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© 2004 Fairchild Semiconductor Corporation DS500891 www.fairchildsemi.com April 2004 Revised June 2004 FXL4T245 Low Voltage Dual Supply 4-Bit Signal Translator with Configurable Voltage Supplies and Signal Levels and 3-STATE Outputs FXL4T245 Low Voltage Dual Supply 4-Bit Signal Translator with Configurable Voltage Supplies and Signal Levels and 3-STATE Outputs General Description The FXL4T245 is a configurable dual-voltage-supply trans- lator designed for bi-directional voltage translation of sig- nals between two voltage 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. Both ports are designed to accept supply voltage levels from 1.1V to 3.6V. This allows for bi- directional voltage translation over a variety of voltage lev- The device remains in 3-STATE until both VCC s reach active levels allowing either VCC to be powered-up first. The device also contains power down control circuits that place the device in 3-STATE if either VCC is removed. The Transmit/Receive (T/R ) input determines the direction of data flow through the device. The OE input, when HIGH, disables both the A and B Ports by placing them in 3-STATE condition. The FXL4T245 is designed so that the control pins (T/R and OE) are supplied by VCCA .

Features

■ Bi-directional interface between any 2 levels from 1.1V to 3.6V ■ Fully configurable, inputs track VCC level ■ Non-preferential power-up sequencing; either VCC may be powered-up first ■ No power-up sequencing required ■ 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 ■ Control inputs (T/R , OE) levels are referenced to VCCA voltage ■ Packaged in 14-terminal DQFN (2.5mm x 3.0mm) package ■ ESD protection exceeds:

  • 4kV HBM ESD (per JESD22-A114 & Mil Std 883e 3015.7)
  • 8kV HBM I/O to GND ESD (per JESD22-A114 & Mil Std 883e 3015.7)
  • 1kV CDM ESD (per ESD STM 5.3)
  • 200V MM ESD (per JESD22-A115 & ESD STM5.2) Ordering Code: Order Number Package Number Package Description FXL4T245BQX MLP014A 14-Terminal Depopulated Quad Very-Thin Flat Pack No Leads (DQFN), JEDEC MO-241, 2.5 x 3.0mm

www.fairchildsemi.com 2 FXL4T245 Terminal Descriptions Truth Table H = HIGH Voltage Level L = LOW Voltage Level X = Don’t Care Connection Diagram Terminal Assignments for DQFN (Top View) Terminal Assignment Power-Up/Power-Down Sequencing FXL translators offer an advantage in that either VCC may be powered up first. This benefit derives from the chip design. When either VCC is at 0 volts, outputs are in a HIGH-Impedance state. The control inputs (T/R and OE) are designed to track the VCCA supply. A pull-up resistor tying OE to VCCA should be used to ensure that bus con- tention, excessive currents, or oscillations do not occur during power-up/power-down. The size of the pull-up resis- tor is based upon the current-sinking capability of the OE driver. The recommended power-up sequence is the following: 1. Apply power to either VCC . 2. Apply power to the T/R input (Logic HIGH for A-to-B operation; Logic LOW for B-to-A operation) and to the respective data inputs (A Port or B Port). This may occur at the same time as Step 1. 3. Apply power to other VCC . 4. Drive the OE input LOW to enable the device. The recommended power-down sequence is the following: 1. Drive OE input HIGH to disable the device. 2. Remove power from either VCC . 3. Remove power from other VCC . Terminal Names

Description

T/R Transmit/Receive Input An Side A Inputs or 3-STATE Outputs Bn Side B Inputs or 3-STATE Outputs VCCA Side A Power Supply VCCB Side B Power Supply GND Ground Inputs Outputs OE T/R L L Bus B Data to Bus A L H Bus A Data to Bus B Terminal Number Terminal Name 1V CCA 2A 0 3A 1 4A 2 5A 3 6T /R 7G N D 8G N D 9O E

