Datenblatt-pdf.com


DM74AS651 Schematic ( PDF Datasheet ) - Fairchild Semiconductor

Teilenummer DM74AS651
Beschreibung DM74AS651
Hersteller Fairchild Semiconductor
Logo Fairchild Semiconductor Logo 




Gesamt 8 Seiten
DM74AS651 Datasheet, Funktion
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






DM74AS651 Datasheet, Funktion
DM74AS652 Switching Characteristics
Symbol
Parameter
Conditions
From
To Min
fMAX
tPLH
tPHL
tPLH
tPHL
tPLH
tPHL
tPZH
tPZL
tPHZ
tPLZ
tPZH
tPZL
tPHZ
tPLZ
Maximum Clock Frequency
Propagation Delay Time
LOW-to-HIGH Level Output
Propagation Delay Time
HIGH-to-LOW Level Output
Propagation Delay Time
LOW-to-HIGH Level Output
Propagation Delay Time
HIGH-to-LOW Level Output
Propagation Delay Time
LOW-to-HIGH Level Output
Propagation Delay Time
HIGH-to-LOW Level Output
Output Enable Time
to HIGH Level Output
Output Enable Time
to LOW Level Output
Output Disable Time
from HIGH Level Output
Output Disable Time
from LOW Level Output
Output Disable Time
to HIGH Level Output
Output Disable Time
to LOW Level Output
Output Disable Time
from HIGH Level Output
Output Disable Time
from LOW Level Output
VCC = 4.5V to 5.5V
R1 = R2 = 500
CL = 50 pF
CBA or CAB
A or B
A or B
B or A
SBA or SAB
(Note 5)
A or B
Enable GBA
A
Enable GAB
B
90
2
2
2
1
2
2
2
3
2
2
3
3
2
2
Note 5: These parameters are measured with the internal output state of the storage register opposite to that of the bus input.
Max
8.5
9
9
7
11
9
10
16
9
9
11
16
10
11
Units
MHz
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
www.fairchildsemi.com
6

6 Page







SeitenGesamt 8 Seiten
PDF Download[ DM74AS651 Schematic.PDF ]

Link teilen




Besondere Datenblatt

TeilenummerBeschreibungHersteller
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
DM74AS652NTOctal Bus Transceiver and RegisterFairchild Semiconductor
Fairchild Semiconductor

TeilenummerBeschreibungHersteller
CD40175BC

Hex D-Type Flip-Flop / Quad D-Type Flip-Flop.

Fairchild Semiconductor
Fairchild Semiconductor
KTD1146

EPITAXIAL PLANAR NPN TRANSISTOR.

KEC
KEC


www.Datenblatt-PDF.com       |      2020       |      Kontakt     |      Suche