MC74HC244A Datasheet, PDF (1/8 Pages) ON Semiconductor – Octal 3-State Noninverting Buffer/Line Driver/Line Receiver

MC74HC244A
Octal 3-State Noninverting
Buffer/Line Driver/
Line Receiver
High–Performance Silicon–Gate CMOS
The MC74HC244A is identical in pinout to the LS244. The device
inputs are compatible with standard CMOS outputs; with pullup
resistors, they are compatible with LSTTL outputs.
This octal noninverting buffer/line driver/line receiver is designed
to be used with 3–state memory address drivers, clock drivers, and
other bus–oriented systems. The device has noninverting outputs and
two active–low output enables.
The HC244A is similar in function to the HC240A.
• Output Drive Capability: 15 LSTTL Loads
• Outputs Directly Interface to CMOS, NMOS, and TTL
• Operating Voltage Range: 2 to 6 V
• Low Input Current: 1 µA
• High Noise Immunity Characteristic of CMOS Devices
• In Compliance with the Requirements Defined by JEDEC Standard
No. 7A
• Chip Complexity: 136 FETs or 34 Equivalent Gates
LOGIC DIAGRAM
A1 ²
18 _YA1
A2 ⁴
16 _YA2
A3 ⁶
14 _YA3
DATA
INPUTS
A4 ⁸
B1 ¹¹
12 _YA4
NONINVERTING
9 _YB1 ^OUTPUTS
B2 ¹³
7 _YB2
B3 ¹⁵
5 _YB3
B4 ¹⁷
3 _YB4
OUTPUT ENABLE A ¹
ENABLES _{ENABLE B} ¹⁹
PIN 20 = VCC
PIN 10 = GND
FUNCTION TABLE
Inputs
Outputs
Enable A,
Enable B A, B YA, YB
L
L
L
L
H
H
H
X
Z
Z = high impedance
http://onsemi.com
20
1
20
1
PDIP–20
N SUFFIX
CASE 738
SOIC WIDE–20
DW SUFFIX
CASE 751D
MARKING
DIAGRAMS
20
MC74HC244AN
AWLYYWW
1
20
HC244A
AWLYYWW
1 ₂₀
20
1
TSSOP–20
DT SUFFIX
CASE 948G
HC
244A
ALYW
1
A = Assembly Location
WL = Wafer Lot
YY = Year
WW = Work Week
PIN ASSIGNMENT
ENABLE A 1
A1 2
YB4 3
A2 4
YB3 5
A3 6
YB2 7
A4 8
YB1 9
GND 10
20 VCC
19 ENABLE B
18 YA1
17 B4
16 YA2
15 B3
14 YA3
13 B2
12 YA4
11 B1
ORDERING INFORMATION
Device
Package Shipping
MC74HC244AN
PDIP–20 1440 / Box
MC74HC244ADW
SOIC–WIDE 38 / Rail
MC74HC244ADWR2 SOIC–WIDE 1000 / Reel
MC74HC244ADT
TSSOP–20 75 / Rail
MC74HC244ADTR2 TSSOP–20 2500 / Reel
© Semiconductor Components Industries, LLC, 2000
1
March, 2000 – Rev. 8
Publication Order Number:
MC74HC244A/D