FXLA108 Low-Voltage Dual-Supply 8-Bit Voltage Translator with Configurable Voltage Supplies and Signal Levels, 3-State Outputs, and Auto Direction Sensing Features Description Bi-Directional Interface between Two Levels: from 1.1V to 3.6V Fully Configurable: Inputs and Outputs Track VCC Outputs Remain in 3-State Until Active VCC Level is Reached 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. Outputs Switch to 3-State if Either VCC is at GND Control Input (/OE) Referenced to VCCA Voltage ESD Protection Exceeds: - 8kV HBM (per JESD22-A114 &Mil Std 883e 3015.7) - 2kV CDM (per ESD STM 5.3) Non-Preferential Power-Up; Either VCC May Be Powered Up First Power-Off Protection Bus-Hold on Data Inputs Eliminates the Need for Pull-Up Resistors Packaged in 20-Terminal DQFN (2.5mm x 4.5mm) Direction Control Not Necessary 100Mbps Throughput when Translating Between 1.8V and 2.5V 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 Eco Status Package Packing Method -40 to 85°C Green 20-Terminal DQFN 2.5mm x 4.5mm Package 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 March 2009 VCCA VCCB 20 1 A0 2 19 B0 A1 3 18 B1 A2 4 17 B2 A3 5 16 B3 A4 6 15 B4 A5 7 14 B5 A6 8 13 B6 A7 9 12 B7 10 11 GND /OE Figure 1. Pin Configuration (Top Through View) Pin Definitions Pin # Name Description 1 VCCA 2 A0 A-Side Inputs or 3-State Outputs 3 A1 A-Side Inputs or 3-State Outputs 4 A2 A-Side Inputs or 3-State Outputs 5 A3 A-Side Inputs or 3-State Outputs 6 A4 A-Side Inputs or 3-State Outputs 7 A5 A-Side Inputs or 3-State Outputs 8 A6 A-Side Inputs or 3-State Outputs 9 A7 A-Side Inputs or 3-State Outputs 10 GND 11 /OE 12 B7 B-Side Inputs or 3-State Outputs 13 B6 B-Side Inputs or 3-State Outputs 14 B5 B-Side Inputs or 3-State Outputs 15 B4 B-Side Inputs or 3-State Outputs 16 B3 B-Side Inputs or 3-State Outputs 17 B2 B-Side Inputs or 3-State Outputs 18 B1 B-Side Inputs or 3-State Outputs 19 B0 B-Side Inputs or 3-State Outputs 20 VCCB FLXA108 — Low-Voltage Dual-Supply 8-Bit Voltage Translator Pin Configuration A-Side Power Supply Ground Output Enable Input 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 Outputs /OE LOW Logic Level Normal Operation HIGH Logic Level 3-State © 2009 Fairchild Semiconductor Corporation FLXA108 • Rev. 1.0.0 www.fairchildsemi.com 3 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 Parameter Supply Voltage VI DC Input Voltage VO Output Voltage (2) IIK DC Input Diode Current IOK DC Output Diode Current IOH/IOL ICC TSTG Conditions Min. Max. VCCA -0.5 4.6 VCCB -0.5 4.6 I/O Ports A and B -0.5 4.6 Control Input (/OE) -0.5 4.6 Output 3-State -0.5 4.6 Output Active (An) -0.5 VCCA +0.5 Output Active (Bn) -0.5 VCCB +0.5 VI<0V -50 VO<0V -50 VO>VCC +50 DC Output Source/Sink Current V V V mA mA -50 +50 mA ±100 mA -65 +150 °C DC VCC or Ground Current (per Supply Pin) Storage Temperature Range Unit Notes: 1. IO absolute maximum ratings must be observed. 