參數(shù)資料
型號(hào): SN74BCT8240ADWR
廠商: TEXAS INSTRUMENTS INC
元件分類: 總線收發(fā)器
英文描述: BCT/FBT SERIES, DUAL 4-BIT BOUNDARY SCAN DRIVER, INVERTED OUTPUT, PDSO24
封裝: GREEN, PLASTIC, SOIC-24
文件頁(yè)數(shù): 10/25頁(yè)
文件大?。?/td> 414K
代理商: SN74BCT8240ADWR
SN54BCT8240A, SN74BCT8240A
SCAN TEST DEVICES
WITH OCTAL INVERTING BUFFERS
SCBS067E – FEBRUARY 1990 – REVISED DECEMBER 1996
18
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 Figure 9)
VCC = 5 V,
TA = 25°C
SN54BCT8240A
SN74BCT8240A
UNIT
MIN
MAX
MIN
MAX
MIN
MAX
fclock
Clock frequency
TCK
0
20
0
20
0
20
MHz
t
Pulse duration
TCK high or low
25
ns
tw
Pulse duration
TMS double high
50*
50
ns
Any A before TCK
6
t
Setup time
Any OE before TCK
6
ns
tsu
Setup time
TDI before TCK
6
ns
TMS before TCK
12
Any A after TCK
4.5
th
Hold time
Any OE after TCK
4.5
ns
th
Hold time
TDI after TCK
4.5
ns
TMS after TCK
0
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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