SN74ABTH182652A

アクティブ

18 ビット・トランシーバ / レジスタ搭載、スキャン・テスト・デバイス

製品詳細

Supply voltage (min) (V) 4.5 Supply voltage (max) (V) 5.5 Number of channels 18 IOL (max) (mA) 64 IOH (max) (mA) -32 Input type TTL-Compatible CMOS Output type 3-State Features Bus-hold, Damping resistors, Partial power down (Ioff), Very high speed (tpd 5-10ns) Technology family ABT Rating Catalog Operating temperature range (°C) -40 to 85
Supply voltage (min) (V) 4.5 Supply voltage (max) (V) 5.5 Number of channels 18 IOL (max) (mA) 64 IOH (max) (mA) -32 Input type TTL-Compatible CMOS Output type 3-State Features Bus-hold, Damping resistors, Partial power down (Ioff), Very high speed (tpd 5-10ns) Technology family ABT Rating Catalog Operating temperature range (°C) -40 to 85
LQFP (PM) 64 144 mm² 12 x 12
  • Members of the Texas Instruments SCOPETM Family of Testability Products
  • Members of the Texas Instruments WidebusTM Family
  • Compatible With the IEEE Standard 1149.1-1990 (JTAG) Test Access Port and Boundary-Scan Architecture
  • Include D-Type Flip-Flops and Control Circuitry to Provide Multiplexed Transmission of Stored and Real-Time Data
  • Bus Hold on Data Inputs Eliminates the Need for External Pullup Resistors
  • B-Port Outputs of 'ABTH182652A Devices Have Equivalent 25- Series Resistors, So No External Resistors Are Required
  • State-of-the-Art EPIC-IIBTM BiCMOS Design
  • One Boundary-Scan Cell Per I/O Architecture Improves Scan Efficiency
  • SCOPETM Instruction Set
    • IEEE Standard 1149.1-1990 Required Instructions and Optional CLAMP and HIGHZ
    • Parallel-Signature Analysis at Inputs
    • Pseudo-Random Pattern Generation From Outputs
    • Sample Inputs/Toggle Outputs
    • Binary Count From Outputs
    • Device Identification
    • Even-Parity Opcodes
  • Packaged in 64-Pin Plastic Thin Quad Flat (PM) Packages Using 0.5-mm Center-to-Center Spacings and 68-Pin Ceramic Quad Flat (HV) Packages Using 25-mil Center-to-Center Spacings

    SCOPE, Widebus, and EPIC-IIB are trademarks of Texas Instruments Incorporated.

     

     

  • Members of the Texas Instruments SCOPETM Family of Testability Products
  • Members of the Texas Instruments WidebusTM Family
  • Compatible With the IEEE Standard 1149.1-1990 (JTAG) Test Access Port and Boundary-Scan Architecture
  • Include D-Type Flip-Flops and Control Circuitry to Provide Multiplexed Transmission of Stored and Real-Time Data
  • Bus Hold on Data Inputs Eliminates the Need for External Pullup Resistors
  • B-Port Outputs of 'ABTH182652A Devices Have Equivalent 25- Series Resistors, So No External Resistors Are Required
  • State-of-the-Art EPIC-IIBTM BiCMOS Design
  • One Boundary-Scan Cell Per I/O Architecture Improves Scan Efficiency
  • SCOPETM Instruction Set
    • IEEE Standard 1149.1-1990 Required Instructions and Optional CLAMP and HIGHZ
    • Parallel-Signature Analysis at Inputs
    • Pseudo-Random Pattern Generation From Outputs
    • Sample Inputs/Toggle Outputs
    • Binary Count From Outputs
    • Device Identification
    • Even-Parity Opcodes
  • Packaged in 64-Pin Plastic Thin Quad Flat (PM) Packages Using 0.5-mm Center-to-Center Spacings and 68-Pin Ceramic Quad Flat (HV) Packages Using 25-mil Center-to-Center Spacings

    SCOPE, Widebus, and EPIC-IIB are trademarks of Texas Instruments Incorporated.

     

     

The 'ABTH18652A and 'ABTH182652A scan test devices with 18-bit bus transceivers and registers are members of the Texas Instruments SCOPETM testability integrated-circuit family. This family of devices supports IEEE Standard 1149.1-1990 boundary scan to facilitate testing of complex circuit-board assemblies. Scan access to the test circuitry is accomplished via the 4-wire test access port (TAP) interface.

In the normal mode, these devices are 18-bit bus transceivers and registers that allow for multiplexed transmission of data directly from the input bus or from the internal registers. They can be used either as two 9-bit transceivers or one 18-bit transceiver. 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 SCOPETM bus transceivers and registers.

Data flow in each direction is controlled by clock (CLKAB and CLKBA), select (SAB and SBA), and output-enable (OEAB and ) inputs. For A-to-B data flow, data on the A bus is clocked into the associated registers on the low-to-high transition of CLKAB. When SAB is low, real-time A data is selected for presentation to the B bus (transparent mode). When SAB is high, stored A data is selected for presentation to the B bus (registered mode). When OEAB is high, the B outputs are active. When OEAB is low, the B outputs are in the high-impedance state. Control for B-to-A data flow is similar to that for A-to-B data flow, but uses CLKBA, SBA, and inputs. Since the input is active-low, the A outputs are active when is low and are in the high-impedance state when is high. Figure 1 illustrates the four fundamental bus-management functions that are performed with the 'ABTH18652A and 'ABTH182652A.

 

In the test mode, the normal operation of the SCOPETM bus transceivers and registers 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 Standard 1149.1-1990.

Four dedicated test pins 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.

