DataSheet.es    


PDF DM74AS651 Data sheet ( Hoja de datos )

Número de pieza DM74AS651
Descripción Octal Bus Transceiver and Register
Fabricantes Fairchild Semiconductor 
Logotipo Fairchild Semiconductor Logotipo



Hay una vista previa y un enlace de descarga de DM74AS651 (archivo pdf) en la parte inferior de esta página.


Total 8 Páginas

No Preview Available ! DM74AS651 Hoja de datos, Descripción, Manual

October 1986
Revised March 2000
DM74AS651 • DM74AS652
Octal Bus Transceiver and Register
General Description
These devices incorporate an octal transceiver and an
octal D-type register configured to enable transmission of
data from bus to bus or internal register to bus. The
DM74AS651 offers 64-Industrial grade product guarantee-
ing performance from 40°C to +85°C.
These bus transceivers feature totem-pole 3-STATE out-
puts designed specifically for driving highly-capacitive or
relatively low-impedance loads. The high-impedance state
and increased high-logic-level drive provide these devices
with the capability of being connected directly to and driv-
ing the bus lines in a bus-organized system without need
for interface or pull-up components. They are particularly
attractive for implementing buffer registers, I/O ports, bidi-
rectional bus drivers, and working registers.
The registers in the DM74AS651 and DM74AS652 are
edge-triggered D-type flip-flops. On the positive transition
of the clock (CAB or CBA), the input data is stored.
The SAB and SBA control pins are provided to select
whether real-time data or stored data is transferred. A LOW
input level selects real-time data and a HIGH level selects
stored data. The select controls have a “make before
break” configuration to eliminate a glitch which would nor-
mally occur in a typical multiplexer during the transition
between stored and real-time data.
The Enable (GAB and GBA) control pins provide four
modes of operation; real-time data transfer from bus A-to-
B, real-time data transfer from bus B-to-A, real-time bus A
and/or B data transfer to internal storage, or internal stored
data transfer to bus A and/or B.
Features
s Switching specifications at 50 pF
s Switching specifications guaranteed over full tempera-
ture and VCC range
s Advanced oxide-isolated, ion-implanted Schottky TTL
process
s 3-STATE buffer-type outputs drive bus lines directly
s Guaranteed performance over industrial temperature
range (40°C to +85°C) in 64-grade products
Ordering Code:
Order Number Package Number
Package Description
DM74AS651WM
M24B
24-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide
DM74AS651NT
N24C
24-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-100, 0.300 Wide
DM74AS652WM
M24B
24-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide
DM74AS652NT
N24C
24-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-100, 0.300 Wide
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
© 2000 Fairchild Semiconductor Corporation DS006325
www.fairchildsemi.com

1 page




DM74AS651 pdf
DM74AS651 Switching Characteristics
Symbol
Parameter
Conditions
From
To Min
fMAX
tPLH
tPHL
Maximum Clock Frequency
Propagation Delay Time
LOW-to-HIGH Level Output
Propagation Delay Time
HIGH-to-LOW Level Output
VCC = 4.5V to 5.5V
R1 = R2 = 500
CL = 50 pF
CBA or CAB
A or B
90
2
2
tPLH Propagation Delay Time
LOW-to-HIGH Level Output
tPHL Propagation Delay Time
HIGH-to-LOW Level Output
A or B
B or A
2
1
tPLH Propagation Delay Time
LOW-to-HIGH Level Output
SBA or SAB
A or B
2
tPHL Propagation Delay Time
HIGH-to-LOW Level Output
(Note 4)
2
tPZH Output Enable Time
to HIGH Level Output
2
tPZL Output Enable Time
to LOW Level Output
tPHZ Output Disable Time
from HIGH Level Output
Enable GBA
A
3
2
tPLZ Output Disable Time
from LOW Level Output
2
tPZH Output Disable Time
to HIGH Level Output
3
tPZL Output Disable Time
to LOW Level Output
tPHZ Output Disable Time
from HIGH Level Output
Enable GAB
B
3
2
tPLZ Output Disable Time
from LOW Level Output
2
Note 4: These parameters are measured with the internal output state of the storage register opposite to that of the bus input.
Max
8.5
Units
MHz
ns
9 ns
8 ns
7 ns
11 ns
9 ns
10 ns
16 ns
9 ns
9 ns
11 ns
16 ns
10 ns
11 ns
5 www.fairchildsemi.com

5 Page










PáginasTotal 8 Páginas
PDF Descargar[ Datasheet DM74AS651.PDF ]




Hoja de datos destacado

Número de piezaDescripciónFabricantes
DM74AS651Octal Bus Transceiver and RegisterFairchild Semiconductor
Fairchild Semiconductor
DM74AS651DM74AS651Fairchild Semiconductor
Fairchild Semiconductor
DM74AS651NTOctal Bus Transceiver and RegisterFairchild Semiconductor
Fairchild Semiconductor
DM74AS651WMOctal Bus Transceiver and RegisterFairchild Semiconductor
Fairchild Semiconductor

Número de piezaDescripciónFabricantes
SLA6805M

High Voltage 3 phase Motor Driver IC.

Sanken
Sanken
SDC1742

12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters.

Analog Devices
Analog Devices


DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares,
permitiéndote verlos en linea o descargarlos en PDF.


DataSheet.es    |   2020   |  Privacy Policy  |  Contacto  |  Buscar