MC74AC646DWR(2001) 데이터 시트보기 (PDF) - ON Semiconductor
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MC74AC646DWR
(Rev.:2001)
(Rev.:2001)
ON Semiconductor
MC74AC646DWR Datasheet PDF : 12 Pages
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MC74AC646, MC74ACT646
FUNCTION TABLE
Inputs
G
DIR CAB CBA SAB SBA
Data I/O*
A0–A7
B0–B7
Operation or Function
H
X
H or L H or L
X
X
H
X
X
X
Input
Input
Isolation
Store A and B Data
L
L
X
X
X
L
L
L
X
X
X
H
Output
Input
Real Time B Data to A Bus
Stored B Data to A Bus
L
H
X
X
L
X
L
H
H or L
X
H
X
Input
Output
Real Time A Data to B Bus
Stored A Data to B Bus
*The data output functions may be enabled or disabled by various signals at the G and DIR inputs. Data input functions are always enabled;
i.e., data at the bus pins will be stored on every LOW–to–HIGH transition of the appropriate clock inputs.
NOTE: H = HIGH Voltage Level; L = LOW Voltage Level; X = Immaterial; = LOW–to–HIGH Transition
MAXIMUM RATINGS*
Symbol
Parameter
Value
Unit
VCC
Vin
Vout
Iin
Iout
ICC
Tstg
DC Supply Voltage (Referenced to GND)
DC Input Voltage (Referenced to GND)
DC Output Voltage (Referenced to GND)
DC Input Current, per Pin
DC Output Sink/Source Current, per Pin
DC VCC or GND Current per Output Pin
Storage Temperature
–0.5 to +7.0
V
–0.5 to VCC +0.5
V
–0.5 to VCC +0.5
V
±20
mA
±50
mA
±50
mA
–65 to +150
°C
*Maximum Ratings are those values beyond which damage to the device may occur. Functional operation should be restricted to the Recom-
mended Operating Conditions.
RECOMMENDED OPERATING CONDITIONS
Symbol
Parameter
Min
Typ
Max
VCC
Supply Voltage
′AC
′ACT
2.0
5.0
6.0
4.5
5.0
5.5
Vin, Vout
tr, tf
DC Input Voltage, Output Voltage (Ref. to GND)
Input Rise and Fall Time (Note 1)
′AC Devices except Schmitt Inputs
0
VCC @ 3.0 V
–
VCC @ 4.5 V
–
VCC @ 5.5 V
–
–
VCC
150
–
40
–
25
–
tr, tf
Input Rise and Fall Time (Note 2)
′ACT Devices except Schmitt Inputs
VCC @ 4.5 V
–
10
–
VCC @ 5.5 V
–
8.0
–
TJ
Junction Temperature (PDIP)
TA
Operating Ambient Temperature Range
–
–
140
–40
25
85
IOH
Output Current – High
IOL
Output Current – Low
–
–
–24
–
–
24
1. Vin from 30% to 70% VCC; see individual Data Sheets for devices that differ from the typical input rise and fall times.
2. Vin from 0.8 V to 2.0 V; see individual Data Sheets for devices that differ from the typical input rise and fall times.
Unit
V
V
ns/V
ns/V
°C
°C
mA
mA
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