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Key Specifications
Part Number Description Status VCCA(Min)(V) VCCA(Max)(V) VCCB(Min)(V) VCCB(Max)(V) Max Data Rate(Mbps) No. of Bits Operating Temperature Range(℃) Pin/Package EV Kit Available?
UM3304QA 4-Bit Bidirectional Voltage-Level Translator with Auto Direction Sensing and ±4kV ESD Protection ACTIVE 1.2 3.6 1.65 5.5 100 4 -40 to 85 12/QFN 1.7×2.0 Y
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Product Description  

UM3304/UM3304Q/UM3304QS/UM3304QT/UM3304QA is quad channel level translator with auto direction sensing and ±4kV ESD protection. This 4-channel non-inverting translator uses two separate configurable power-supply rails. The A port is designed to track VCCA. VCCA accepts any supply voltage from 1.2V to 3.6V. The B port is designed to track VCCB. VCCB accepts any supply voltage from 1.65V to 5.5V. This allows for universal low-voltage bidirectional translation between any of the 1.2V, 1.5V, 1.8V, 2.5V, 3.3V, and 5V voltage nodes. Both I/O ports are auto-sensing; thus, no direction pin is required, making it ideal for data transfer between low-voltage ASICs/PLDs and higher voltage systems.
The UM3304/UM3304Q/UM3304QS/UM3304QT/UM3304QA operates at a guaranteed data rate of 20Mbps over the entire specified operating voltage range. Within specific voltage domains, higher data rates are up to 100Mbps.
When the output-enable (OE) input is low, all outputs are placed in the high-impedance state. The UM3304/UM3304Q/UM3304QS/UM3304QT/UM3304QA is designed so that the OE input circuit is designed to track VCCA.
To ensure the high-impedance state during power up or power down, OE should be tied to GND through a pull down resistor; the minimum value of the resistor is determined by the current-sourcing capability of the driver.
The UM3304 is a quad level translator available in 1.90mm×1.40mm CSP12 bump package, the UM3304Q/UM3304QS is packaged in a 3.50mm×3.50mm QFN14 package, the UM3304QT is packaged in a 2.60mm×1.80mm QFN16 package and the UM3304QA is packageed in a 1.70mm×2.00mm QFN12 package.
- 1.2V to 3.6V on A Port and 1.65V to 5.5V on B Port (VCCA≤VCCB)
- VCC Isolation Feature – If Either VCC Input is at GND, All Outputs are in the High-Impedance State
- OE Input Circuit Referenced to VCCA
- Low Power Consumption
- Latch-Up Performance Exceeds 100mA
- ±4kV ESD Protection on B Ports
Typical Application Circuit

- Low-Voltage ASIC Level Translation
- Cell-Phone Cradles
- Portable POS Systems
- Portable Communication Devices
- Low-Cost Serial Interfaces
- Cell-Phones
- Telecommunications Equipment
Pin Configurations   

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Ordering Information

Part Number
Packaging Type
Marking Code
Shipping Qty
QFN12 1.7×2.0
Tape & Reel

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