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參數資料
| 型號： | FM574 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | Nonvolatile Octal Latch/Register |
| 中文描述： | 非易失八進制鎖存/注冊 |
| 文件頁數： | 2/10頁 |
| 文件大小： | 94K |
| 代理商： | FM574 |
Ramtron
FM573/574
27 March 2001
2/10
Figure 1. Block Diagram
S
1
S
2
D
Mux
Q
Q
D
S
1
S
2
D
Mux
Power-up Restore
Dn
C
OE
State Change
Detect
Nonvolatile Latch
Q
Q
D
L
Power
Monitor
VDD
Reference
Nonvolatile
section
Qn
Pin Description
Pin Name
Pin Number
I/O
Pin Description
/OE
1
I
Output enable. When low, the outputs are driven. When high, the outputs
are tri-stated.
Controls the latching of data according to the truth tables below.
Data in.
Data out.
Ground
Supply Voltage
C
D0-D7
Q0-Q7
VSS
VDD
11
2-9
12-19
10
20
I
I
O
I
I
Functional Tables
FM573 Table
/OE
1
X
0
0
0
1
1
1
FM574 Table
/OE
1
X
0
X
0
↑
1
↑
C
Dn
Internal
Qn
X
Qn
Dn
Dn
Output
Qn
Hi-Z
Qn
Dn
Hi-Z
Description
X
X
Dn
Dn
Tri-state outputs
Outputs enabled, hold state
Transparent
Load data, outputs tri-state
C
Dn
Internal
Qn
X
Qn
Dn
Dn
Output
Qn
Hi-Z
Qn
Dn
Hi-Z
Description
X
X
Dn
Dn
Tri-state outputs
Outputs enabled, hold state
Load data, outputs enabled
Load data, outputs tri-state
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