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PDF 74245 Data sheet ( Hoja de datos )
| Número de pieza | 74245 | |
| Descripción | 3-STATE Octal Bus Transceiver | |
| Fabricantes | Fairchild Semiconductor | |
| Logotipo |  |
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August 1986
Revised March 2000
DM74LS245
3-STATE Octal Bus Transceiver
General Description
These octal bus transceivers are designed for asynchro-
nous two-way communication between data buses. The
control function implementation minimizes external timing
requirements.
The device allows data transmission from the A Bus to the
B Bus or from the B Bus to the A Bus depending upon the
logic level at the direction control (DIR) input. The enable
input (G) can be used to disable the device so that the
buses are effectively isolated.
Features
s Bi-Directional bus transceiver in a high-density 20-pin
package
s 3-STATE outputs drive bus lines directly
s PNP inputs reduce DC loading on bus lines
s Hysteresis at bus inputs improve noise margins
s Typical propagation delay times, port-to-port 8 ns
s Typical enable/disable times 17 ns
s IOL (sink current)
24 mA
s IOH (source current)
−15 mA
Ordering Code:
Order Number Package Number
Package Description
DM74LS245WM
M20B
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide
DM74LS245SJ
M20D
20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
DM74LS245N
N20A
20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Connection Diagram
Function Table
Enable
G
L
L
H
H = HIGH Level
L = LOW Level
X = Irrelevant
Direction
Control
DIR
L
H
X
Operation
B Data to A Bus
A Data to B Bus
Isolation
© 2000 Fairchild Semiconductor Corporation DS006413
www.fairchildsemi.com
1 page  
Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
Package Number M20D
5 www.fairchildsemi.com
5 Page | ||
| Páginas | Total 6 Páginas | |
| PDF Descargar | [ Datasheet 74245.PDF ] | |
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