10 B 3

11 B 2

12 B 1

13 B 0

14 V CCB

3 www.fairchildsemi.com FXL4T245 Absolute Maximum Ratings(Note 1) Recommended Operating Conditions (Note 3) Note 1: The “Absolute Maximum Ratings” are those values beyond which the safety of the device cannot be guaranteed. The device should not be operated at these limits. The parametric values defined in the Electrical Characteristics tables are not guaranteed at the absolute maximum ratings. The “Recommended Operating Conditions” table will define the conditions for actual device operation. Note 2: IO Absolute Maximum Rating must be observed. Note 3: All unused inputs must be held at VCCI or GND. Supply Voltage VCCA −0.5V to +4.6V VCCB −0.5V to +4.6V DC Input Voltage (VI) I/O Port A −0.5V to +4.6V I/O Port B −0.5V to +4.6V Control Inputs (T/R , OE) −0.5V to +4.6V Output Voltage (VO ) (Note 2) Outputs 3-STATE −0.5V to +4.6V Outputs Active (An) −0.5V to VCCA + 0.5V Outputs Active (Bn) −0.5V to VCCB + 0.5V DC Input Diode Current (IIK) VI < 0V −50 mA DC Output Diode Current (IOK ) VO < 0V −50 mA VO > VCC +50 mA DC Output Source/Sink Current (IOH /IOL ) −50 mA / +50 mA DC V CC or Ground Current per Supply Pin (ICC ) ±100 mA Storage Temperature Range (TSTG ) −65°C to +150°C Power Supply Operating (VCCA or VCCB ) 1.1V to 3.6V Input Voltage Port A 0.0V to 3.6V Port B 0.0V to 3.6V Control Inputs (T/R, OE) 0.0V to V CCA Output Current in IOH /IOL VCC 3.0V to 3.6V ±24 mA 2.3V to 2.7V ±18 mA 1.65V to 1.95V ±6 mA 1.4V to 1.65V ±2 mA 1.1V to 1.4V ±0.5 mA Free Air Operating Temperature (TA) −40°C to +85°C Minimum Input Edge Rate (∆V/∆t) VCCA/B = 1.1V to 3.6V 10 ns/V Symbol Parameter Conditions VCCI VCCO Min Max Units (V) (V) VIH High Level Input Voltage Data Inputs A n, Bn 2.7 - 3.6 1.1 - 3.6 2.0 V 1.65 - 2.3 0.65 x V CCI 1.4 - 1.65 0.65 x V CCI 1.1 - 1.4 0.9 x V CCI Control Pins/OE, T/R 2.7 - 3.6 1.1 - 3.6 2.0 (Referenced to VCCA ) 2.3 - 2.7 1.6 1.65 - 2.3 0.65 x V CCA 1.4 - 1.65 0.65 x V CCA 1.1 - 1.4 0.9 x V CCA VIL Low Level Input Voltage Data Inputs A n, Bn 2.7 - 3.6 1.1 - 3.6 0.8 V 1.65 - 2.3 0.35 x V CCI 1.4 - 1.65 0.35 x V CCI 1.1 - 1.4 0.1 x V CCI Control Pins/OE, T/R 2.7 - 3.6 1.1 - 3.6 0.8 (Referenced to VCCA ) 2.3 - 2.7 0.7 1.65 - 2.3 0.35 x V CCA 1.4 - 1.65 0.35 x V CCA 1.1 - 1.4 0.1 x V CCA

www.fairchildsemi.com 4 FXL4T245 Note 4: VCCI = the VCC associated with the data input under test. Note 5: VCCO = the VCC associated with the output under test. Note 6: Don ’t Care = Any valid logic level. Note 7: Reflects current per supply, VCCA or VCCB . Symbol Parameter Conditions VCCA VCCB Min Max Units (V) (V) V (Note 5) IOH = −12 mA 2.7 2.7 2.2 IOH = −18 mA 3.0 3.0 2.4 IOH = −24 mA 3.0 3.0 2.2 IOH = −6 mA 2.3 2.3 2.0 IOH = −12 mA 2.3 2.3 1.8 IOH = −18 mA 2.3 2.3 1.7 IOH = −6 mA 1.65 1.65 1.25 IOH = −2 mA 1.4 1.4 1.05 IOH = −0.5 mA 1.1 1.1 0.75 x V CC0 V (Note 5) IOL = 12 mA 2.7 2.7 0.4 IOL = 18 mA 3.0 3.0 0.4 IOL = 24 mA 3.0 3.0 0.55 IOL =12 mA 2.3 2.3 0.4 IOL = 18 mA 2.3 2.3 0.6 IOL = 6 mA 1.65 1.65 0.3 IOL = 2 mA 1.4 1.4 0.35 IOL = 0.5 mA 1.1 1.1 0.3 x V CC0 IOFF Power Off Leakage Current A n, VI or VO = 0V to 3.6V 0 3.6 ±10.0 µA Bn, VI or VO = 0V to 3.6V 3.6 0 ±10.0 IOZ 3-STATE Output Leakage A n, Bn OE = VIH 3.6 3.6 ±10.0 µA(Note 6) 0 ≤ VO ≤ 3.6V B n, OE = Don’t Care 0 3.6 +10.0 VI = VIH or VIL An, OE = Don’t Care 3.6 0 +10.0 ICCA Quiescent Supply Current V I = VCCA or GND; IO = 0 0 1.1 - 3.6 −10.0 µA VI = VCCA or GND; IO = 0 1.1 - 3.6 0 10.0 µA ICCB Quiescent Supply Current V I = VCCB or GND; IO = 0 1.1 - 3.6 0 −10.0 µA VI = VCCB or GND; IO = 0 0 1.1 - 3.6 10.0 µA ∆ICCA/B Increase in ICC per Input; V IH = 3.0 3.6 3.6 500 µA Other Inputs at VCC or GND

