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HCT273 Datasheet PDF : 8 Pages
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MC74HCT273A
Octal D Flip-Flop with
Common Clock and Reset
with LSTTL-Compatible
Inputs
High–Performance Silicon–Gate CMOS
The MC74HCT273A may be used as a level converter for
interfacing TTL or NMOS outputs to High–Speed CMOS inputs.
The HCT273A is identical in pinout to the LS273.
This device consists of eight D flip–flops with common Clock and
Reset inputs. Each flip–flop is loaded with a low–to–high transition of
the Clock input. Reset is asynchronous and active low.
• Output Drive Capability: 10 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: 284 FETs or 71 Equivalent Gates
LOGIC DIAGRAM
DATA
INPUTS
D0 3
D1 4
D2 7
D3 8
D4 13
D5 14
D6 17
D7 18
CLOCK 11
2 Q0
5 Q1
6 Q2
9 Q3
12 Q4
15 Q5
16 Q6
19 Q7
NONINVERTING
OUTPUTS
RESET 1
PIN 20 = VCC
PIN 10 = GND
FUNCTION TABLE
Inputs
Output
Reset Clock D
Q
L
X
X
L
H
H
H
H
L
L
H
L
X No Change
H
X No Change
X = Don’t Care
Z = High Impedance
http://onsemi.com
20
1
20
1
PDIP–20
N SUFFIX
CASE 738
MARKING
DIAGRAMS
20
MC74HCT273AN
AWLYYWW
SOIC WIDE–20
DW SUFFIX
CASE 751D
1
20
HCT273A
AWLYYWW
1
A = Assembly Location
WL = Wafer Lot
YY = Year
WW = Work Week
PIN ASSIGNMENT
RESET 1
Q0 2
D0 3
D1 4
Q1 5
Q2 6
D2 7
D3 8
Q3 9
GND 10
20 VCC
19 Q7
18 D7
17 D6
16 Q6
15 Q5
14 D5
13 D4
12 Q4
11 CLOCK
ORDERING INFORMATION
Device
Package Shipping
MC74HCT273AN
PDIP–20 1440 / Box
MC74HCT273ADW SOIC–WIDE 38 / Rail
MC74HCT273ADWR2 SOIC–WIDE 1000 / Reel
© Semiconductor Components Industries, LLC, 2000
1
March, 2000 – Rev. 8
Publication Order Number:
MC74HCT273A/D
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