9
GND 10
12 Q4
11 LATCH
ENABLE
FUNCTION TABLE
Inputs
Output
Output Latch
Enable Enable D
Q
L HH H
L HL L
L L X No Change
H XX Z
X = don’t care
Z = high impedance
REV 7

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