2. All unused inputs and input/outputs must be held at VCCi or GND. FLXA108 — Low-Voltage Dual-Supply 8-Bit Voltage Translator Absolute Maximum Ratings Recommended Operating Conditions The Recommended Operating Conditions table defines the conditions for actual device operation. Recommended operating conditions are specified to ensure optimal performance to the datasheet specifications. Fairchild does not recommend exceeding them or designing to Absolute Maximum Ratings. Symbol Parameter VCC Power Supply VIN Input Voltage TA Operating Temperature, Free Air dt/dV Minimum Input Edge Rate © 2009 Fairchild Semiconductor Corporation FLXA108 • Rev. 1.0.0 Conditions Operating VCCA or VCCB Ports A and B Control Input (/OE) VCCA/B = 1.1 to 3.6V Min. Max. Unit 1.1 3.6 V 0 3.6 V 0 VCCA V -40 +85 °C 10 ns/V www.fairchildsemi.com 4 The recommended power-up sequence is: 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 0V, outputs are in a high-impedance state. The control input (/OE) is designed to track the VCCA supply. A pull-up resistor tying /OE to VCCA should be used to ensure that bus contention, excessive currents, or oscillations do not occur during power-up or power-down. The size of the pull-up resistor is based upon the current-sinking capability of the device driving the /OE pin. © 2009 Fairchild Semiconductor Corporation FLXA108 • Rev. 1.0.0 1. 2. 3. Apply power to the first VCC. Apply power to the second VCC. Drive the /OE input LOW to enable the device. The recommended power-down sequence is: 1. 2. 3. Drive /OE input HIGH to disable the device. Remove power from either VCC. Remove power from other VCC. FLXA108 — Low-Voltage Dual-Supply 8-Bit Voltage Translator Power-Up/Power-Down Sequence www.fairchildsemi.com 5 TA=-40 to 85°C. Symbol Parameter Conditions Data Inputs An Control Pin /OE VIHA High-Level Input Voltage VCCA (V) VCCB (V) 2.70 to 3.60 2.00 2.30 to 2.70 1.60 1.65 to 2.30 1.10 to 3.60 .65xVCCA 1.40 to 1.65 .65xVCCA 1.10 to 1.40 .90xVCCA 2.70 to 3.60 2.00 2.30 to 2.70 Data Inputs Bn VIHB Data Inputs An Control Pin /OE VILA Low-Level Input Voltage VILB VOHA VOHB VOLA VOLB II(HOLD) Data Inputs Bn Min. Typ. Max. V 1.60 1.65 to 2.30 1.10 to 3.60 .65xVCCB 1.40 to 1.65 .65xVCCB 1.10 to 1.40 .90xVCCB V 2.70 to 3.60 .80 2.30 to 2.70 .70 1.65 to 2.30 1.10 to 3.60 .35xVCCA 1.40 to 1.65 .35xVCCA 1.10 to 1.40 .10xVCCA 2.70 to 3.60 .80 2.30 to 2.70 .70 1.65 to 2.30 1.10 to 3.60 .35xVCCB 1.40 to 1.65 .35xVCCB 