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參數(shù)資料
| 型號： | SN74ABT18502PM |
| 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 REG TRANSCEIVER, TRUE OUTPUT, PQFP64 |
| 封裝： | GREEN, PLASTIC, LQFP-64 |
| 文件頁數(shù)： | 13/32頁 |
| 文件大小： | 578K |
| 代理商： | SN74ABT18502PM |
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SN74ABT18502
SCAN TEST DEVICE
WITH 18-BIT REGISTERED BUS TRANSCEIVER
SCBS753 – FEBRUARY 2002
20
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
simultaneous PSA and COUNT (PSA/COUNT)
Data appearing at the selected device input pins is compressed into an 18-bit parallel signature in the
shift-register elements of the selected input BSCs on each rising edge of TCK. This data is updated in the
shadow latches of the selected input BSCs and applied to the inputs of the normal on-chip logic. At the same
time, an 18-bit binary count-up pattern is generated in the shift-register elements of the selected output BSCs
on each rising edge of TCK, updated in the shadow latches, and applied to the associated device output pins
on each falling edge of TCK. Figures 10 and 11 show the 18-bit linear-feedback shift-register algorithms through
which the signature is generated. An initial seed value should be scanned into the BSR prior to performing this
operation.
=
MASKX.X
1B8-O
1B7-O
1B6-O
1B5-O
1B4-O
1B3-O
1B2-O
1B1-O
1B9-O
1A7-I
1A6-I
1A5-I
1A4-I
1A3-I
1A2-I
1A1-I
1A8-I
1A9-I
2A7-I
2A6-I
2A5-I
2A4-I
2A3-I
2A2-I
2A1-I
2A8-I
2A9-I
2B8-O
2B7-O
2B6-O
2B5-O
2B4-O
2B3-O
2B2-O
2B1-O
2B9-O
=
MSB
LSB
Figure 10. 18-Bit PSA/COUNT Configuration (1OEAB = 2OEAB = 0, 1OEBA = 2OEBA = 1)
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| SN74ABT18504PMRG4 | ABT SERIES, 20-BIT BOUNDARY SCAN REG TRANSCEIVER, TRUE OUTPUT, PQFP64 |
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| SN74ABT18640DLR | ABT SERIES, DUAL 9-BIT BOUNDARY SCAN TRANSCEIVER, INVERTED OUTPUT, PDSO56 |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SN74ABT18502PMG4 | 功能描述:特定功能邏輯 W/18-Bit Univ Bus Trncvr 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 |
| SN74ABT18502PMR | 功能描述:特定功能邏輯 W/18-Bit Univ Bus Trncvr 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 |
| SN74ABT18502PMRG4 | 功能描述:特定功能邏輯 W/18-Bit Univ Bus Trncvr 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 |
| SN74ABT18502PN | 制造商:TI 功能描述:74ABT18502 S1A4B |
| SN74ABT18504 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:SCAN TEST DEVICES WITH 20-BIT UNIVERSAL BUS TRANSCEIVERS |
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