ST2149 datasheet(1/23 Pages) STMICROELECTRONICS

Part #	ST2149

Description	4-bit dual supply level translator without direction control pin

PDF	23 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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1 / 23 page

This is information on a product in full production.

June 2012

Doc ID 15949 Rev 2

1/23

1

ST2149

4-bit dual supply level translator without direction control pin

Datasheet

−production data

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.

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

Packaging

Root part

number 1QTR

QFN16

(2.6 x 1.8 mm)

Tape and reel

(3000

parts per reel)

QFN16

(2.6 x 1.8 mm)

www.st.com

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