1.10 to 1.40 .10xVCCB High-Level Output (3) Voltage IOH=-4µA 1.10 to 3.60 1.10 to 3.60 VCCA - .40 IOH=-4µA 1.10 to 3.60 1.10 to 3.60 VCCB - .40 Low-Level Output (3) Voltage IOL=4µA 1.10 to 3.60 1.10 to 3.60 .4 IOL=4µA 1.10 to 3.60 1.10 to 3.60 .4 Bus-Hold Input Minimum Drive Current Units VIN=0.80V 3.00 3.00 75.0 VIN=2.00V 3.00 3.00 -75.0 VIN=0.7V 2.30 2.30 45.0 VIN=1.60V 2.30 2.30 -45.0 V V FLXA108 — Low-Voltage Dual-Supply 8-Bit Voltage Translator DC Electrical Characteristics V VIN=0.57V 1.65 1.65 25.0 VIN=1.07V 1.65 1.65 -25.0 VIN=0.49V 1.40 1.40 11.0 VIN=0.91V 1.40 1.40 -11.0 VIN=0.11V 1.10 1.10 4.0 VIN=0.99V 1.10 1.10 -4.0 V µA Continued on following page… © 2009 Fairchild Semiconductor Corporation FLXA108 • Rev. 1.0.0 www.fairchildsemi.com 6 TA=-40 to 85°C. Symbol II(ODH) II(ODL) II IOFF IOZ ICCA/B ICCZ Parameter Bus-Hold Input Overdrive High (4) Current Conditions VCCA (V) VCCB (V) Min. 3.60 3.60 450.00 2.70 2.70 300.00 1.95 1.95 200.00 1.60 1.60 120.00 1.40 1.40 80.00 3.60 3.60 -450.00 2.70 2.70 -300.00 1.95 1.95 -200.00 1.60 1.60 -120.00 1.40 1.40 -80.00 1.10 to 3.60 3.60 An VO=0V to 3.6V 0 3.6 ±2.0 Bn VO=0V to 3.6V 3.60 0 ±2.0 An, Bn VO=0V or 3.6V, /OE=VIH 3.6 3.60 ±5.0 An VO=0V or 3.6V, /OE=GND 3.60 0 ±5.0 Bn VO=0V or 3.6V, /OE=GND 0 3.60 ±5.0 Data Inputs An, Bn Bus-Hold Input Overdrive Low (5) Current Data Inputs An, Bn Input Leakage Current Control Inputs /OE, VI=VCCA or GND Power-Off Leakage Current 3-State Output Leakage Quiescent Supply (6, 7) Current ICCA Quiescent Supply Current ICCB Max. Units µA µA ±1.0 µA µA µA VI=VCCI or GND; IO=0, /OE=GND 1.10 to 3.60 1.10 to 3.60 10.0 µA VI=VCCI or GND; IO=0, /OE=VIH 1.10 to 3.60 1.10 to 3.60 10.0 µA VI=VCCB or GND; IO=0 B-to-A Direction, /OE=GND 0 VI=VCCA or GND; IO=0 A-to-B Direction 1.10 to 3.60 0 10.0 VI=VCCA or GND; IO=0, A-to-B Direction, /OE=GND 1.10 to 3.60 0 -10.0 VI=VCCB or GND; IO=0 B-to-A Direction 0 1.10 to 3.60 FLXA108 — Low-Voltage Dual-Supply 8-Bit Voltage Translator DC Electrical Characteristics (Continued) -10.0 µA µA 1.10 to 3.60 10.0 Notes: 3. This is the output voltage for static conditions. Dynamic drive specifications are given in the Dynamic Output Electrical Characteristics table. 4. An external drive must source at least the specified current to switch LOW-to-HIGH. 5. An external drive must source at least the specified current to switch HIGH-to-LOW. 6. VCCI is the VCC associated with the input side. 7. Reflects current per supply, VCCA or VCCB. © 2009 Fairchild Semiconductor Corporation FLXA108 • Rev. 1.0.0 www.fairchildsemi.com 7 A Port (An) Output Load: CL=15pF, RL ≥ MΩ (CI/O=4pF), TA=-40 to 85°C Symbol Parameter VCCA=3.0V to 3.6V Typ. Max. VCCA=2.3V