參數(shù)資料
型號: SN74LVTH18514DGG
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, PDSO64
封裝: PLASTIC, TSSOP-64
文件頁數(shù): 3/34頁
文件大?。?/td> 548K
代理商: SN74LVTH18514DGG
SN54LVTH18514, SN54LVTH182514, SN74LVTH18514, SN74LVTH182514
3.3-V ABT SCAN TEST DEVICES
WITH 20-BIT UNIVERSAL BUS TRANSCEIVERS
SCBS670C – AUGUST 1996 – REVISED MARCH 1998
11
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 ’LVTH18514, the binary value 00000000000000111101000000101111 (0003D02F, hex) is captured
(during Capture-DR state) in the IDR to identify this device as TI SN54/74LVTH18514.
For the ’LVTH182514, the binary value 00000000000000111110000000101111 (0003E02F, hex) is captured
(during Capture-DR state) in the IDR to identify this device as TI SN54/74LVTH182514.
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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