|Package | PIN:||TSSOP (PW) | 14|
|Temp:||Q (-40 to 125)|
- Provides Bidirectional Voltage Translation With No Direction Terminal
- Supports up to 100-MHz up Translation and Greater Than 100-MHz Down Translation
at ≤ 30-pF Capacitor Load and up to 40-MHz Up/Down Translation at 50-pF Capacitor Load
- Supports Ioff, Partial Power Down Mode (Refer to Feature Description)
- Allows Bidirectional Voltage Level Translation Between
- 0.8 V ↔ 1.8, 2.5, 3.3, 5 V
- 1.2 V ↔ 1.8, 2.5, 3.3, 5 V
- 1.8 V ↔ 2.5, 3.3, 5V
- 2.5 V ↔ 3.3, 5 V
- 3.3 V ↔ 5V
- Low Standby Current
- 5 V Tolerance I/O Port to Support TTL
- Low Ron Provides Less Signal Distortion
- High-Impedance I/O Terminals For EN = Low
- Flow-Through Pinout for Ease PCB Trace Routing
- Latch-Up Performance Exceeds 100 mA Per JESD17
- –40°C to 125°C Operating Temperature Range
- ESD Performance Tested Per JESD 22
- 2000-V Human-Body Model (A114-B, Class II)
- 200-V Machine Model (A115-A)
- 1000-V Charged-Device Model(C101)
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Texas Instruments LSF0204PWR
The LSF family consists of bidirectional voltage level translators that operate from 0.8V to 4.5 V (Vref_A) and 1.8 V to 5.5 V (Vref_B). This range allows for bidirectional voltagetranslations between 0.8 V and 5.0 V without the need for a direction terminal in open-drain orpush-pull applications. The LSF family supports level translation applications with transmissionspeeds greater than 100 MHz for open-drain systems that utilize a 15-pF capacitance and 165-Ωpull-up resistor.
When the An or Bn port is LOW, the switch is in the ON-state and a low resistanceconnection exists between the An and Bn ports. The low Ron of the switchallows connections to be made with minimal propagation delay and signal distortion. The voltage onthe A or B side will be limited to Vref_A and can be pulled up to any level between Vref_A and 5 V.This functionality allows a seamless translation between higher and lower voltages selected by theuser without the need for directional control.
The supply voltage (Vpu#) for each channel may be individuallyset up with a pull up resistor. For example, CH1 may be used in up-translation mode (1.2 V ↔ 3.3 V)and CH2 in down-translation mode (2.5 V ↔ 1.8 V).
When EN is HIGH, the translator switch is on, and the An I/O is connected to the Bn I/O,respectively, allowing bidirectional data flow between ports. When EN is LOW, the translator switchis off, and a high-impedance state exists between ports. The EN input circuit is designed to besupplied by Vref_A. EN must be LOW to ensure the high-impedance state during power-up orpower-down.