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PDF ST2149 Data sheet ( Hoja de datos )
| Número de pieza | ST2149 | |
| Descripción | 4-bit dual supply level translator | |
| Fabricantes | STMicroelectronics | |
| Logotipo |  |
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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
1 page  
ST2149
1 Pin settings
1.1 Pin connection
Figure 1. Pin connection (top through view)
Pin settings
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Doc ID 15949 Rev 2
5/23
5 Page 
ST2149
5 Electrical characteristics
Electrical characteristics
Over recommended operating conditions unless otherwise noted. All typical values are at
TA = 25 °C.
Table 6. DC characteristics
Value
Symbol Parameter
VL
VCC
Test
conditions
TA = 25 °C
-40 to 85 °C Unit
Min. Typ. Max. Min. Max.
VIHL
VILL
VIHC
VILC
1.65
High-level
input voltage
(I/OVL)
1.8
2.5 1.65 to 5.5
3.0
3.6
Low-level
input voltage
(I/OVL)
1.65
1.8
2.5
3.0
3.6
1.65 to 5.5
1.65
1.8
High-level
input voltage
(I/OVCC)
1.65 to 3.6
2.5
3.0
3.6
4.3
5.5
Low-level
input voltage
(I/OVCC)
1.65 to 3.6
1.65
1.8
2.5
3.0
3.6
4.3
5.5
1.16 – – 1.16 –
1.26 – – 1.26 –
1.75 – – 1.75 – V
2.10 – – 2.10 –
2.52 – – 2.52 –
– – 0.50 – 0.50
– – 0.54 – 0.54
– – 0.75 – 0.75 V
– – 0.90 – 0.90
– – 1.08 – 1.08
1.16 – – 1.16 –
1.26 – – 1.26 –
1.75 – – 1.75 –
2.10 – – 2.10 – V
2.52 – – 2.52 –
3.01 – – 3.01 –
3.85 – – 3.85 –
– – 0.50 – 0.50
– – 0.54 – 0.54
– – 0.75 – 0.75
– – 0.90 – 0.90 V
– – 1.08 – 1.08
– – 1.29 – 1.29
– – 1.65 – 1.65
Doc ID 15949 Rev 2
11/23
11 Page | ||
| Páginas | Total 23 Páginas | |
| PDF Descargar | [ Datasheet ST2149.PDF ] | |
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