PI6ULS5V9509 2 Level Translating I C-Bus/SMBus Repeater with Tiny Package Features Description 2 Bidirectional Buffer Isolates Capacitance and Allows The PI6ULS5V9509 is a level-translating I C-bus/SMBus 400pF on Port B of the Device repeater. It can provide bidirectional-level translation between Port A Operating Supply Voltage Range of 1.1V to low voltage (down to 1.1V) and high voltage (2.5V to 5.5V) in 2 V - 1.0V mixed-mode applications, and it enables I C and similar bus CC(B) Port B Operating Supply Voltage Range of 2.5V to 5.5V systems to be extended, without degradation of performance Voltage Level Translation from 1.1V to V - 1.0V and even during level shifting. CC(B) from 2.5V to 5.5V The PI6ULS5V9509 enables the system designer to isolate two Requires no External Pullup Resistors on Lower Voltage halves of a bus for both voltage and capacitance, Port A 2 accommodating more I C devices or longer trace length. It Open-Drain Port B Inputs/Outputs 2 also permits extension of the I C-bus by providing Lockup-Free Operation bidirectional buffering for both the data (SDA) and the clock Supports Arbitration and Clock Stretching Across the (SCL) lines, thus allowing two buses of 400pF to be connected Repeater 2 in an I C application. 2 Accommodates Standard Mode and Fast Mode I C-Bus The bus port B drivers are compliant with SMBus I/O levels, Devices and Multiple Masters 2 while port A uses a current sensing mechanism to detect the Powered-off High-Impedance I C-bus Pins input or output LOW signal, which prevents bus lockup. Port 5V Tolerant B SCL, SDA and Enable Pins A uses a 1mA current source for pullup and a 200 pulldown 0Hz to 400kHz Clock Frequency driver. This result in a LOW on the port A accommodating (Note: The maximum system operating frequency can be smaller voltage swings. The output pulldown on the port A less than 400kHz because of delays added by the repeater.) internal buffer LOW is set for approximately 0.2V, while the ESD Protection Exceeds 8KV HBM per JESD22-A114 input threshold of the internal buffer is set about 50mV lower Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2) than that of the output voltage LOW. When the port A I/O is Halogen and Antimony Free. Green Device (Note 3) driven LOW internally, the LOW is not recognized as a LOW Package: MSOP-8, SOIC-8 and UQFN1.6x1.6-8L by the input. This prevents a lockup condition from occurring. Pin Configuration The output pulldown on the port B drives a hard LOW, and 2 the input level is set at 0.3 of SMBus or I C-bus voltage level, 2 which enables port B to connect to any other I C-bus devices or buffer. The PI6ULS5V9509 drivers are not enabled unless V is CC(A) above 0.8 V and V is above 2.5 V. The enable (EN) pin can CC(B) also be used to turn the drivers on and off under system control. Caution should be observed to only change the state SOIC-8 and MSOP-8 of the EN pin when the bus is idle. Pin Description Pin No Pin Name Description 1 V Port A Supply Voltage CC(A) 2 A1 Port A (Lower Voltage Side) 3 A2 Port A (Lower Voltage Side) 4 GND Supply Ground (0V) 5 EN Active HIGH Repeater Enable Input 2 6 B2 Port B (SMBus/I C-Bus Side) 2 7 B1 Port B (SMBus/I C-Bus Side) 8 V Port B Supply Voltage UQFN1.6x1.6-8L(Top View) CC(B) Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS), 2011/65/EU (RoHS 2) & 2015/863/EU (RoHS 3) compliant. 2. See PI6ULS5V9509 Block Diagram EN Function A1 = B1 H A2= B2 L Disabled Figure 1: Block Diagram Maximum Ratings Note: Storage Temperature .................................................. -55C to +125C Stresses greater than those listed under MAXIMUM Supply Voltage Port B .................................................. -0.5V to +6.0V RATINGS may cause permanent damage to the Supply Voltage Port A ................................................... -0.5V to+6.0V device. This is a stress rating only and functional operation of the device at these or any other condi- DC Input Voltage ......................................................... -0.5V to +6.0V tions above those indicated in the operational sec- Control Input Votage(EN) .............................................. -0.5V to+6.0V tions of this specification is not implied. Exposure Total Power Dissipation ............................................................ 100mA to absolute maximum rating conditions for extended Input/Output Current (Port A & B) ............................................. 20mA periods may affect reliability. Input Current (EN, V , V , GND) .................................... 20mA CC(A) CC(B) ESD: HBM Mode ....................................................................... 8000V Recommended Operation Conditions GND = 0V Tamb = -40C to +85C unless otherwise specified 1 Symbol Parameter Test Conditions Min Typ Max Unit Vcc Supply Voltage Port B 2.5 5.5 V (B) V - CC(B) Vcc Supply Voltage Port A 1.1 V (A) 1.0 All port A static HIGH 0.25 0.45 0.9 I Supply Current on Pin V mA CC(A) CC(A) All port A static LOW 1.25 3.0 5 I Supply Current on Pin V All port B static HIGH 0.5 0.9 1.1 mA CC(B) CC(B) Note: 1. Typical values with V = 1.1 V, V = 5 V. CC(A) CC(B) PI6ULS5V9509 www.diodes.com May 2019 Document Number DS41884 Rev 1 - 2 2 Diodes Incorporated