HD74ALVCH162270 - Hitachi Semiconductor

HD74ALVCH162270 12-bit to 24-bit Registered Bus Exchanger with 3-state Outputs

The HD74ALVCH162270 is used in applications where 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 CLKEN inputs are low. The select (SEL) .

Features

• VCC = 2.3 V to 3.6 V
• Typical VOL ground bounce < 0.8 V (@VCC = 3.3 V, Ta = 25°C)
• Typical VOH undershoot > 2.0 V (@VCC = 3.3 V, Ta = 25°C)
• High output current ±12 mA (@VCC = 3.0 V)
• Bus hold on data inputs eliminates the need for external pullup / pulldown resistors
• All outputs have equivalent 26 Ω series resistors, so no external resistors are required. HD74ALVCH162270 Function Table Inputs CLK ↑ ↑ ↑ ↑ OEA H H L L OEB H L H L Outputs A Z Z Active Active 1B, 2B Z Active Z Active Output enable Inputs CLKENA1 X X L L H H H CLKENA2 H H L L L L H CLK ↑ ↑ ↑ ↑ ↑ ↑ X A L H L H L H X Out.