This 12-bit to 24-bit registered bus exchanger is designed for 1.65-V to 3.6-V V_CC operation.

The SN74ALVCH162268 is used for applications in which data must be transferred from a narrow high-speed bus to a wide, lower-frequency bus.

The device provides synchronous data exchange between the two ports. Data is stored in the internal registers on the low-to-high transition of the clock (CLK) input when the appropriate clock-enable (CLKEN)\ inputs are low. The select (SEL)\ line is synchronous with CLK and selects 1B or 2B input data for the A outputs.

For data transfer in the A-to-B direction, a two-stage pipeline is provided in the A-to-1B path, with a single storage register in the A-to-2B path. Proper control of these inputs allows two sequential 12-bit words to be presented synchronously as a 24-bit word on the B port. Data flow is controlled by the active-low output enables (OEA\, OEB\). These control terminals are registered, so bus direction changes are synchronous with CLK.

The B outputs, which are designed to sink up to 12 mA, include equivalent 26- resistors to reduce overshoot and undershoot.

To ensure the high-impedance state during power up or power down, a clock pulse should be applied as soon as possible and OE\ should be tied to V_CC through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver. Due to OE\ being routed through a register, the active state of the outputs cannot be determined prior to the arrival of the first clock pulse.

Active bus-hold circuitry holds unused or undriven inputs at a valid logic state. Use of pullup or pulldown resistors with the bus-hold circuitry is not recommended.

• Member of the Texas Instruments Widebus Family
• Operates From 1.65 V to 3.6 V VCC
• Max tpd of 4.8 ns at 3.3 V VCC
• ±24 mA Output Drive at 3.3 V VCC
• B-Port Outputs Have Equivalent 26- Series Resistors, So No External Resistors Are Required
• 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)

Widebus is a trademark of Texas Instruments.

• IOL (Max) (mA)
• 24
• IOH (Max) (mA)
• -32
• Technology Family
• ALVC
• Rating
• Catalog
• Operating temperature range (C)
• -40 to 85

SN74ALVCH162268的完整型号有：SN74ALVCH162268DL、SN74ALVCH162268GR，以下是这些产品的关键参数及官网采购报价：

SN74ALVCH162268DL，工作温度：-40 to 85，封装：SSOP (DL)-56，包装数量MPQ：20个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：NIPDAU，TI官网SN74ALVCH162268DL的批量USD价格：0.925（1000+）

SN74ALVCH162268GR，工作温度：-40 to 85，封装：TSSOP (DGG)-56，包装数量MPQ：2000个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：NIPDAU，TI官网SN74ALVCH162268GR的批量USD价格：0.74（1000+）