July 1988
Revised August 2000
100323
Low Power Hex Bus Driver
General Description
The 100323 is a monolithic device containing six bus drivers capable of driving terminated lines with terminations as low as 25Ω . To reduce crosstalk, each output has its own respective ground connection. Transition times were designed to be longer than on other F100K devices. The driver itself performs the positive logic AND of a data input (D1–D6) and the OR of two select inputs (E and either DE1, DE2, or DE3).
Enabling of data is possible in multiples of two, i.e., 2, 4 or all 6 paths. All inputs have 50 kΩ pull-down resistors.
The output voltage LOW level is designed to be more negative than normal ECL outputs (cut off state). This allows an emitter-follower output transistor to turn OFF when the termination supply is − 2.0V and thus present a high impedance to the data bus.
Features
■50% power reduction of the 100123
■2000V ESD protection
■− 4.2V to − 5.7V operating range
■Drives 25Ω load
Ordering Code:
Order Number |
Package Number |
Package Description |
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100323PC |
N24E |
24-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-010, 0.400 Wide |
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100323QC |
V28A |
28-Lead Plastic Lead Chip Carrier (PLCC), JEDEC MO-047, 0.450 Square |
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Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Logic Symbol |
Connection Diagrams |
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24-Pin DIP |
Pin Descriptions
Pin Names |
Description |
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D1–D6 |
Data Inputs |
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DE1–DE3 |
Dual Enable Inputs |
28-Pin PLCC |
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E |
Common Enable Input |
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O1–O6 |
Data Outputs |
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Driver Bus Hex Power Low 100323
© 2000 Fairchild Semiconductor Corporation |
DS009877 |
www.fairchildsemi.com |
100323
Truth Table
E |
DEn |
Dn |
Dn+ 1 |
On |
On+ 1 |
L |
L |
X |
X |
Cutoff |
Cutoff |
X |
H |
L |
L |
Cutoff |
Cutoff |
X |
H |
L |
H |
Cutoff |
H |
X |
H |
H |
L |
H |
Cutoff |
X |
H |
H |
H |
H |
H |
H |
X |
L |
L |
Cutoff |
Cutoff |
H |
X |
L |
H |
Cutoff |
H |
H |
X |
H |
L |
H |
Cutoff |
H |
X |
H |
H |
H |
H |
H = HIGH Voltage Level
L = LOW Voltage Level
X = Don’t Care
Cutoff = Lower-than-LOW State
Logic Diagram
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2 |
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