FXLA108

FLXA108 — Low-Voltage Dual-Supply 8-Bit Voltage Translator March 2009 FXLA108 Low-Voltage Dual-Supply 8-Bit Voltage Translator with Configurable Voltage Supplies and Signal Levels, 3-State Outputs, and Auto Direction Sensing Features Bi-Directional Interface between Two Levels: from 1.1V to 3.6V Fully Configurable: Inputs and Outputs Track VCC Non-Preferential Power-Up; Either VCC May Be Powered Up First Outputs Remain in 3-State Until Active VCC Level is Reached Outputs Switch to 3-State if Either VCC is at GND Power-Off Protection Bus-Hold on Data Inputs Eliminates the Need for Pull-Up Resistors Control Input (/OE) Referenced to VCCA Voltage Packaged in 20-Terminal DQFN (2.5mm x 4.5mm) Direction Control Not Necessary 100Mbps Throughput when Translating Between 1.8V and 2.5V ESD Protection Exceeds: - 8kV HBM (per JESD22-A114 &Mil Std 883e 3015.7) - 2kV CDM (per ESD STM 5.3) Description The FXLA108 is a configurable dual-voltage supply translator for both uni-directional and bi-directional voltage translation between two logic levels. The device allows translation between voltages as high as 3.6V to as low as 1.1V. The A port tracks the VCCA level and the B port tracks the VCCB level. This allows for bi-directional voltage translation over a variety of voltage levels: 1.2V, 1.5V, 1.8V, 2.5V, and 3.3V. The device remains in three-state until both VCCs reach active levels, allowing either VCC to be powered up first. Internal power-down control circuits place the device in 3-state if either VCC is removed. The /OE input, when HIGH, disables both the A and B ports by placing them in a 3-state condition. The /OE input is supplied by VCCA. The FXLA108 supports bi-directional translation without the need for a direction control pin. The two ports of the device have auto-direction sense capability. Either port may sense an input signal and transfer it as an output signal to the other port. Applications Laptops, Notebooks, Routers, Switches Ordering Information Part Number FXLA108BQX Operating Temperature Range -40 to 85°C Eco Status Green Package 20-Terminal DQFN 2.5mm x 4.5mm Package Packing Method Tape and Reel For Fairchild’s definition of “green” Eco Status, please visit: http://www.fairchildsemi.com/company/green/rohs_green.html. © 2009 Fairchild Semiconductor Corporation FXLA108 • Rev. 1.0.0 www.fairchildsemi.com FLXA108 — Low-Voltage Dual-Supply 8-Bit Voltage Translator Pin Configuration VCCA VCCB 1 20 19 B0 18 B1 17 B2 16 B3 15 B4 14 B5 13 B6 12 B7 A0 2 A1 3 A2 4 A3 5 A4 6 A5 7 A6 8 A7 9 10 11 GND /OE Figure 1. Pin Configuration (Top Through View) Pin Definitions Pin # 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Name VCCA A0 A1 A2 A3 A4 A5 A6 A7 GND /OE B7 B6 B5 B4 B3 B2 B1 B0 VCCB Description A-Side Power Supply A-Side Inputs or 3-State Outputs A-Side Inputs or 3-State Outputs A-Side Inputs or 3-State Outputs A-Side Inputs or 3-State Outputs A-Side Inputs or 3-State Outputs A-Side Inputs or 3-State Outputs A-Side Inputs or 3-State Outputs A-Side Inputs or 3-State Outputs Ground Output Enable Input B-Side Inputs or 3-State Outputs B-Side Inputs or 3-State Outputs B-Side Inputs or 3-State Outputs B-Side Inputs or 3-State Outputs B-Side Inputs or 3-State Outputs B-Side Inputs or 3-State Outputs B-Side Inputs or 3-State Outputs B-Side Inputs or 3-State Outputs B-Side Power Supply © 2009 Fairchild Semiconductor Corporation FLXA108 • Rev. 1.0.0 www.fairchildsemi.com 2 FLXA108 — Low-Voltage Dual-Supply 8-Bit Voltage Translator Functional Diagram Figure 2. Functional Diagram Functional Table Control /OE LOW Logic Level HIGH Logic Level Normal Operation 3-State Outputs © 2009 Fairchild Semiconductor Corporation FLXA108 • Rev. 1.0.0 www.fairchildsemi.com 3 FLXA108 — Low-Voltage Dual-Supply 8-Bit Voltage Translator Absolute Maximum Ratings Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be operable above the recommended operating conditions and stressing the parts to these levels is not recommended. In addition, extended exposure to stresses above the recommended operating conditions may affect device reliability. The absolute maximum ratings are stress ratings only. Symbol VCC VI Parameter Supply Voltage DC Input Voltage VCCA VCCB Conditions Min. -0.5 -0.5 -0.5 -0.5 -0.5 -0.5 -0.5 Max. 4.6 4.6 4.6 4.6 4.6 VCCA +0.5 VCCB +0.5 -50 -50 +50 Unit V V I/O Ports A and B Control Input (/OE) Output 3-State Output Active (An) Output Active (Bn) VI