Philips N74F656AN, N74F656AD, N74F655AD, N74F655AN Datasheet
74F655A*
Octal buffer/driver with parity, inverting
(3-State)
74F656A
Octal buffer/driver with parity,
non-inverting (3-State)
Product specification
IC15 Data Handbook
1991 Jul 17
INTEGRATED CIRCUITS
* Discontinued part. Please see the Discontinued Product List.
Philips Semiconductors Product specification
74F655A*
74F656A
Buffers/drivers
74F655A Octal buffer/driver with parity, inverting (3-State)
74F656A Octal buffer/driver with parity, non-inverting (3-State)
2
1991 Jul 17 853-0383 03305
* Discontinued part. Please see the Discontinued Products List.
FEA TURES
•Significantly improved AC performance over 74F655 and 74F656
•High impedance NPN base input for reduced loading
(40µA in High and Low states)
•Ideal in applications where high output drive and light bus loading
are required (I
IL
is 40µA vs. FAST std of 600µA)
•74F655A combines 74F240 and 74F280A functions in one
package
•74F656A combines 74F244 and 74F280A functions in one
package
•74F655A Inverting
•74F656A Non-inverting
•3-State outputs sink 64mA and source 15mA
•24-pin plastic Slim DIP (300mil) package
•Inputs on one side and outputs on the other side simplifies PC
board layout
•Combined functions reduce part count and enhance system
performance
•Industrial temperature range available (–40°C to +85°C)
DESCRIPTION
The 74F655A and 74F656A are octal buffers and line drivers with
parity generation/checking designed to be employed as memory
address drivers, clock drivers and bus-oriented
transmitters/receivers. These parts include parity generator/checker
to improve PC board density.
TYPE
TYPICAL
PROPAGATION
DELA Y
TYPICAL SUPPL Y CURRENT
(TOT AL)
74F655A 6.5ns 64mA
74F656A 6.5ns 64mA
ORDERING INFORMATION
DESCRIPTION
COMMERCIAL RANGE
V
CC
= 5V ±10%,
T
amb
= 0°C to +70°C
INDUSTRIAL RANGE
V
CC
= 5V ±10%,
T
amb
= –40°C to +85°C
PKG DWG #
24-pin Plastic Slim
DIP (300mil)
N74F656AN I74F656AN SOT222-1
24-pin Plastic SOL N74F656AD I74F656AD SOT137-1
INPUT AND OUTPUT LOADING AND FAN-OUT TABLE
PINS DESCRIPTION
74F(U.L.)
HIGH/LOW
LOAD VALUE
HIGH/LOW
D0–D7 Data inputs 2.0/0.066 40µA/40µA
PI Parity input 1.0/0.033 20µA/20µA
OE0, OE1, OE2 Output Enable Inputs (active Low) 1.0/0.033 20µA/20µA
ΣE, ΣO Parity outputs 750/106.7 15mA/64mA
Q0–Q7 Data outputs (74F655A) 750/106.7 15mA/64mA
Q0–Q7 Data outputs (74F656A) 750/106.7 15mA/64mA
NOTE: One (1.0) FAST Unit Load (U.L.) is defined as: 20µA in the High state and 0.6mA in the Low state.
Philips Semiconductors Product specification
74F655A*
74F656A
Buffers/drivers
1991 Jul 17
3
* Discontinued part. Please see the Discontinued Products List.
PIN CONFIGURATION – 74F655A
24
23
22
21
20
19
18
17
16
15
14
1312
10
11
9
8
7
6
5
4
3
2
1
OE
0
OE
1
PI
D0
D1
D2
D3
D4
D5
D6
D7
Q
7
Q
6
Q
5
Q
4
Q
3
Q
2
Q
1
Q
0
ΣE
ΣO
VCC
GND
OE
2
SF01168
PIN CONFIGURATION – 74F656A
24
23
22
21
20
19
18
17
16
15
14
1312
10
11
9
8
7
6
5
4
3
2
1
OE
0
OE
1
PI
D0
D1
D2
D3
D4
D5
D6
D7
Q7
Q6
Q5
Q4
Q3
Q2
Q1
Q0
ΣE
ΣO
VCC
GND
OE2
SF01169
LOGIC SYMBOL – 74F655A
D0 D1 D2 D3 D4 D5 D6 D7
Q0 Q1 Q2 Q3 Q4 Q5 Q6 Q7
OE0
OE1
PI
ΣE
ΣO
4567891011
21
22
1
2
3
20 19 18 17 16 15 14 13
OE2
23
VCC=Pin 24
GND=Pin 12
SF01170
LOGIC SYMBOL – 74F656A
D0 D1 D2 D3 D4 D5 D6 D7
Q0 Q1 Q2 Q3 Q4 Q5 Q6 Q7
OE0
OE1
PI
ΣE
ΣO
4567891011
21
22
1
2
3
20 19 18 17 16 15 14 13
OE2
23
VCC=Pin 24
GND=Pin 12
SF01171
IEEE/IEC SYMBOL – 74F655A
SF01172
3
19
18
17
16
15
14
6
7
4
8
9
10
1
23
20
5
4
1311
Z5
Z6
Z7
Z8
Z9
Z10
Z11
Z12
2
EN4
≥1
P3
2K
3,5,6,7,8
9,10,11,12
3,5,6,7,8
9,10,11,12
[EVEN]
[ODD]
22
21
LOGIC SYMBOL (IEEE/IEC) – 74F656A
SF01173
3
19
18
17
16
15
14
6
7
4
8
9
10
1
23
20
5
4
1311
Z5
Z6
Z7
Z8
Z9
Z10
Z11
Z12
2
EN4
≥1
P3
2K
3,5,6,7,8
9,10,11,12
3,5,6,7,8
9,10,11,12
[EVEN]
[ODD]
22
21
Philips Semiconductors Product specification
74F655A*
74F656A
Buffers/drivers
1991 Jul 17
4
* Discontinued part. Please see the Discontinued Products List.
LOGIC DIAGRAM – 74F655A
3
4
5
6
7
8
9
10
11
2
23
20
19
18
17
16
15
14
13
21
22
Q
0
Q
1
Q
2
Q
3
Q
4
Q
5
Q
6
Q
7
ΣE
ΣO
D0
D1
D2
D3
D4
D5
D6
D7
OE1
OE
2
1
OE
0
PI
SF01174
VCC = Pin 24
GND = Pin 12
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