Union Semiconductor UM3204UE

The UM3204 is quad channel ESD-protected level translator provide the level shifting necessary to allow data transfer in a multi-voltage system. Externally applied voltages, V_CCB and V_CCA, set the logic levels on either side of the device. A low-voltage logic signal present on the V_CCA side of the device appears as a high-voltage logic signal on the V_CCB side of the device, and vice-versa. The UM3204 bidirectional level translator utilizes a transmission-gate based design to allow data translation in either direction (V_CCA ↔ V_CCB) on any single data line. The UM3204 accepts V_CCA from +1.65 V to +3.6 V and V_CCB from +2.3 V to +5.5 V, making it ideal for data transfer between low-voltage ASICs / PLDs and higher voltage systems. The UM3204 enters a three-state output mode to reduce supply current when output enable (OE) is low. The UM3204 is designed so that the OE input circuit is supplied by V_CCA. ±5 kV ESD protection on the V_CCB side for greater protection in applications that route signals externally. The UM3204 is a quad level translator available in CSP12 1.9 × 1.4, QFN14 3.5 × 3.5, TSSOP14 and QFN12 1.7 × 2.0 packages.

• SPI, MICROWIRE, and I²C Level Translation
• Low-Voltage ASIC Level Translation
• Smart Card Readers Cell-Phone Cradles
• Portable POS Systems
• Portable Communication Devices
• Low-Cost Serial Interfaces Cell-Phones GPS Telecommunications Equipment
• Max Data Rates: 24Mbps(Push Pull), 2Mbps(Open Drain)
• Bidirectional Level Translation
• 1.65V to 3.6V on A Port and 2.3V to 5.5V on B Port(VCCA≤VCCB)
• ±5kV ESD Protection on B Port
• No Power-Supply Sequencing Required VCCA or VCCB Can Be Ramped First
• CSP12, QFN14, TSSOP14 and QFN12 Packages

• The UM3204 can be used in level-translation applications for interfacing devices or systems operating at different interface voltages with one another.
• The UM3204 is ideal for use in application where an open-drain driver is connected to the data I/Os.
• The UM3204 can also be used in applications where a push-pull driver is connected to the data I/Os, but the UM3304 might be a better option for such push-pull applications.