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SN74ABT18646 bảng dữ liệu(PDF) 8 Page - Texas Instruments

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tên linh kiện SN74ABT18646
Giải thích chi tiết về linh kiện  WITH 18-BIT TRANSCEIVER AND REGISTER
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SN74ABT18646 bảng dữ liệu(HTML) 8 Page - Texas Instruments

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SN74ABT18646
SCAN TEST DEVICE
WITH 18-BIT TRANSCEIVER AND REGISTER
SCBS131A – AUGUST 1992 – REVISED JANUARY 2002
8
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
timing requirements over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted) (test mode) (see Note 4 and Figure 2)123
MIN
MAX
UNIT
fclock
Clock frequency
TCK
50
MHz
tw
Pulse duration
TCK high or low
8
ns
A, B, CLK, DIR, OE, or S before TCK
4.5
tsu
Setup time
TDI before TCK
7.5
ns
TMS before TCK
3
A or B after TCK
0.5
th
Hold time
CLK, DIR, OE, or S after TCK
0
ns
th
Hold time
TDI after TCK
0.5
ns
TMS after TCK
0.5
td
Delay time
Power up to TCK
50
ns
tr
Rise time
VCC power up
1
µs
NOTE 4: Preliminary specifications based on SPICE analysis
switching characteristics over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted) (normal mode) (see Note 4 and Figure 2)
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
MIN
MAX
UNIT
fmax
CLKAB or CLKBA
100
MHz
tPLH
AorB
BorA
2
5.4
ns
tPHL
A or B
B or A
2
6.6
ns
tPLH
CLKAB or CLKBA
BorA
2.5
8
ns
tPHL
CLKAB or CLKBA
B or A
2.5
7.4
ns
tPLH
SAB or SBA
BorA
2
7.5
ns
tPHL
SAB or SBA
B or A
2
8
ns
tPZH
DIR
BorA
2
8
ns
tPZL
DIR
B or A
3
9.1
ns
tPZH
OE
BorA
2.5
8.6
ns
tPZL
OE
B or A
3
9.3
ns
tPHZ
DIR
BorA
3.5
11.1
ns
tPLZ
DIR
B or A
3
8.8
ns
tPHZ
OE
BorA
3.5
10.5
ns
tPLZ
OE
B or A
2
8.5
ns
NOTE 4: Preliminary specifications based on SPICE analysis


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