to 2.7V Typ. VCCA=1.65V to 1.95V Max. Typ. Max VCCA=1.4V to 1.6V Typ. VCCA=1.1V to 1.3V Max. Typ. Units trise Output Rise (9) Time A Port 3.0 3.5 4.0 5.0 7.5 ns tfall Output Fall Time A (10) Port 3.0 3.5 4.0 5.0 7.5 ns IOHD Dynamic Output Current (9) High -11.4 -7.5 -4.7 -3.2 -1.7 mA IOLD Dynamic Output Current (10) Low +11.4 +7.5 +4.7 +3.2 +1.7 mA VCCB=1.1V to 1.3V Units B Port (Bn) Output Load: CL=15pF, RL ≥ MΩ (CI/O=5pF), TA=-40 to 85°C Symbol Parameter VCCB=3.0V to 3.6V Typ. Max. VCCB=2.3V to 2.7V Typ. VCCB=1.65V to 1.95V Max. Typ. Max VCCB=1.4V to 1.6V Typ. Max. Typ. trise Output Rise (9) Time B Port 3.0 3.5 4.0 5.0 7.5 ns tfall Output Fall Time B (10) Port 3.0 3.5 4.0 5.0 7.5 ns IOHD Dynamic Output Current (9) High -12.0 -7.9 -5.0 -3.4 -1.8 mA IOLD Dynamic Output Current (10) Low +12.0 +7.9 +5.0 +3.4 +1.8 mA FLXA108 — Low-Voltage Dual-Supply 8-Bit Voltage Translator Dynamic Output Electrical Characteristic Notes: 8. Dynamic output characteristics are guaranteed, but not tested. 9. See Figure 7. 10. See Figure 8. © 2009 Fairchild Semiconductor Corporation FLXA108 • Rev. 1.0.0 www.fairchildsemi.com 8 VCCA = 3.0V to 3.6V, TA=-40 to 85°C Symbol Parameter VCCB=3.0V to 3.6V Min. tPLH,tPHL Max. VCCB=2.3V to 2.7V Min. VCCB=1.65V to 1.95V Max. Min. Max VCCB=1.4V to 1.6V Min. Max. VCCB=1.1V to 1.3V Units Typ. A to B 0.2 4.0 0.3 4.2 0.5 5.4 0.6 6.8 6.9 ns B to A 0.2 4.0 0.2 4.1 0.3 5.0 0.5 6.0 4.5 ns tPZL,tPZH /OE to A, /OE to B 1.7 1.7 1.7 1.7 1.7 µs tSKEW A Port, (11) B Port 0.5 0.5 0.5 1.0 1.0 ns VCCB=1.1V to 1.3V Units VCCA = 2.3V to 2.7V, TA=-40 to 85°C Symbol tPLH,tPHL Parameter VCCB=3.0V to 3.6V VCCB=2.3V to 2.7V VCCB=1.65V to 1.95V VCCB=1.4V to 1.6V Min. Max. Min. Max. Min. Max Min. Max. Typ. A to B 0.2 4.1 0.4 4.5 0.5 5.6 0.8 6.9 7.0 ns B to A 0.3 4.2 0.4 4.5 0.5 5.5 0.5 6.5 4.8 ns tPZL,tPZH /OE to A, /OE to B 1.7 1.7 1.7 1.7 1.7 µs tSKEW A Port, (11) B Port 0.5 0.5 0.5 1.0 1.0 ns VCCB=1.1V to 1.3V Units VCCA = 1.65V to 1.95V, TA=-40 to 85°C Symbol tPLH,tPHL Parameter VCCB=3.0V to 3.6V VCCB=2.3V to 2.7V VCCB=1.65V to 1.95V VCCB=1.4V to 1.6V Min. Max. Min. Max. Min. Max Min. Max. Typ. A to B 0.3 5.0 0.5 5.5 0.8 6.7 0.9 7.5 7.5 ns B to A 0.5 5.4 0.5 5.6 0.8 6.7 1.0 7.0 5.4 ns tPZL,tPZH /OE to A, /OE to B 1.7 1.7 1.7 1.7 1.7 µs tSKEW A Port, (11) B Port 0.5 0.5 0.5 1.0 1.0 ns FLXA108 — Low-Voltage Dual-Supply 8-Bit Voltage Translator AC Characteristics Note: 11. Skew is the variation of propagation delay between output signals and applies only to output signals on the same port An or Bn) and switching with the same polarity (LOW-to-HIGH or HIGH-to-LOW) (see Figure 10). Skew is guaranteed, but not tested. © 2009 Fairchild