Product overview
Description
The ST2149 is a 4-bit dual supply level translator which provides the level shifting capability to allow data transfer in a multi-voltage system. Externally applied voltages, VCCand VL, set the logic levels on either side of the device. Its architecture allows bi-directional level translation without a control pin.
The ST2149 accepts VLfrom 1.65 to 3.6 V and VCCfrom 1.65 to 5.5 V, making it ideal for data transfer between low-voltage ASICs/PLD and higher voltage systems. This device has a tri-state output mode which can be used to disable all I/Os.
The ST2149 supports power-down mode when VCCis grounded/floating or when the device is disabled via the OE pin.
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All features
- 42 MHz: 84 Mbps (max.) data rate at VL= 1.8 V, VCC= 3.3 V
- Bi-directional level translation without direction control pin
- Wide voltage range (VCC≥ VL):
- VLranges from 1.65 to 3.6 V
- VCCranges from VLto 5.5 V
- Power-down mode feature - when VCCsupply is off, all I/Os are in high impedance
- Totem pole driving
- 5.5 V tolerant enable pin
- ESD performance on all pins: ±2 kV HBM
- Small package and footprint QFN16 (2.6 x 1.8 mm) package
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STMicroelectronics - ST2149
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