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74AC373SC 반도체 회로 부품 판매점

Octal Transparent Latch with 3-STATE Outputs



Fairchild Semiconductor 로고
Fairchild Semiconductor
74AC373SC 데이터시트, 핀배열, 회로
November 1988
Revised November 1999
74AC373 74ACT373
Octal Transparent Latch with 3-STATE Outputs
General Description
The AC/ACT373 consists of eight latches with 3-STATE
outputs for bus organized system applications. The flip-
flops appear transparent to the data when Latch Enable
(LE) is HIGH. When LE is LOW, the data that meets the
setup time is latched. Data appears on the bus when the
Output Enable (OE) is LOW. When OE is HIGH, the bus
output is in the high impedance state.
Features
s ICC and IOZ reduced by 50%
s Eight latches in a single package
s 3-STATE outputs for bus interfacing
s Outputs source/sink 24 mA
s ACT373 has TTL-compatible inputs
Ordering Code:
Order Number Package Number
Package Description
74AC373SC
M20B
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300Wide Body
74AC373SJ
M20D
20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
74AC373MTC
MTC20
20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
74AC373PC
N20A
20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300Wide
74ACT373SC
M20B
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300Wide Body
74ACT373SJ
M20D
20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
74ACT373MSA
74ACT373MTC
MSA20
MTC20
20-Lead Shrink Swmwwa.lDl aOtauSthlieneet4UP.caocmkage (SSOP), EIAJ TYPE II, 5.3mm Wide
20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
74ACT373PC
N20A
20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300Wide
Device also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering information
Logic Symbols
Connection Diagram
IEEE/IEC
Pin Descriptions
Pin Names
D0D7
LE
OE
O0O7
Description
Data Inputs
Latch Enable Input
Output Enable Input
3-STATE Latch Outputs
FACTis a trademark of Fairchild Semiconductor Corporation.
© 1999 Fairchild Semiconductor Corporation DS009958
www.fairchildsemi.com


74AC373SC 데이터시트, 핀배열, 회로
Functional Description
The AC/ACT373 contains eight D-type latches with 3-
STATE standard outputs. When the Latch Enable (LE)
input is HIGH, data on the Dn inputs enters the latches. In
this condition the latches are transparent, i.e., a latch out-
put will change state each time its D-type input changes.
When LE is LOW, the latches store the information that
was present on the D-type inputs a setup time preceding
the HIGH-to-LOW transition of LE. The 3-STATE standard
outputs are controlled by the Output Enable (OE) input.
When OE is LOW, the standard outputs are in the 2-state
mode. When OE is HIGH, the standard outputs are in the
high impedance mode but this does not interfere with
entering new data into the latches.
Logic Diagram
Truth Table
Inputs
Outputs
LE OE Dn
XHX
On
Z
HL L
L
HLH
H
LLX
O0
H = HIGH Voltage Level
L = LOW Voltage Level
Z = High Impedance
X = Immaterial
O0 = Previous O0 before HIGH-to-LOW transition of Latch Enable
Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays.
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