Semiconductor Corporation FLXA108 • Rev. 1.0.0 www.fairchildsemi.com 9 VCCA = 1.4V to 1.6V, TA=-40 to 85°C Symbol VCCB=3.0V to 3.6V Parameter Min. tPLH,tPHL Max. VCCB=2.3V to 2.7V Min. VCCB=1.65V to 1.95V Max. Min. Max VCCB=1.4V to 1.6V Min. Max. VCCB=1.1V to 1.3V Units Typ. A to B 0.5 6.0 0.5 6.5 1.0 7.0 1.0 8.5 7.9 ns B to A 0.6 6.8 0.8 6.9 0.9 7.5 1.0 8.5 6.1 ns tPZL,tPZH /OE to A, /OE to B 1.7 1.7 1.7 1.7 1.7 µs tSKEW A Port, (12) B Port 1.0 1.0 1.0 1.0 1.0 ns Units VCCA = 1.1V to 1.3V, TA=-40 to 85°C Symbol tPLH,tPHL tPZL,tPZH tSKEW Parameter VCCB=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 Typ. Typ. Typ. Typ. Typ. A to B 4.6 4.8 5.4 6.2 9.2 ns B to A 6.8 7.0 7.4 7.8 9.1 ns 1.7 1.7 1.7 1.7 1.7 µs 1.0 1.0 1.0 1.0 1.0 ns /OE to A, /OE to B A Port, B Port (12) Note: 12. Skew is the variation of propagation delay between output signals and applies only to output signals on the same port (An or Bn) and switching with the same polarity (LOW-to-HIGH or HIGH-to-LOW) (see Figure 10). Skew is guaranteed, but not tested. © 2009 Fairchild Semiconductor Corporation FLXA108 • Rev. 1.0.0 FLXA108 — Low-Voltage Dual-Supply 8-Bit Voltage Translator AC Characteristics (Continued) www.fairchildsemi.com 10 TA=-40 to 85°C. VCCB=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. Min. Min. Min. Typ. VCCA=3.00V to 3.60V 140 120 100 80 40 Mbps VCCA=2.30V to 2.70V 120 120 100 80 40 Mbps VCCA=1.65V to 1.95V 100 100 80 60 40 Mbps VCCA=1.40V to 1.60V 80 80 60 60 40 Mbps Typ. Typ. Typ. Typ. Typ. 40 40 40 40 40 VCCA VCCA=1.10V to 1.30V Units Mbps Notes: 13. Maximum data rate is guaranteed, but not tested. 14. Maximum data rate is specified in megabits per second (see Figure 9). It is equivalent to two times the F-toggle frequency, specified in megahertz. For example, 100Mbps is equivalent to 50MHz. Capacitance Symbol Parameter Conditions CIN Input Capacitance Control Pin (/OE) An CI/O Input/Output Capacitance Cpd Power Dissipation Capacitance © 2009 Fairchild Semiconductor Corporation FLXA108 • Rev. 1.0.0 Bn VCCA=VCCB=GND VCCA=VCCB=3.3V, /OE=VCCA VCCA=VCCB=3.3V, VI=0V or VCC, f=10MHz TA=+25°C Typical Units 3 pF 4 5 25 FLXA108 — Low-Voltage Dual-Supply 8-Bit Voltage Translator Maximum Data Rate(13, 14) pF pF www.fairchildsemi.com 11 VCC TEST SIGNAL DUT C1 R1 Figure 3. Test Circuit Table 1. Table 2. AC Test Conditions Test Input Signal Output Enable Control tPLH, tPHL Data Pulses 0V tPZL 0V HIGH to LOW Switch tPZH VCCI HIGH to LOW Switch AC Load VCCo C1 R1 1.2V± 0.1V 15pF 1MΩ 1.5V± 0.1V 15pF 1MΩ 1.8V ± 0.15V 15pF 1MΩ 2.5V ± 0.2V 15pF 1MΩ 3.3V ± 0.3V 15pF 1MΩ DATA IN Vmi FLXA108 — Low-Voltage Dual-Supply 8-Bit Voltage Translator Test Diagrams VCCI GND tpxx tpxx DATA OUT Vmo VCCO Figure 4. Waveform for Inverting and Non-Inverting Functions Notes: 15. Input tR = tF = 2.0ns, 10% to 90%. 