參數(shù)資料
型號(hào)： SN54LVTH182502A
廠商： Texas Instruments, Inc.
英文描述： 3.3-V ABT Scan Test Device With 18-Bit Universal Bus Transceivers(3.3VABT掃描測(cè)試裝置(18位通用總線收發(fā)器))
中文描述： 的3.3V ABT生根粉掃描測(cè)試設(shè)備與18位通用總線收發(fā)器（3.3VABT掃描測(cè)試裝置（18位通用總線收發(fā)器））
文件頁(yè)數(shù)： 32/35頁(yè)
文件大?。?/td> 806K
代理商： SN54LVTH182502A
SN54LVTH18502A, SN54LVTH182502A, SN74LVTH18502A, SN74LVTH182502A
3.3-V ABT SCAN TEST DEVICES
WITH 18-BIT UNIVERSAL BUS TRANSCEIVERS
SCBS668A – JULY 1996 – REVISED DECEMBER 1996
32
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
timing requirements over recommended operating free-air temperature range (unless otherwise
noted) (normal mode) (see Figure 14)
SN54LVTH182502A
VCC = 3.3 V
±
0.3 V
SN74LVTH182502A
VCC = 3.3 V
±
0.3 V
UNIT
VCC = 2.7 V
VCC = 2.7 V
MIN
MAX
MIN
MAX
MIN
MAX
MIN
MAX
fclock
Clock frequency
CLKAB or CLKBA
0
100
0
80
0
100
0
80
MHz
tw
Pulse duration
CLKAB or CLKBA high or low
4.4
5.6
4.4
5.6
ns
LEAB or LEBA high
A before CLKAB
↑
or
B before CLKBA
↑
3
3
3
3
tsu
Setup time
2.8
3
2.8
3
ns
A before LEAB
↓
or
B before LEBA
↓
A after CLKAB
↑
or
B after CLKBA
↑
A after LEAB
↓
or B after LEBA
↓
CLK high
1.5
0.7
1.5
0.7
CLK low
1.6
1.6
1.6
1.6
th
Hold time
1.4
1.1
1.4
1.1
ns
3.1
3.5
3.1
3.5
timing requirements over recommended operating free-air temperature range (unless otherwise
noted) (test mode) (see Figure 14)
SN54LVTH182502A
VCC = 3.3 V
±
0.3 V
SN74LVTH182502A
VCC = 3.3 V
±
0.3 V
UNIT
VCC = 2.7 V
VCC = 2.7 V
MIN
MAX
MIN
MAX
MIN
MAX
MIN
MAX
fclock
tw
Clock frequency
TCK
0
50
0
40
0
50
0
40
MHz
Pulse duration
TCK high or low
9.5
10.5
9.5
10.5
ns
tsu
Setup time
A, B, CLK, LE, or
OE before TCK
↑
TDI before TCK
↑
TMS before TCK
↑
A, B, CLK, LE, or
OE after TCK
↑
TDI after TCK
↑
TMS after TCK
↑
Power up to TCK
↑
VCC power up
6.5
7
6.5
7
ns
2.5
3.5
2.5
3.5
2.5
3.5
2.5
3.5
th
Hold time
1.5
1
1.5
1
ns
1.5
1
1.5
1
1.5
1
1.5
1
td
tr
Delay time
50
50
50
50
ns
μ
s
Rise time
1
1
1
1
PRODUCT PREVIEW information concerns products in the formative or
design phase of development. Characteristic data and other
specifications are design goals. Texas Instruments reserves the right to
change or discontinue these products without notice.
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