100344QC
器件描述：Low Power 8-Bit Latch with Cut-Off Drivers
器件厂商：FAIRCHILD [Fairchild Semiconductor]
文件大小：71.77KB，共7页
Sponsor by e络盟器件资料摘要：
© 2000 Fairchild Semiconductor Corporation DS009883 www.fairchildsemi.com
July 1988
Revised August 2000
1
00344 Low
Power 8-Bi
t Lat
c
h
wi
th Cut-
O
f
f Dri
vers
100344
Low Power 8-Bit Latch with Cut-Off Drivers
General Description
The 100344 contains eight D-type latches, individual inputs
(D
n
), outputs (Q
n
), a common enable pin (E), latch enable
(LE), and output enable pin (OEN). A Q output follows its D
input when both E and LE are LOW. When either E or LE
(or both) are HIGH, a latch stores the last valid data
present on its D input prior to E or LE going HIGH.
A HIGH on OEN holds the outputs in a cut-off state. The
cut-off state is designed to be more negative than a normal
ECL LOW level. This allows the output emitter-followers to
turn off when the termination supply is −2.0V, presenting a
high impedance to the data bus. This high impedance
reduces termination power and prevents loss of low state
noise margin when several loads share the bus.
The 100344 outputs are designed to drive a doubly termi-
nated 50Ω transmission line (25Ω load impedance). All
inputs have 50 kΩ pull-down resistors.
Features
a73 Cut-off drivers
a73 Drives 25Ω load
a73 Low power operation
a73 2000V ESD protection
a73 Voltage compensated operating range = −4.2V to −5.7V
Ordering Code:
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Connection Diagrams
24-Pin DIP 28-Pin PLCC
Logic Symbol
Order Number Package Number Package Description
100344PC N24E 24-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-010, 0.400 Wide
100344QC V28A 28-Lead Plastic Lead Chip Carrier (PLCC), JEDEC MO-047, 0.450 Square
100344QI V28A 28-Lead Plastic Lead Chip Carrier (PLCC), JEDEC MO-047, 0.450 Square
Industrial Temperature Range (−40°C to +85°C)
July 1988
Revised August 2000
1
00344 Low
Power 8-Bi
t Lat
c
h
wi
th Cut-
O
f
f Dri
vers
100344
Low Power 8-Bit Latch with Cut-Off Drivers
General Description
The 100344 contains eight D-type latches, individual inputs
(D
n
), outputs (Q
n
), a common enable pin (E), latch enable
(LE), and output enable pin (OEN). A Q output follows its D
input when both E and LE are LOW. When either E or LE
(or both) are HIGH, a latch stores the last valid data
present on its D input prior to E or LE going HIGH.
A HIGH on OEN holds the outputs in a cut-off state. The
cut-off state is designed to be more negative than a normal
ECL LOW level. This allows the output emitter-followers to
turn off when the termination supply is −2.0V, presenting a
high impedance to the data bus. This high impedance
reduces termination power and prevents loss of low state
noise margin when several loads share the bus.
The 100344 outputs are designed to drive a doubly termi-
nated 50Ω transmission line (25Ω load impedance). All
inputs have 50 kΩ pull-down resistors.
Features
a73 Cut-off drivers
a73 Drives 25Ω load
a73 Low power operation
a73 2000V ESD protection
a73 Voltage compensated operating range = −4.2V to −5.7V
Ordering Code:
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Connection Diagrams
24-Pin DIP 28-Pin PLCC
Logic Symbol
Order Number Package Number Package Description
100344PC N24E 24-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-010, 0.400 Wide
100344QC V28A 28-Lead Plastic Lead Chip Carrier (PLCC), JEDEC MO-047, 0.450 Square
100344QI V28A 28-Lead Plastic Lead Chip Carrier (PLCC), JEDEC MO-047, 0.450 Square
Industrial Temperature Range (−40°C to +85°C)