1 Features
• Provides bidirectional voltage translation with no
direction pin
• Supports up to 100-MHz up translation and greater
than 100-MHz down translation at
≤ 30 pF cap load and up To 40-MHz up/down
translation at 50 pF cap load
• Allows bidirectional voltage-level translation
between
– 0.95 V ↔ 1.8/2.5/3.3/5 V
– 1.2 V ↔ 1.8/2.5/3.3/5 V
– 1.8 V ↔ 2.5/3.3/5 V
– 2.5 V ↔ 3.3/5 V
– 3.3 V ↔ 5 V
• Low standby current
• 5-V 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 >100 mA 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
100-MHz up translation and greater than 100-MHz
down translation at ≤ 30 pF cap load and up to 40-
MHz up/down translation at 50 pF cap load which
allows the LSF family to support more consumer or
telecom interfaces (MDIO or SDIO).
LSF family supports 5-V 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 on each channel
which makes it very flexible.