1 Features
• Provides bidirectional voltage translation with no
direction pin
• Supports up to 100MHz up translation and greater
than 100MHz down translation at
≤ 30pF capacitive load and up To 40MHz up or
down translation at 50pF capacitive load
• Allows bidirectional voltage-level translation
between
– 0.95V ↔ 1.8/2.5/3.3/5V
– 1.2V ↔ 1.8/2.5/3.3/5V
– 1.8V ↔ 2.5/3.3/5V
– 2.5V ↔ 3.3/5V
– 3.3V ↔ 5V
• Low standby current
• 5V tolerance I/O port to support TTL
• Low RON provides less signal distortion
• High-impedance I/O pins for EN = Low
• Flow-through pinout for easy PCB trace routing
• Latch-up performance >100mA per JESD 17
• –40°C to 125°C operating temperature range

2 Applications
• GPIO, MDIO, PMBus, SMBus, SDIO, UART, I2C,
and other interfaces in telecom infrastructure
• Enterprise systems
• Communications equipment
• Personal electronics
• Industrial applications

3 Description
The LSF family of devices supports bidirectional
voltage translation without the need for DIR pin which
minimizes system effort (for PMBus, I2C, SMBus, and
so forth). The LSF family of devices supports up
to 100MHz up translation and greater than 100MHz
down translation at ≤ 30pF capacitive load and up
to 40MHz up or down translation at 50pF capacitive
load which allows the LSF family to support more
consumer or telecom interfaces (MDIO or SDIO).
LSF family supports 5V tolerance on I/O port which
makes it compatible with TTL levels in industrial and
telecom applications. The LSF family is able to set up
different voltage translation levels which makes it very
flexible.