ST2149 Datasheet, PDF (1/23 Pages) STMicroelectronics – 4-bit dual supply level translator without direction control pin

ST2149
4-bit dual supply level translator without direction control pin
Features
■ 42 MHz: 84 Mbps (max.) data rate at
V_L = 1.8 V, V_CC = 3.3 V
■ Bi-directional level translation without direction
control pin
■ Wide voltage range (V_CC ≥ V_L):
– V_L ranges from 1.65 to 3.6 V
– V_CC ranges from V_L to 5.5 V
■ Power-down mode feature - when V_CC 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, V_CC and V_L, 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 V_L from 1.65 to 3.6 V and
V_CC 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
V_CC 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
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