產品詳細資料

Supply voltage (min) (V) 1.65 Supply voltage (max) (V) 3.6 Number of channels 8 IOL (max) (mA) 24 IOH (max) (mA) -24 Input type LVTTL Output type LVTTL Features Balanced outputs, Bus-hold, Ultra high speed (tpd <5ns) Technology family ALVC Rating Catalog Operating temperature range (°C) -40 to 85
Supply voltage (min) (V) 1.65 Supply voltage (max) (V) 3.6 Number of channels 8 IOL (max) (mA) 24 IOH (max) (mA) -24 Input type LVTTL Output type LVTTL Features Balanced outputs, Bus-hold, Ultra high speed (tpd <5ns) Technology family ALVC Rating Catalog Operating temperature range (°C) -40 to 85
TSSOP (DGG) 48 101.25 mm² 12.5 x 8.1
  • Member of the Texas Instruments Widebus™ Family
  • Bus Hold on Data Inputs Eliminates the Need for External Pullup/Pulldown Resistors
  • Latch-Up Performance Exceeds 250 mA Per JESD 17
  • ESD Protection Exceeds JESD 22
    • 2000-V Human-Body Model (A114-A)
    • 200-V Machine Model (A115-A)
    • 1000-V Charged-Device Model (C101)

Widebus is a trademark of Texas Instruments.

  • Member of the Texas Instruments Widebus™ Family
  • Bus Hold on Data Inputs Eliminates the Need for External Pullup/Pulldown Resistors
  • Latch-Up Performance Exceeds 250 mA Per JESD 17
  • ESD Protection Exceeds JESD 22
    • 2000-V Human-Body Model (A114-A)
    • 200-V Machine Model (A115-A)
    • 1000-V Charged-Device Model (C101)

Widebus is a trademark of Texas Instruments.

This device contains four independent noninverting buffers and an 8-bit noninverting bus transceiver and D-type latch, designed for 1.65-V to 3.6-V VCC operation.

The SN74ALVCH16973 is particularly suitable for demultiplexing an address/data bus into a dedicated address bus and dedicated data bus. The device is used where there is asynchronous bidirectional communication between the A and B data bus, and the address signals are latched and buffered on the Q bus. The control-function implementation minimizes external timing requirements.

This device can be used as one 4-bit buffer, one 8-bit transceiver, and one 8-bit latch. It allows data transmission from the A bus to the B bus or from the B bus to the A bus, depending on the logic level at the direction-control (DIR) input. The transceiver output-enable (TOE)\ input can be used to disable the transceivers so that the A and B buses effectively are isolated.

When the latch-enable (LE) input is high, the Q outputs follow the data (A) inputs. When LE is taken low, the Q outputs are latched at the levels set up at the A inputs. The latch output-enable (LOE)\ input can be used to place the nine Q outputs in either a normal logic state (high or low logic level) or the high-impedance state. In the high-impedance state, the Q outputs neither drive nor load the bus lines significantly. LOE\ does not affect internal operations of the latch. Old data can be retained or new data can be entered while the Q outputs are in the high-impedance state.

To ensure the high-impedance state during power up or power down, LOE\ and TOE\ should be tied to VCC through pullup resistors; the minimum values of the resistors are determined by the current-sinking capability of the drivers.

The four independent noninverting buffers perform the Boolean function Y = D and are independent of the state of DIR, TOE\, LE, and LOE\.

The A and B I/Os, and D inputs have bus-hold circuitry. Active bus-hold circuitry holds unused or undriven data inputs at a valid logic state. Use of pullup or pulldown resistors with the bus-hold circuitry is not recommended.

This device contains four independent noninverting buffers and an 8-bit noninverting bus transceiver and D-type latch, designed for 1.65-V to 3.6-V VCC operation.

The SN74ALVCH16973 is particularly suitable for demultiplexing an address/data bus into a dedicated address bus and dedicated data bus. The device is used where there is asynchronous bidirectional communication between the A and B data bus, and the address signals are latched and buffered on the Q bus. The control-function implementation minimizes external timing requirements.

