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SN74LS398DW датащи(PDF) 1 Page - Motorola, Inc

номер детали SN74LS398DW
подробное описание детали  QUAD 2-PORT REGISTER
Download  6 Pages
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производитель  MOTOROLA [Motorola, Inc]
домашняя страница  http://www.freescale.com
Logo MOTOROLA - Motorola, Inc

SN74LS398DW датащи(HTML) 1 Page - Motorola, Inc

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FAST AND LS TTL DATA
QUAD 2-PORT REGISTER
The SN54 / 74LS398 and SN54 / 74LS399 are Quad 2-Port Registers. They
are the logical equivalent of a quad 2-input multiplexer followed by a quad 4-bit
edge-triggered register. A Common Select input selects between two 4-bit in-
put ports (data sources). The selected data is transferred to the output register
on the LOW-to-HIGH transition of the Clock input. The SN54/ 74LS398 fea-
tures both Q and Q inputs, while the SN54 / 74LS399 has only Q outputs.
Select From Two Data Sources
Fully Positive Edge-Triggered Operation
Both True and Complemented Outputs on SN54/74LS398
Input Clamp Diodes Limit High-Speed Termination Effects
CONNECTION DIAGRAM DIP (TOP VIEW)
18
17
16
15
14
13
1
2
3
4
5
6
7
20
19
8
VCC
S
Qd Qd Iod I1d
I0c
I1c
Qc
Qa Qa I0a I1a I1b I0b Qb
9
10
Qb GND
12
11
Qc CP
VCC = PIN 20
GND = PIN 10
SN54 / 74LS398
14
13
12
11
10
9
1
2
3
4
5
6
7
16
15
8
VCC
S
Qd
I0d
I1d
I1c
Qc
I0c
CP
Qa
I0a
I1a
I1b I0b
Qb GND
VCC = PIN 16
GND = PIN 8
SN54 / 74LS399
PIN NAMES
LOADING (Note a)
HIGH
LOW
S
Common Select Input
0.5 U.L.
0.25 U.L.
CP
Clock (Active HIGH Going Edge) Input
0.5 U.L.
0.25 U.L.
I0a – I0d Data Inputs From Source 0
0.5 U.L.
0.25 U.L.
I1a – I0d Data Inputs From Source 1
0.5 U.L.
0.25 U.L.
Qa – Qd
Register True Outputs (Note b)
10 U.L.
5 (2.5) U.L.
Qa – Qd
Register Complementary Outputs
(Note b)
10 U.L.
5 (2.5) U.L.
NOTES:
a) 1 TTL Unit Load (U.L.) = 40
µA HIGH/1.6 mA LOW.
b) The Output LOW drive factor is 2.5 U.L. for Military (54) and 5 U.L. for Commercial
(74) Temperature Ranges.
SN54/74LS398
SN54/74LS399
QUAD 2-PORT REGISTER
LOW POWER SCHOTTKY
ORDERING INFORMATION
SN54LSXXXJ
Ceramic
SN74LSXXXN
Plastic
SN74LSXXXDW SOIC
SN74LSXXXD
SOIC
J SUFFIX
CERAMIC
CASE 620-09
N SUFFIX
PLASTIC
CASE 648-08
16
1
16
1
16
1
D SUFFIX
SOIC
CASE 751B-03
20
1
J SUFFIX
CERAMIC
CASE 732-03
20
1
N SUFFIX
PLASTIC
CASE 738-03
20
1
DW SUFFIX
SOIC
CASE 751D-03


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