ST2149QTR STMicroelectronics, ST2149QTR Datasheet - Page 5

• Manufacturer Part Number: ST2149QTR
• Description: IC LEVEL TRANSLATOR 4BIT 16QFN
• Manufacturer: STMicroelectronics

Specifications of ST2149QTR

• Logic Function: Translator, Bidirectional
• Number Of Bits: 4
• Input Type: Logic
• Output Type: Logic
• Data Rate: 86Mbps
• Number Of Channels: 4
• Number Of Outputs/channel: 1
• Differential - Input:output: No/No
• Propagation Delay (max): 3.6ns
• Voltage - Supply: 1.65 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 16-QFN
• Supply Voltage: 1.65 V ~ 3.6 V
• Package Type: QFN
• Operating Supply Voltage (max): 3.6/5.5V
• Mounting: Surface Mount
• Operating Temperature (min): -40C
• Operating Temperature (max): 85C
• Operating Temperature Classification: Industrial
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-10151-2

ST2149
3
3.1
3.2
3.3
3.4
Supplementary notes
Driver requirement
For proper operation, the driver from each side of the device must have capability to source
and sink a minimum of 1 mA current. The device architecture requires the driver to
source/sink maximum current of (V
Load driving capability
To support the architecture that allows level translation without direction pin, the one-shot
transistor is turned ON only during state transition at the output side. After the one-shot
transistor is turned OFF, only the 4kΩ resistor will maintain the state. So, resistive load or
pull-up resistor less than 50kΩ is not recommended for proper operation.
Power off feature
In some application where it might be required to turn off one of the power supplies
powering up the level translator. The device will be automatically disabled when V
is turned OFF, even if the OE pin is set to HIGH (enabled). In this mode, all I/Os are in high
impedance state.
Truth table
Table 3.
1. High level V
2. High level V
3. Z = High impedance.
Enable
Truth table
L
CC
H
H
OE
power supply referred.
L
(1)
(1)
power supply referred.
Doc ID 15949 Rev 1
CC
/4) mA to/from the weak 4 kΩ output buffer.
I/O
H
Z
L
VCC
(3)
(2)
Bidirectional Input/Output
Supplementary notes
I/O
H
Z
L
(3)
(1)
VL
CC
supply
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