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參數(shù)資料
| 型號： | SN74ABT18640DLR |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 總線收發(fā)器 |
| 英文描述： | ABT SERIES, DUAL 9-BIT BOUNDARY SCAN TRANSCEIVER, INVERTED OUTPUT, PDSO56 |
| 封裝： | GREEN, PLASTIC, SSOP-56 |
| 文件頁數(shù)： | 8/32頁 |
| 文件大?。?/td> | 638K |
| 代理商： | SN74ABT18640DLR |
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SN54ABT18640, SN74ABT18640
SCAN TEST DEVICES
WITH 18-BIT INVERTING BUS TRANSCEIVERS
SCBS267C – FEBRUARY 1994 – REVISED JULY 1996
16
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
parallel-signature analysis (PSA)
Data appearing at the selected device input-mode I/O pins is compressed into a 36-bit parallel signature in the
shift-register elements of the selected BSCs on each rising edge of TCK. Data in the shadow latches of the
selected output-mode BSCs remains constant and is applied to the associated device I/O pins. Figures 7 and 8
show the 36-bit linear-feedback shift-register algorithms through which the signature is generated. An initial
seed value should be scanned into the BSR before performing this operation.
=
1B8-I/O
1B7-I/O
1B6-I/O
1B5-I/O
1B4-I/O
1B3-I/O
1B2-I/O
1B1-I/O
1B9-I/O
1A7-I/O
1A6-I/O
1A5-I/O
1A4-I/O
1A3-I/O
1A2-I/O
1A1-I/O
1A8-I/O
1A9-I/O
2A7-I/O
2A6-I/O
2A5-I/O
2A4-I/O
2A3-I/O
2A2-I/O
2A1-I/O
2A8-I/O
2A9-I/O
2B8-I/O
2B7-I/O
2B6-I/O
2B5-I/O
2B4-I/O
2B3-I/O
2B2-I/O
2B1-I/O
2B9-I/O
=
Figure 7. 36-Bit PSA Configuration (1OEA = 2OEA = 0, 1OEB = 2OEB = 1)
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| SN74ABT18640DLRG4 | 功能描述:特定功能邏輯 Device w/18-Bit Inv Bus Transceiver RoHS:否 制造商:Texas Instruments 產(chǎn)品: 系列:SN74ABTH18502A 工作電源電壓:5 V 封裝 / 箱體:LQFP-64 封裝:Tube |
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| SN74ABT18646PM | 功能描述:特定功能邏輯 Device w/18-Bit Bus Trnscvr & Register RoHS:否 制造商:Texas Instruments 產(chǎn)品: 系列:SN74ABTH18502A 工作電源電壓:5 V 封裝 / 箱體:LQFP-64 封裝:Tube |
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