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ST2149

STMicroelectronics
Part Number ST2149
Manufacturer STMicroelectronics
Description 4-bit dual supply level translator
Published Mar 15, 2016
Detailed Description ST2149 4-bit dual supply level translator without direction control pin Features ■ 42 MHz: 84 Mbps (max.) data rate at...
Datasheet PDF File ST2149 PDF File

ST2149
ST2149

Overview
ST2149 4-bit dual supply level translator without direction control pin 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): – VL ranges from 1.
65 to 3.
6 V – VCC ranges from VL to 5.
5 V ■ Power-down mode feature - when VCC supply 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 Applications ■ Low-voltage system level translation ■ Mobile phones and other mobile devices 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, VCC and VL, set the logic levels on either side of the device.
Its architecture allows bi-directional level translation without a control pin.
Datasheet −production data QFN16 (2.
6 x 1.
8 mm) The ST2149 accepts VL from 1.
65 to 3.
6 V and VCC from 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 VCC is grounded/floating or when the device is disabled via the OE pin.
Table 1.
Device summary Order code Package Root part QFN16 number 1QTR (2.
6 x 1.
8 mm) Packaging Tape and reel (3000 parts per reel) June 2012 This is information on a product in full production.
Doc ID 15949 Rev 2 1/23 www.
st.
com 1 Contents Contents ST2149 1 Pin settings .
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5 1.
1 Pin connection .
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5 1.
2 Pin description .
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6 2 Logic diagram .
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