This device can be used as one 4-bit buffer, one 8-bit transceiver, and one 8-bit latch. It allows data transmission from the A bus to the B bus or from the B bus to the A bus, depending on the logic level at the direction-control (DIR) input. The transceiver output-enable (TOE)\ input can be used to disable the transceivers so that the A and B buses effectively are isolated.

When the latch-enable (LE) input is high, the Q outputs follow the data (A) inputs. When LE is taken low, the Q outputs are latched at the levels set up at the A inputs. The latch output-enable (LOE)\ input can be used to place the nine Q outputs in either a normal logic state (high or low logic level) or the high-impedance state. In the high-impedance state, the Q outputs neither drive nor load the bus lines significantly. LOE\ does not affect internal operations of the latch. Old data can be retained or new data can be entered while the Q outputs are in the high-impedance state.

To ensure the high-impedance state during power up or power down, LOE\ and TOE\ should be tied to VCC through pullup resistors; the minimum values of the resistors are determined by the current-sinking capability of the drivers.

The four independent noninverting buffers perform the Boolean function Y = D and are independent of the state of DIR, TOE\, LE, and LOE\.

The A and B I/Os, and D inputs have bus-hold circuitry. Active bus-hold circuitry holds unused or undriven data inputs at a valid logic state. Use of pullup or pulldown resistors with the bus-hold circuitry is not recommended.

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類型 標題 日期
* Data sheet SN74ALVCH16973 datasheet (Rev. B) 2004年 9月 16日
Application note An Overview of Bus-Hold Circuit and the Applications (Rev. B) 2018年 9月 17日
Selection guide Logic Guide (Rev. AB) 2017年 6月 12日
Application note Understanding and Interpreting Standard-Logic Data Sheets (Rev. C) 2015年 12月 2日
User guide LOGIC Pocket Data Book (Rev. B) 2007年 1月 16日
Application note Semiconductor Packing Material Electrostatic Discharge (ESD) Protection 2004年 7月 8日
Application note TI IBIS File Creation, Validation, and Distribution Processes 2002年 8月 29日
User guide ALVC Advanced Low-Voltage CMOS Including SSTL, HSTL, And ALB (Rev. B) 2002年 8月 1日
More literature Standard Linear & Logic for PCs, Servers & Motherboards 2002年 6月 13日
Application note 16-Bit Widebus Logic Families in 56-Ball, 0.65-mm Pitch Very Thin Fine-Pitch BGA (Rev. B) 2002年 5月 22日
Application note Benefits & Issues of Migrating 5-V and 3.3-V Logic to Lower-Voltage Supplies (Rev. A) 1999年 9月 8日
Application note TI SN74ALVC16835 Component Specification Analysis for PC100 1998年 8月 3日
Application note Logic Solutions for PC-100 SDRAM Registered DIMMs (Rev. A) 1998年 5月 13日
Application note Migration From 3.3-V To 2.5-V Power Supplies For Logic Devices 1997年 12月 1日
Application note Bus-Interface Devices With Output-Damping Resistors Or Reduced-Drive Outputs (Rev. A) 1997年 8月 1日
Application note CMOS Power Consumption and CPD Calculation (Rev. B) 1997年 6月 1日
Application note Input and Output Characteristics of Digital Integrated Circuits 1996年 10月 1日
Application note Live Insertion 1996年 10月 1日
Application note Understanding Advanced Bus-Interface Products Design Guide 1996年 5月 1日

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模擬型號

HSPICE Model of SN74ALVCH16973

SCEJ147.ZIP (56 KB) - HSpice Model
模擬型號

SN74ALVCH16973 IBIS Model (Rev. B)

SCEM335B.ZIP (160 KB) - IBIS Model
封裝 針腳 CAD 符號、佔位空間與 3D 模型
TSSOP (DGG) 48 Ultra Librarian

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