16. Input tR = tF = 2.5ns, 10% to 90%, at VI = 3.0V to 3.6V only. © 2009 Fairchild Semiconductor Corporation FLXA108 • Rev. 1.0.0 www.fairchildsemi.com 12 Notes: 17. Input tR = tF = 2.0ns, 10% to 90%. 18. Input tR = tF = 2.5ns, 10% to 90%, at VI = 3.0V to 3.6V only. Figure 6. 3-State Output High Enable Time for Low Voltage Logic FLXA108 — Low-Voltage Dual-Supply 8-Bit Voltage Translator Figure 5. 3-State Output Low Enable Time for Low Voltage Logic Notes: 19. Input tR = tF = 2.0ns, 10% to 90%. 20. Input tR = tF = 2.5ns, 10% to 90%, at VI = 3.0V to 3.6V only. Table 3. Test Measure Points Symbol VMI VDD (21) VCCI /2 VMO VCCo /2 VX 0.9 x VCCo VY 0.1 x VCCo Note: 21. VCCI=VCCA for control pin /OE or VMI=(VCCA/2). © 2009 Fairchild Semiconductor Corporation FLXA108 • Rev. 1.0.0 www.fairchildsemi.com 13 VOH 80% x VCCO VOUT 20% x VCCO VOL Time IOHD ≈ (CL + CI / O ) × ΔVOUT (20% − 80%) • VCCO = (CL + CI / O ) × Δt t RISE Figure 7. Active Output Rise Time and Dynamic Output Current High VOH tfall 80% x VCCO VOUT 20% x VCCO VOL Time IOLD ≈ (CL + CI / O ) × Figure 8. ΔVOUT (80% − 20%) • VCCO = (CL + CI / O ) × Δt t FALL FLXA108 — Low-Voltage Dual-Supply 8-Bit Voltage Translator trise Active Output Fall Time and Dynamic Output Current Low tW VCCI DATA IN VCCI/2 VCCI/2 GND Maximum Data Rate, f = 1/tW Figure 9. Maximum Data Rate VCCO DATA OUTPUT Vmo Vmo GND tskew tskew VCCO DATA OUTPUT Vmo Vmo GND Figure 10. Output Skew Time Note: 22. tSKEW = (tpHLmax – tpHLmin) or (tpLHmax – tpLHmin) © 2009 Fairchild Semiconductor Corporation FLXA108 • Rev. 1.0.0 www.fairchildsemi.com 14 FLXA108 — Low-Voltage Dual-Supply 8-Bit Voltage Translator Physical Dimensions Figure 11. 20-Terminal DQFN 2.5mm x 4.5mm Package Package drawings are provided as a service to customers considering Fairchild components. Drawings may change in any manner without notice. Please note the revision and/or date on the drawing and contact a Fairchild Semiconductor representative to verify or obtain the most recent revision. Package specifications do not expand the terms of Fairchild’s worldwide terms and conditions, specifically the warranty therein, which covers Fairchild products. Always visit Fairchild Semiconductor’s online packaging area for the most recent package drawings: http://www.fairchildsemi.com/packaging/. © 2009 Fairchild Semiconductor Corporation FLXA108 • Rev. 1.0.0 www.fairchildsemi.com 15 FLXA108 — Low-Voltage Dual-Supply 8-Bit Voltage Translator © 2009 Fairchild Semiconductor Corporation FLXA108 • Rev. 1.0.0 www.fairchildsemi.com 16