ST2129QTR STMicroelectronics, ST2129QTR Datasheet - Page 5

• Manufacturer Part Number: ST2129QTR
• Description: IC LEVEL TRANSLATOR 2BIT 10QFN
• Manufacturer: STMicroelectronics

Specifications of ST2129QTR

• Logic Function: Translator, Bidirectional
• Number Of Bits: 2
• Input Type: Logic
• Output Type: Logic
• Data Rate: 86Mbps
• Number Of Channels: 2
• 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: 10-QFN
• Supply Voltage: 1.65 V ~ 3.6 V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-10150-2

ST2129
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 the capability to
source and sink a minimum of 1mA current. The device architecture requires the driver to
source/sink a 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 4 kΩ resistor maintains the state. So, resistive load or pull-up
resistor less than 50 kΩ is not recommended for a proper operation.
Power off feature
In some applications, where it might be required to turn off one of the power supplies
powering up the level translator, the device is automatically disabled when V
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
L
CC
Truth table
H
H
power supply referred.
OE
L
(1)
(1)
power supply referred.
Doc ID 15967 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)
CC
(1)
VL
supply is
5/20