Data sheet acquired from Harris Semiconductor
SCHS167
CD74HC240, CD74HCT240,
CD74HC241, CD74HCT241,
CD74HC244, CD74HCT244
High Speed CMOS Logic
Octal Buffer/Line Drivers, Three-State
November 1997
Features
鈥?CD74HC/HCT240 Inverting
[ /Title
(CD74
HC240
,
CD74
HCT24
0,
CD74
HC241
,
CD74
HCT24
1,
CD74
HC244
,
CD74
鈥?CD74HC/HCT241 Non-Inverting
鈥?CD74HC/HCT244 Non-Inverting
鈥?Typical Propagation Delay = 8ns at V
CC
= 5V,
C
L
= 15pF, T
A
= 25
o
C for HC240
鈥?Three-State Outputs
鈥?Buffered Inputs
鈥?High-Current Bus Driver Outputs
鈥?Fanout (Over Temperature Range)
- Standard Outputs . . . . . . . . . . . . . . . 10 LSTTL Loads
- Bus Driver Outputs . . . . . . . . . . . . . 15 LSTTL Loads
鈥?Wide Operating Temperature Range . . . -55
o
C to 125
o
C
鈥?Balanced Propagation Delay and Transition Times
鈥?Signi铿乧ant Power Reduction Compared to LSTTL
Logic ICs
鈥?HC Types
- 2V to 6V Operation
- High Noise Immunity: N
IL
= 30%, N
IH
= 30% of V
CC
at V
CC
= 5V
鈥?HCT Types
- 4.5V to 5.5V Operation
- Direct LSTTL Input Logic Compatibility,
V
IL
= 0.8V (Max), V
IH
= 2V (Min)
- CMOS Input Compatibility, I
l
鈮?/div>
1碌A at V
OL
, V
OH
Pinout
CD74HC240, CD74HCT240, CD74HC241, CD74HCT241,
CD74HC244, CD74HCT244
(PDIP, SOIC)
TOP VIEW
240
1OE
1A0
2Y3
1A1
2Y2
1A2
2Y1
1A3
2Y0
GND
241
244
1OE
1A0
2Y3
1A1
2Y2
1A2
2Y1
1A3
2Y0
1
2
3
4
5
6
7
8
9
241
244
20 V
CC
18 1Y0
17 2A3
16 1Y1
15 2A2
14 1Y2
13 2A1
12 1Y3
11 2A0
240
V
CC
1Y0
2A3
1Y1
2A2
1Y2
2A1
1Y3
2A0
19 2OE (241) 2OE (240, 244)
GND 10
CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures.
Copyright
漏
Harris Corporation 1997
File Number
1656.1
1