SN74ALVCH244PWR

The Texas Instruments SN74ALVCH244PWR is an octal buffer/line driver designed for 1.65-V to 3.6-V VCC operation. This device is organized as two 4-bit line drivers, each with separate output-enable (OE) inputs. When OE is low, data passes from the A inputs to the Y outputs. When OE is high, the outputs enter a high-impedance state.

Key electrical characteristics include a maximum propagation delay of 2.8 ns at 3.3V and an output drive capability of ±24mA at 3.3V. The SN74ALVCH244PWR incorporates active bus-hold circuitry on data inputs, which eliminates the need for external pull-up or pull-down resistors by holding unused inputs at a valid logic state. Latch-up performance exceeds 250 mA per JESD 17, and ESD protection exceeds JESD 22 standards for both the Human-Body Model (2000V) and Machine Model (200V).

This component is supplied in a 20-TSSOP (0.173", 4.40mm Width) surface-mount package. The operating temperature range is -40°C to 85°C (TA). To ensure the high-impedance state during power transitions, the OE input should be tied to VCC through a pull-up resistor, with the minimum value determined by the driver's current-sinking capability. Use of pull-up or pull-down resistors with the bus-hold circuitry is not recommended.