- 您现在的位置：买卖IC网 > PDF目录98127 > SN74LVTH182514DGG (TEXAS INSTRUMENTS INC) LVT SERIES, 20-BIT BOUNDARY SCAN REG TRANSCEIVER, TRUE OUTPUT, PDSO64 PDF资料下载
参数资料
| 型号： | SN74LVTH182514DGG |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 总线收发器 |
| 英文描述： | LVT SERIES, 20-BIT BOUNDARY SCAN REG TRANSCEIVER, TRUE OUTPUT, PDSO64 |
| 封装： | PLASTIC, TSSOP-64 |
| 文件页数： | 12/34页 |
| 文件大小： | 548K |
| 代理商： | SN74LVTH182514DGG |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页当前第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页
SN54LVTH18514, SN54LVTH182514, SN74LVTH18514, SN74LVTH182514
3.3-V ABT SCAN TEST DEVICES
WITH 20-BIT UNIVERSAL BUS TRANSCEIVERS
SCBS670C – AUGUST 1996 – REVISED MARCH 1998
2
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
description (continued)
In the normal mode, these devices are 20-bit universal bus transceivers that combine D-type latches and D-type
flip-flops to allow data flow in transparent, latched, or clocked modes. The test circuitry can be activated by the
TAP to take snapshot samples of the data appearing at the device pins or to perform a self-test on the
boundary-test cells. Activating the TAP in the normal mode does not affect the functional operation of the
SCOPE universal bus transceivers.
Data flow in each direction is controlled by output-enable (OEAB and OEBA), latch-enable (LEAB and LEBA),
clock-enable (CLKENAB and CLKENBA), and clock (CLKAB and CLKBA) inputs. For A-to-B data flow, the
device operates in the transparent mode when LEAB is high. When LEAB is low, the A data is latched while
CLKENAB is high and/or CLKAB is held at a static low or high logic level. Otherwise, if LEAB is low and
CLKENAB is low, A data is stored on a low-to-high transition of CLKAB. When OEAB is low, the B outputs are
active. When OEAB is high, the B outputs are in the high-impedance state. B-to-A data flow is similar to A-to-B
data flow, but uses the OEBA, LEBA, CLKENBA, and CLKBA inputs.
In the test mode, the normal operation of the SCOPE universal bus transceivers is inhibited, and the test circuitry
is enabled to observe and control the I/O boundary of the device. When enabled, the test circuitry performs
boundary-scan test operations according to the protocol described in IEEE Std 1149.1-1990.
Four dedicated test pins are used to observe and control the operation of the test circuitry: test data input (TDI),
test data output (TDO), test mode select (TMS), and test clock (TCK). Additionally, the test circuitry performs
other testing functions, such as parallel-signature analysis (PSA) on data inputs and pseudo-random pattern
generation (PRPG) from data outputs. All testing and scan operations are synchronized to the TAP interface.
Active bus-hold circuitry is provided to hold unused or floating data inputs at a valid logic level.
The B-port outputs of ’LVTH182514, which are designed to source or sink up to 12 mA, include equivalent 25-
series resistors to reduce overshoot and undershoot.
The SN54LVTH18514 and SN54LVTH182514 are characterized for operation over the full military temperature
range of –55
°C to 125°C. The SN74LVTH18514 and SN74LVTH182514 are characterized for operation from
–40
°C to 85°C.
FUNCTION TABLE
(normal mode, each register)
INPUTS
OUTPUT
OEAB
LEAB
CLKENAB
CLKAB
A
B
L
X
B0
L
LL
↑
LL
L
LL
↑
HH
L
LH
X
B0
L
HX
X
L
HX
X
H
X
Z
A-to-B data flow is shown. B-to-A data flow is similar, but uses
OEBA, LEBA, CLKENBA, and CLKBA.
Output level before the indicated steady-state input conditions were
established
相关PDF资料 |
PDF描述 |
|---|---|
| SN74LVTH18514DGG | LVT SERIES, 20-BIT BOUNDARY SCAN REG TRANSCEIVER, TRUE OUTPUT, PDSO64 |
| SN74LVTH18640DL | LVT SERIES, DUAL 9-BIT BOUNDARY SCAN TRANSCEIVER, INVERTED OUTPUT, PDSO56 |
| SN74LVTH18640DGGR | LVT SERIES, DUAL 9-BIT BOUNDARY SCAN TRANSCEIVER, INVERTED OUTPUT, PDSO56 |
| SN74LVTH2245DBRE4 | LVT SERIES, 8-BIT TRANSCEIVER, TRUE OUTPUT, PDSO20 |
| SN74LVTH2245DBR | LVT SERIES, 8-BIT TRANSCEIVER, TRUE OUTPUT, PDSO20 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| SN74LVTH182646APM | 功能描述:特定功能逻辑 18bit ABT 3.3V 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 |
| SN74LVTH182652APM | 功能描述:特定功能逻辑 10-Bit Bus Interface F-F W/3-State Otpt 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 |
| SN74LVTH18502APM | 功能描述:特定功能逻辑 3.3-V ABT w/18-Bit Univ Bus 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 |
| SN74LVTH18502APMG4 | 功能描述:特定功能逻辑 3.3-V ABT w/18-Bit Univ Bus 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 |
| SN74LVTH18502APMR | 功能描述:特定功能逻辑 10-Bit Bus/MOS Mem Drv 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 |
发布紧急采购，3分钟左右您将得到回复。