5 www.fairchildsemi.com FXL4T245 Symbol Parameter TA = −40°C to +85°C UnitsVCCB = 3.0V to 3.6V VCCB = 2.3V to 2.7V VCCB = 1.65V to 1.95V VCCB = 1.4V to 1.6V VCCB = 1.1V to 1.3V Min Max Min Max Min Max Min Max Min Max ns ns ns Symbol Parameter TA = −40°C to +85°C UnitsVCCB = 3.0V to 3.6V VCCB = 2.3V to 2.7V VCCB = 1.65V to 1.95V VCCB = 1.4V to 1.6V VCCB = 1.1V to 1.3V Min Max Min Max Min Max Min Max Min Max ns ns ns Symbol Parameter TA = −40°C to +85°C UnitsVCCB = 3.0V to 3.6V VCCB = 2.3V to 2.7V VCCB = 1.65V to 1.95V VCCB = 1.4V to 1.6V VCCB = 1.1V to 1.3V Min Max Min Max Min Max Min Max Min Max ns ns ns Symbol Parameter TA = −40°C to +85°C UnitsVCCB = 3.0V to 3.6V VCCB = 2.3V to 2.7V VCCB = 1.65V to 1.95V VCCB = 1.4V to 1.6V VCCB = 1.1V to 1.3V Min Max Min Max Min Max Min Max Min Max ns ns ns

www.fairchildsemi.com 6 FXL4T245 Capacitance Symbol Parameter TA = −40°C to +85°C UnitsVCCB = 3.0V to 3.6V VCCB = 2.3V to 2.7V VCCB = 1.65V to 1.95V VCCB = 1.4V to 1.6V VCCB = 1.1V to 1.3V Min Max Min Max Min Max Min Max Min Max ns ns ns Symbol Parameter Conditions TA = +25°C Units Typical C IN Input Capacitance Control Pins (OE, T/R)V CCA = VCCB = 3.3V, VI = 0V or VCCA/B 4.0 pF C I/O Input/Output Capacitance An, Bn Ports V CCA = VCCB = 3.3V, VI = 0V or VCCA/B 5.0 pF C PD Power Dissipation Capacitance V CCA = VCCB = 3.3V, VI = 0V or VCC , F = 10 MHz 20.0 pF

www.fairchildsemi.com 8 FXL4T245 Tape and Reel Specification Tape Form at for DQFN TAPE DIMENSIONS inches (millimeters) REEL DIMENSIONS inches (millimeters) Package Tape Number Cavity Cover Tape Designator Section Cavities Status Status Leader (Start End) 125 (typ) Empty Sealed BQX Carrier 3000 Filled Sealed Trailer (Hub End) 75 (typ) Empty Sealed Tape Size ABCDN W 1 W 2

9 www.fairchildsemi.com FXL4T245 Low Voltage Dual Supply 4-Bit Signal Translator with Configurable Voltage Supplies and Signal Levels and 3-STATE Outputs Physical Dimensions inches (millimeters) unless otherwise noted 14-Terminal Depopulated Quad Very-Thin Flat Pack No Leads (DQFN), JEDEC MO-241, 2.5 x 3.0mm Fairchild does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and Fairchild reserves the right at any time without notice to change said circuitry and specifications. LIFE SUPPORT POLICY FAIRCHILD ’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be rea- sonably expected to result in a significant injury to the user. 2. A critical component in any component of a life support device or system whose failure to perform can be rea- sonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. www.fairchildsemi.com

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