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PDF ST2349 Data sheet ( Hoja de datos )
| Número de pieza | ST2349 | |
| Descripción | 4-bit dual supply level translator | |
| Fabricantes | STMicroelectronics | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de ST2349 (archivo pdf) en la parte inferior de esta página. Total 23 Páginas | ||
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ST2349
4-bit dual supply level translator
without direction control pin
Features
■ 45 Mbps (max) data rate when driven by a
totem pole driver
■ 4 Mbps (max) data rate when driven by an
open drain pole driver
■ Bi-directional level translation without
direction control pin
■ Wide VL voltage range of 1.65 to 3.6 V
■ Wide VCC voltage range of 1.80 to 5.5 V
■ Power down mode feature – when either
supply is off, all I/Os are in high impedance
■ Low quiescent current (max 24 µA)
■ Able to be driven by totem pole and open drain
drivers
■ 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
■ I2C level translation
■ UART level translation
QFN16L
(2.6 x 1.8 mm)
Description
The ST2349 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. It utilizes
transmission gate-based design that allows bi-http://www.DataSheet4U.net/
directional level translation without a control pin.
The ST2349 accepts a VL from 1.65 to 3.6 V and
VCC from 1.80 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 ST2349 supports power down mode when
VCC is grounded/floating and the device is
disabled via the OE pin.
Table 1.
Device summary
Order code
ST2349QTR
Package
QFN16 (2.6 x 1.8 mm)
Packaging
Tape & reel (3000 parts per reel)
November 2007
Rev 3
1/23
www.st.com
23
datasheet pdf - http://www.DataSheet4U.net/
1 page  
ST2349
1 Pin settings
1.1 Pin connection
Figure 1. ST2349 pin connection (top through view)
Pin settings
16 15 14 13
I/OVL2
OE
I/OVL3
I/OVL4
1
2
3
4
12 I/OVCC2
11 GND
10 I/OVCC3
9 I/OVCC4
5678
1.2
Pin description
Table 2. ST2349 pin description
Pin number
Symbol
http://www.DataSheet4U.net/
1 I/OVL2
2 OE
3 I/OVL3
4 I/OVL4
5 NC
6 VL
7 VCC
8 NC
9 I/OVCC4
10 I/OVCC3
11 GND
12 I/OVCC2
13 I/OVCC1
14 VCC
15 VL
16 I/OVL1
CS00022
Name and function
Data input/output
Output enable
Data input/output
Data input/output
No connection
Supply voltage
Supply voltage
No connection
Data input/output
Data input/output
Ground
Data input/output
Data input/output
Supply voltage
Supply voltage
Data input/output
5/23
datasheet pdf - http://www.DataSheet4U.net/
5 Page 
ST2349
Electrical characteristics
5.1 AC characteristics (device driven by open drain driver)
Table 7.
Symbol
AC characteristics - test conditions: VL = 1.65 −1.8 V (load CL = 15 pF; Rup = 4.7 kΩ;
driver tr = tf ≤ 2 ns) over temperature range -40 °C to 85 °C
Parameter
VCC = 1.8 −2.5 V VCC = 2.7 −3.6 V
VCC = 4.3 −
5.5 V
Unit
Min Max Min Max Min Max
tRVCC Rise time I/OVCC
80 50 30 ns
tFVCC Fall time I/OVCC
3 3 3 ns
tRVL Rise time I/OVL
7 6 6 ns
tFVL
Fall time I/OVL
4 5 5 ns
tI/OVL-VCC
Propagation delay time
I/OVL-LH to I/OVCC-LH
I/OVL-HL to I/OVCC-HL
tPLH
tPHL
5
5
5 5 ns
5 5 ns
tI/OVCC-VL
Propagation delay time
I/OVCC-LH to I/OVL-LH
I/OVCC-HL to I/OVL-LH
tPLH
tPHL
5
5
5 5 ns
7 7 ns
tPZL tPZH Output enable and
tPLZ tPHZ disable time
En
Dis
10
40
10 10 ns
40 40 ns
DR Data rate(1)
1.6 2.5 4 MHz
1. The data rate is guaranteed based on the condition that the output I/O signal rise/fall time is less than 15% of the input I/O
signal period; the input I/O signal is at 50% duty cycle and the output I/O signal duty cycle deviation not less than 30%.
Table 8.
Symbol
http://www.DataSheet4U.net/
AC characteristics - test conditions: VL = 2.5 −2.7 V (load CL = 15 pF; Rup = 4.7 kΩ; driver
tr = tf ≤ 2 ns) over temperature range -40 °C to 85 °C
Parameter
VCC = 2.7 −3.6 V
Min Max
VCC = 4.3 − 5.5 V
Min Max
Unit
tRVCC
tFVCC
tRVL
tFVL
tI/OVL-VCC
tI/OVCC-VL
Rise time I/OVCC
Fall time I/OVCC
Rise time I/OVL
Fall time I/OVL
Propagation delay time
I/OVL-LH to I/OVCC-LH
I/OVL-HL to I/OVCC-HL
Propagation delay time
I/OVCC-LH to I/OVL-LH
I/OVCC-HL to I/OVL-LH
tPLH
tPHL
tPLH
tPHL
70 40 ns
3 3 ns
5 5 ns
3 3 ns
2 2 ns
3 3 ns
3 3 ns
4 4 ns
11/23
datasheet pdf - http://www.DataSheet4U.net/
11 Page | ||
| Páginas | Total 23 Páginas | |
| PDF Descargar | [ Datasheet ST2349.PDF ] | |
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