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PDF 54LS399 Data sheet ( Hoja de datos )
| Número de pieza | 54LS399 | |
| Descripción | QUAD 2-PORT REGISTER | |
| Fabricantes | Motorola Semiconductors | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de 54LS399 (archivo pdf) en la parte inferior de esta página. Total 4 Páginas | ||
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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)
VCC Qd Qd Iod I1d I1c I0c Qc Qc CP
20 19 18 17 16 15 14 13 12 11
SN54 / 74LS398
1 2 3 4 5 6 7 8 9 10
S Qa Qa I0a I1a I1b I0b Qb Qb GND
VCC = PIN 20
GND = PIN 10
VCC Qd I0d I1d I1c I0c Qc CP
16 15 14 13 12 11 10 9
SN54 / 74LS399
1 2 3 4 56 78
S Qa I0a I1a I1b I0b Qb GND
VCC = PIN 16
GND = PIN 8
PIN NAMES
LOADING (Note a)
HIGH
LOW
S
CP
I0a – I0d
I1a – I0d
Qa – Qd
Qa – Qd
Common Select Input
Clock (Active HIGH Going Edge) Input
Data Inputs From Source 0
Data Inputs From Source 1
Register True Outputs (Note b)
Register Complementary Outputs
(Note b)
0.5 U.L.
0.5 U.L.
0.5 U.L.
0.5 U.L.
10 U.L.
10 U.L.
0.25 U.L.
0.25 U.L.
0.25 U.L.
0.25 U.L.
5 (2.5) 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
16
1
16
1
16
1
J SUFFIX
CERAMIC
CASE 620-09
N SUFFIX
PLASTIC
CASE 648-08
D SUFFIX
SOIC
CASE 751B-03
20
1
20
1
J SUFFIX
CERAMIC
CASE 732-03
N SUFFIX
PLASTIC
CASE 738-03
20
1
DW SUFFIX
SOIC
CASE 751D-03
ORDERING INFORMATION
SN54LSXXXJ Ceramic
SN74LSXXXN Plastic
SN74LSXXXDW SOIC
SN74LSXXXD SOIC
FAST AND LS TTL DATA
5-1
1 page | ||
| Páginas | Total 4 Páginas | |
| PDF Descargar | [ Datasheet 54LS399.PDF ] | |
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