參數(shù)資料
型號: 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
文件頁數(shù): 7/25頁
文件大?。?/td> 414K
代理商: SN74BCT8240ADWR
SN54BCT8240A, SN74BCT8240A
SCAN TEST DEVICES
WITH OCTAL INVERTING BUFFERS
SCBS067E – FEBRUARY 1990 – REVISED DECEMBER 1996
15
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
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T
est-Logic-Reset
Run-T
est/Idle
Select-DR-Scan
Select-IR-Scan
Capture-IR
Shift-IR
Exit1-IR
Update-IR
Select-DR-Scan
Capture-DR
Shift-DR
Exit1-DR
Update-DR
Select-DR-Scan
Select-IR-Scan
T
est-Logic-Reset
TCK
TMS
TDI
TDO
TAP
Controller
State
3-State (TDO) or Don’t Care (TDI)
Figure 8. Timing Example
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage range, VCC
–0.5 V to 7 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input voltage range, VI: except TMS (see Note 1)
–0.5 V to 7 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TMS (see Note 1)
–0.5 V to 12 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Voltage range applied to any output in the disabled or power-off state
–0.5 V to 5.5 V
. . . . . . . . . . . . . . . . . . . .
Voltage range applied to any output in the high state
–0.5 V to VCC
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input clamp current, IIK
–30 mA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Current into any output in the low state: SN54BCT8240A (TDO)
40 mA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SN54BCT8240A (any Y)
96 mA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SN74BCT8240A (TDO)
48 mA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SN74BCT8240A (any Y)
128 mA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maximum power dissipation at TA = 55°C (in still air) (see Note 2): DW package
1.7 W
. . . . . . . . . . . . . . . . . .
NT package
1.3 W
. . . . . . . . . . . . . . . . . . .
Storage temperature range, Tstg
–65
°C to 150°C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTES:
1. The input voltage rating may be exceeded if the input clamp-current rating is observed.
2. The maximum package power dissipation is calculated using a junction temperature of 150
°C and a board trace length of 750 mils,
except for the NT package, which has trace length of zero. For more information, refer to the
Package Thermal Considerations
application note in the
ABT Advanced BiCMOS Technology Data Book, literature number SCBD002.
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