The UM3608 is octal bus transceivers that utilize deep micron CMOS Technology are intended for bus oriented application. This 8-bit non-inverting bus transceiver uses two separate configurable power-supply rails to implement universal low voltage bidirectional translation between any of the 1.8V,2.5V,3.3V and 5.5V voltage nodes. The UM3608 is optimized to operate with VCCA and VCCB set at 1.65V to 5.5V. The A port is designed to track VCCA. VCCA accepts any supply voltage from 1.65V to 5.5V. The B port is designed to track VCCB. VCCB accepts any supply voltage from 1.65V to 5.5 V.

The UM3608 is designed for asynchronous communication between two data buses. The logic levels of the direction-control (DIR) input and the output-enable (OE) input activate either the B-port outputs or the A-port outputs or place both output ports into the high-impedance mode. The device transmits data from the A bus to the B bus when the B-port outputs are activated, and from the B bus to the A bus when the A-port outputs are activated. The input circuitry on both A and B ports must have a logic HIGH or LOW level applied to prevent excess ICC and ICCZ.

UM3608 is fully specified for partial power down applications using Ioff. The Ioff circuitry disables the outputs, preventing damaging the current back flow through the device when it is powered down. The VCC isolation feature ensures that if either VCC Input is at GND, all outputs are in the high impedance state. To ensure the high impedance state during power up or power down. OE should be tied to VCC through a pull up resistor. The UM3608 is designed so that the control pins (DIR and OE) are supplied by VCCA.

- Control Inputs VIH/VIL Levels Are Referenced to VCCA Voltage

- VCC Isolation Feature – If Either VCC Input Is at GND, All Are in the High-Impedance State

- Fully Configurable Dual-Rail Design Allows Each Port to Operate Over the Full 1.65V to 5.5V Power-Supply Range

- Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II

- ESD Protection Exceeds JESD22

-- 4000V Human-Body Model (A114-A)

-- 100V Machine Model (A115-A)

-- 1000V Charged-Device Model (C101)

- Available in SSOP24, TSSOP24 and QFN24 3.5×5.5 Packages

- Max Data Rates:

-- 150 Mbps (VCCA < 3.3 V or VCCB < 3.3 V)

-- 220 Mbps (VCCA ≥ 3.3 V and VCCB ≥ 3.3 V)

- Personal Electronic

- Industrial

- Enterprise

- Telecom