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參數(shù)資料
| 型號： | SN54LVTH18504AHV |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 總線收發(fā)器 |
| 英文描述： | LVT SERIES, 20-BIT BOUNDARY SCAN REG TRANSCEIVER, TRUE OUTPUT, CQFP68 |
| 封裝： | CERAMIC, QFP-68 |
| 文件頁數(shù)： | 4/40頁 |
| 文件大?。?/td> | 594K |
| 代理商： | SN54LVTH18504AHV |
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SN54LVTH18504A, SN54LVTH182504A, SN74LVTH18504A, SN74LVTH182504A
3.3-V ABT SCAN TEST DEVICES
WITH 20-BIT UNIVERSAL BUS TRANSCEIVERS
SCBS667B – JULY 1996 – REVISED JUNE 1997
12
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
device-identification register
The device-identification register (IDR) is 32 bits long. It can be selected and read to identify the manufacturer,
part number, and version of this device.
For the ’LVTH18504A, either of the binary values 00100000000000011101000000101111 (2001D02F, hex) or
00110000000000011101000000101111 (3001D02F, hex) is captured (during Capture-DR state) in the IDR to
identify this device as TI SN54/74LVTH18504A.
For the ’LVTH182504A, either of the binary values 00010000000000100010000000101111 (1002202F, hex)
or 00100000000000100010000000101111 (2002202F, hex) is captured (during Capture-DR state) in the IDR
to identify this device as TI SN54/74LVTH182504A.
The IDR order of scan is from TDI through bits 31–0 to TDO. Table 2 shows the IDR bits and their significance.
Table 2. Device-Identification Register Configuration
IDR BIT
NUMBER
IDENTIFICATION
SIGNIFICANCE
IDR BIT
NUMBER
IDENTIFICATION
SIGNIFICANCE
IDR BIT
NUMBER
IDENTIFICATION
SIGNIFICANCE
31
VERSION3
27
PARTNUMBER15
11
MANUFACTURER10
30
VERSION2
26
PARTNUMBER14
10
MANUFACTURER09
29
VERSION1
25
PARTNUMBER13
9
MANUFACTURER08
28
VERSION0
24
PARTNUMBER12
8
MANUFACTURER07
––
23
PARTNUMBER11
7
MANUFACTURER06
––
22
PARTNUMBER10
6
MANUFACTURER05
––
21
PARTNUMBER09
5
MANUFACTURER04
––
20
PARTNUMBER08
4
MANUFACTURER03
––
19
PARTNUMBER07
3
MANUFACTURER02
––
18
PARTNUMBER06
2
MANUFACTURER01
––
17
PARTNUMBER05
1
MANUFACTURER00
––
16
PARTNUMBER04
0
LOGIC1
––
15
PARTNUMBER03
––
14
PARTNUMBER02
––
13
PARTNUMBER01
––
12
PARTNUMBER00
––
Note that for TI products, bits 11–0 of the device-identification register always contain the binary value 000000101111
(02F, hex).
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