参数资料
型号: SN74ABT8952DWRE4
厂商: Texas Instruments
文件页数: 7/31页
文件大小: 0K
描述: IC SCAN TESST DEVICE 28-SOIC
标准包装: 1,000
系列: 74ABT
逻辑类型: 扫描测试设备,带寄存总线收发器
电源电压: 4.5 V ~ 5.5 V
位数: 8
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 28-SOIC(0.295",7.50mm 宽)
供应商设备封装: 28-SOIC
包装: 带卷 (TR)
SN54ABT8952, SN74ABT8952
SCAN TEST DEVICES WITH
OCTAL REGISTERED BUS TRANSCEIVERS
SCBS121D – AUGUST 1992 – REVISED JULY 1996
15
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
parallel-signature analysis (PSA)
Data appearing at the selected device input pins is compressed into a 16-bit parallel signature in the
shift-register elements of the selected 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. Data in the shadow
latches of the selected output BSCs remains constant and is applied to the device outputs. Figures 6 and 7
illustrate the 16-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.
=
MASKX
A8-I
B8-O
A7-I
A6-I
A5-I
A4-I
A3-I
A2-I
A1-I
B7-O
B6-O
B5-O
B4-O
B3-O
B2-O
B1-O
Figure 6. 16-Bit PSA Configuration (OEAB = 0, OEBA = 1)
=
MASKX
B8-I
A8-O
B7-I
B6-I
B5-I
B4-I
B3-I
B2-I
B1-I
A7-O
A6-O
A5-O
A4-O
A3-O
A2-O
A1-O
Figure 7. 16-Bit PSA Configuration (OEAB = 1, OEBA = 0)
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SN74ABT8996PW 功能描述:特定功能逻辑 10-Bit Add Scan Port /TAP Transceiver RoHS:否 制造商:Texas Instruments 产品: 系列:SN74ABTH18502A 工作电源电压:5 V 封装 / 箱体:LQFP-64 封装:Tube
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