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SN74ACT8997 bảng dữ liệu(PDF) 20 Page - Texas Instruments

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Giải thích chi tiết về linh kiện  SCAN-PATH LINKERS WITH 4-BIT IDENTIFICATION BUSES SCAN-CONTROLLED IEEE STD 1149.1 JTAG TAP CONCATENATORS
PDF  28 Pages
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SN74ACT8997 bảng dữ liệu(HTML) 20 Page - Texas Instruments

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SN54ACT8997, SN74ACT8997
SCAN-PATH LINKERS WITH 4-BIT IDENTIFICATION BUSES
SCAN-CONTROLLED IEEE STD 1149.1 (JTAG) TAP CONCATENATORS
SCAS157D – APRIL 1990 – REVISED DECEMBER 1996
20
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
timing requirements over recommended ranges of supply voltage and operating free-air
temperature
SN54ACT8997
SN74ACT8997
UNIT
MIN
MAX
MIN
MAX
UNIT
f lk
Clock frequency
TCK
0
20
0
20
MHz
fclock
Clock frequency
DCI (count mode)
0
20
0
20
MHz
TCK high or low
12
12
tw
Pulse duration
DCI high or low (count mode)
7
7
ns
TRST low
7
7
TMS before TCK
↑
8
8
TDI before TCK
↑
9
9
t
Setup time
Any DTDI before TCK
↑
7
7
ns
tsu
Setup time
MCI before TCK
↑
3
3
ns
DCI before TCK
↑
3
2
Any ID before TCK
↑
2
2
TMS after TCK
↑
2
2
TDI after TCK
↑
2
2
th
Hold time
Any DTDI after TCK
↑
2
2
ns
th
Hold time
MCI after TCK
↑
4
4
ns
DCI after TCK
↑
4
4
Any ID after TCK
↑
4
4
td
Delay time
Power up to TCK
↑
100*
100
ns
* On products compliant to MIL-PRF-38535, this parameter is not production tested.



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