2 I C Muxes, Address Translators, Buffers & Accelerators MAIN BOARD CARD 1 BACKPLANE BUS BUFFER MASTER MASTER MUX CARD 2 SLAVE RISE TIME ACCELERATOR SLAVE ADDRESS TRANSLATOR SLAVE LTC4314: Pin-Selectable 1:4 I2C Multiplexer with Bus Buffer Features nn nn nn nn nn nn Bidirectional Buffer for SDA and SCL Lines High Noise Margin with VIL = 0.3 • VCC Enable Pins Connect SDA and SCL Lines Selectable Rise Time Accelerator Current and Activation Voltage Level Shift 1.5V, 1.8V, 2.5V, 3.3V and 5V Busses Compatible with Non-Compliant VOL I2C Devices I2C Multiplexers and Address Translators Part Number Description Supply Voltage VBUS Channel Select Bus Buffer Rise Time Acc. Options Stuck Bus Circuitry HBM ESD LTC4305 1:2 Multiplexer 2.7 to 5.5V 2.2V to 5.5V I2C Bus • Strong/Off Packages Disconnect ±10kV 4mm × 5mm DFN-16 LTC4306 1:4 Multiplexer 2.7 to 5.5V 2.2V to 5.5V I2C Bus • Strong/Off LTC4312 1:2 Multiplexer 2.9 to 5.5V 1.5V to 5.5V ENABLE Pin • Strong/2mA/Off Disconnect ±10kV 4mm × 5mm QFN-24 Disconnect and Recovery ±4kV 4mm × 3mm DFN-14, MSOP-16 LTC4314 1:4 Multiplexer 2.9 to 5.5V 1.5V to 5.5V ENABLE Pin • Strong/2mA/Off Disconnect and Recovery ±4kV 4mm × 3mm DFN-20, SSOP-20 LTC4316 1:1 Translator 2.25 to 5.5V 2.5V to 5.5V Timeout ±4kV 3mm × 3mm DFN-10, MSOP-10 LTC4317 1:2 Translator 2.25 to 5.5V 2.5V to 5.5V Timeout ±4kV 5mm × 3mm DFN-16 LTC4318 2:2 Translator 2.25 to 5.5V 2.5V to 5.5V Timeout ±4kV 4mm × 4mm QFN-20 L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. GPIO ×2 LTC4313/LTC4315: I2C Bus Buffers with High Noise Margin and Stuck Bus Recovery Features nn nn nn nn nn 3.3V Prevents SDA and SCL Corruption During Live Board Insertion and Removal High Noise Margin with VIL = 0.3 • VCC Compatible with Non-Compliant I2C Devices That Drive a High VOL Fixed (LTC4313) or Adjustable (LTC4315) Rise Time Accelerator Current Level Shift 1.5V, 1.8V, 2.5V, 3.3V and 5V Busses 5V VCC LTC4313-1 VIL= 0.3VCC SCLIN SCLOUT SDAIN SDAOUT Stuck Bus Resolved with Automatic Clocking SDAOUT 5V/DIV NON-COMPLIANT I 2C DEVICE VOL= 0.6V RECOVERS STUCK LOW > 30ms Only Linear Technology bus buffers with stuck bus recovery and disconnect allow users to attempt recovery from an I2C bus stuck low. If SDAOUT or SCLOUT is low for 30ms, the connection between SDAIN and SDAOUT, and SCLIN and SCLOUT is broken. After a delay, the bus buffer automatically generates up to 16 clock pulses on SCLOUT in an attempt to unstick the bus. When SDAOUT and SCLOUT go high, reconnection occurs when I2C transactions on both busses are complete. DISCONNECT AT TIMEOUT SDAIN 5V/DIV AUTOMATIC CLOCKING SCLOUT 5V/DIV 200µs/DIV I2C Buffers and Rise Time Accelerators Part Number Hot Swappable Rise Time Acc. LTC4300A-1 • • 2.7V to 5.5V LTC4300A-2 • • (Note 1) 2.7V to 5.5V LTC4300A-3 • • 2.7V to 5.5V • LTC4301 • 2.7V to 5.5V • LTC4301L • 1V to 2.7V/ 5.5V (Note 2) • LTC4302-1 • • 2.7V to 5.5V • LTC4302-2 • • (Note 1) 2.7V to 5.5V • LTC4303 • • 2.7V to 5.5V • • • LTC4304 • • (Note 1) 2.7V to 5.5V • • • ±15kV RTA Enable MSOP-10, 3mm × 3mm DFN-10 LTC4307 • • 2.3V to 5.5V • • • ±5kV 60mV Offset Voltage MSOP-8, 3mm × 3mm DFN-8 LTC4307-1 • • • ±5kV 60mV Offset Voltage, HDMI Compliant MSOP-8, 3mm × 3mm DFN-8 LTC4308 • • 1V to 2.3V/ 5.5V (Note 3) • • • ±6kV –200mV VOS I-to-O, 300mV VOS O-to-I MSOP-8, 3mm × 3mm DFN-8 LTC4309 • • (Note 1) 1.8V to 2.3V/ 5.5V (Note 4) • • • LTC4310 • • 3V to 5.5V • • • LTC4311 Bidirectional Stuck Bus GPIO Level Disconnect/ or HBM Translation Recovery Enable Ready VCC2 Fault ESD • 2.3V to 5.5V • • • ±2kV • ±2kV Packages MSOP-8 RTA Enable MSOP-8 MSOP-8, 3mm × 3mm DFN-8 • ±10kV Supply Independent MSOP-8, 3mm × 3mm DFN-8 • ±10kV Supply Independent, Level Translates from 1V MSOP-8, 3mm × 3mm DFN-8 • ±2kV Addressable, 2 GPIOs MSOP-10 • ±2kV Addressable, 1 GPIO • ±15kV • • • • LTC4313 • • 1.5V to 5.5V • • • LTC4315 • • (Note 1) 1.5V to 5.5V • • • Note Note Note Note Comments ±2kV • • MSOP-10 MSOP-8, 3mm × 3mm DFN-8 ±6kV 60mV Offset Voltage, RTA Enable, Stuck Bus Disable 2 SSOP-16, 4mm × 3mm DFN-12 ±5kV Full I C Isolation 3mm × 3mm DFN-10, MSOP-10 ±8kV Rise Time Accelerator Only 2mm × 2mm DFN-6, 6-ld SC70 ±4kV VIL = 0.3VCC, Adjustable RTA SSOP-8, 3mm × 3mm DFN-8 ±4kV VIL = 0.3VCC, Adjustable RTA, Stuck Bus Disable MSOP-12, 4mm × 3mm DFN-12 1: Rise time accelerator circuitry can be disabled. 2: SCLIN and SDAIN down to 1V, SDAOUT and SCLOUT from 2.7V to 5.5V. 3: SCLIN and SDAIN down to 1V, SDAOUT and SCLOUT from 2.3V to 5.5V. 4: SCLIN and SDAIN down to 1.8V, SDAOUT and SCLOUT from 2.3V to 5.5V. www.linear.com/busbuffers n 1-800-4-LINEAR 0715F