Improved scan efficiency is accomplished through the adoption of a one boundary-scan cell (BSC) per I/O pin architecture. This architecture is implemented in such a way as to capture the most pertinent test data. A PSA/COUNT instruction is also included to ease the testing of memories and other circuits where a binary count addressing scheme is useful.

Active bus-hold circuitry holds unused or floating data inputs at a valid logic level.

The B-port outputs of 'ABTH182652A, which are designed to source or sink up to 12 mA, include 25- series resistors to reduce overshoot and undershoot.

The SN54ABTH18652A and SN54ABTH182652A are characterized for operation over the full military temperature range of -55°C to 125°C. The SN74ABTH18652A and SN74ABTH182652A are characterized for operation from -40°C to 85°C.

 

 

 

The 'ABTH18652A and 'ABTH182652A scan test devices with 18-bit bus transceivers and registers are members of the Texas Instruments SCOPETM testability integrated-circuit family. This family of devices supports IEEE Standard 1149.1-1990 boundary scan to facilitate testing of complex circuit-board assemblies. Scan access to the test circuitry is accomplished via the 4-wire test access port (TAP) interface.

In the normal mode, these devices are 18-bit bus transceivers and registers that allow for multiplexed transmission of data directly from the input bus or from the internal registers. They can be used either as two 9-bit transceivers or one 18-bit transceiver. 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 SCOPETM bus transceivers and registers.

Data flow in each direction is controlled by clock (CLKAB and CLKBA), select (SAB and SBA), and output-enable (OEAB and ) inputs. For A-to-B data flow, data on the A bus is clocked into the associated registers on the low-to-high transition of CLKAB. When SAB is low, real-time A data is selected for presentation to the B bus (transparent mode). When SAB is high, stored A data is selected for presentation to the B bus (registered mode). When OEAB is high, the B outputs are active. When OEAB is low, the B outputs are in the high-impedance state. Control for B-to-A data flow is similar to that for A-to-B data flow, but uses CLKBA, SBA, and inputs. Since the input is active-low, the A outputs are active when is low and are in the high-impedance state when is high. Figure 1 illustrates the four fundamental bus-management functions that are performed with the 'ABTH18652A and 'ABTH182652A.

 

In the test mode, the normal operation of the SCOPETM bus transceivers and registers 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 Standard 1149.1-1990.

Four dedicated test pins 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.

Improved scan efficiency is accomplished through the adoption of a one boundary-scan cell (BSC) per I/O pin architecture. This architecture is implemented in such a way as to capture the most pertinent test data. A PSA/COUNT instruction is also included to ease the testing of memories and other circuits where a binary count addressing scheme is useful.

Active bus-hold circuitry holds unused or floating data inputs at a valid logic level.

The B-port outputs of 'ABTH182652A, which are designed to source or sink up to 12 mA, include 25- series resistors to reduce overshoot and undershoot.

The SN54ABTH18652A and SN54ABTH182652A are characterized for operation over the full military temperature range of -55°C to 125°C. The SN74ABTH18652A and SN74ABTH182652A are characterized for operation from -40°C to 85°C.

 

 

 

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種類 タイトル 最新の英語版をダウンロード 日付
* データシート Scan Test Devices With 18-Bit Bus Transceivers And Registers データシート (Rev. D) 1996年 7月 1日
アプリケーション・ノート Implications of Slow or Floating CMOS Inputs (Rev. E) 2021年 7月 26日
アプリケーション・ノート An Overview of Bus-Hold Circuit and the Applications (Rev. B) 2018年 9月 17日
セレクション・ガイド Logic Guide (Rev. AB) 2017年 6月 12日
アプリケーション・ノート Understanding and Interpreting Standard-Logic Data Sheets (Rev. C) 2015年 12月 2日
セレクション・ガイド ロジック・ガイド (Rev. AA 翻訳版) 最新英語版 (Rev.AB) 2014年 11月 6日
ユーザー・ガイド LOGIC Pocket Data Book (Rev. B) 2007年 1月 16日
EVM ユーザー ガイド (英語) LASP Demo Board User's Guide 2005年 11月 1日
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セレクション・ガイド Advanced Bus Interface Logic Selection Guide 2001年 1月 9日
アプリケーション・ノート Bus-Interface Devices With Output-Damping Resistors Or Reduced-Drive Outputs (Rev. A) 1997年 8月 1日
アプリケーション・ノート Advanced BiCMOS Technology (ABT) Logic Characterization Information (Rev. B) 1997年 6月 1日
アプリケーション・ノート Designing With Logic (Rev. C) 1997年 6月 1日
アプリケーション・ノート Advanced BiCMOS Technology (ABT) Logic Enables Optimal System Design (Rev. A) 1997年 3月 1日
アプリケーション・ノート Family of Curves Demonstrating Output Skews for Advanced BiCMOS Devices (Rev. A) 1996年 12月 1日
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設計および開発

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シミュレーション・モデル

BSDL Model of SN74ABTH182652A

SCTM024.ZIP (3 KB) - BSDL Model
シミュレーション・モデル

SN74ABTH182652A IBIS Model (Rev. A)

SCBM040A.ZIP (24 KB) - IBIS Model
パッケージ ピン数 CAD シンボル、フットプリント、および 3D モデル
LQFP (PM) 64 Ultra Librarian

購入と品質

記載されている情報:
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  • リード端子の仕上げ / ボールの原材料
  • MSL 定格 / ピーク リフロー
  • MTBF/FIT 推定値
  • 使用原材料
  • 認定試験結果
  • 継続的な信頼性モニタ試験結果
記載されている情報:
  • ファブの拠点
  • 組み立てを実施した拠点

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