FXLA108 FAIRCHILD | Alldatasheet
Document overview
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Technical content
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)
Applications
Laptops, Notebooks, Routers, Switches
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 V CCA level and the B port tracks the VCCB level. This allows for bi-directional voltage translation over a variety of voltage levels: 1.2V, The device remains in three-state until both V CCs reach active levels, allowing either V CC to be powered up first. Internal power-down control circuits place the device in 3-state if either V CC 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 V CCA. 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.
Ordering Information
FXLA108BQX -40 to 85°C Green 20-Terminal DQ FN 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.
Figure 1. Pin Configur ation (Top Through View)
1 V CCA A-Side Power Supply
2 A 0 A-Side Inputs or 3-State Outputs
3 A 1 A-Side Inputs or 3-State Outputs
4 A 2 A-Side Inputs or 3-State Outputs
5 A 3 A-Side Inputs or 3-State Outputs
6 A 4 A-Side Inputs or 3-State Outputs
7 A 5 A-Side Inputs or 3-State Outputs
8 A 6 A-Side Inputs or 3-State Outputs
9 A 7 A-Side Inputs or 3-State Outputs
10 GND Ground
12 B 7 B-Side Inputs or 3-State Outputs
13 B 6 B-Side Inputs or 3-State Outputs
14 B 5 B-Side Inputs or 3-State Outputs
15 B 4 B-Side Inputs or 3-State Outputs
16 B 3 B-Side Inputs or 3-State Outputs
17 B 2 B-Side Inputs or 3-State Outputs
18 B 1 B-Side Inputs or 3-State Outputs
19 B 0 B-Side Inputs or 3-State Outputs
20 V CCB B-Side Power Supply
Figure 2. Functional Diagram
© 2009 Fairchild Semiconductor Corporation www.fairchildsemi.com FLXA108 • Rev. 1.0.0 4 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 Parameter Conditions Min. Max. Unit VCCA -0.5 4.6 VCC Supply Voltage VCCB -0.5 4.6 V I/O Ports A and B -0.5 4.6 VI DC Input Voltage Control Input (/OE) -0.5 4.6 V Output 3-State -0.5 4.6 Output Active (An) -0.5 V CCA +0.5 VO Output Voltage (2) Output Active (Bn) -0.5 V CCB +0.5 V IIK DC Input Diode Current V I<0V -50 mA VO<0V -50 IOK DC Output Diode Current VO>VCC +50 mA IOH/IOL DC Output Source/Sin k Current -50 +50 mA ICC DC V CC or Ground Current (per Supply Pin) ±100 mA TSTG Storage Temperature Range -65 +150 °C Notes: 1. I O absolute maximum ratings must be observed. 2. All unused inputs and input/outputs must be held at V CCi or GND. Recommended Operating Conditions The Recommended Operating Conditions table defines the conditions for actual device operation. Recommended operating conditions are specified to ens ure optimal performance to the datasheet specifications. Fairchild does not recommend exceeding them or designing to Absolute Maximum Ratings. Symbol Parameter Conditions Min. Max. Unit VCC Power Supply Operating V CCA or VCCB 1.1 3.6 V Ports A and B 0 3.6 V VIN Input Voltage Control Input (/OE) 0 V CCA V TA Operating Temperature, Free Air -40 +85 °C dt/dV Minimum Input Edge Rate V CCA/B = 1.1 to 3.6V 10 ns/V
© 2009 Fairchild Semiconductor Corporation www.fairchildsemi.com FLXA108 • Rev. 1.0.0 5 FLXA108 — Low-Voltage Dual-Supply 8-Bit Voltage Translator Power-Up/Power-Down Sequence FXL translators offer an advantage in that either V CC may be powered up first. This benefit derives from the chip design. When either V CC is at 0V, outputs are in a high-impedance state. The control input (/OE) is designed to track the V CCA supply. A pull-up resistor tying /OE to V CCA 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. The recommended power-up sequence is: 1. Apply power to the first V CC. 2. Apply power to the second V CC. 3. Drive the /OE input LOW to enable the device. The recommended power-down sequence is: 1. Drive /OE input HIGH to disable the device. 2. Remove power from either V CC. 3. Remove power from other V CC.
© 2009 Fairchild Semiconductor Corporation www.fairchildsemi.com FLXA108 • Rev. 1.0.0 6 FLXA108 — Low-Voltage Dual-Supply 8-Bit Voltage Translator TA=-40 to 85°C. Symbol Parameter Conditions V CCA (V) V CCB (V) Min. Typ. Max. Units 2.70 to 3.60 2.00 2.30 to 2.70 1.60 1.65 to 2.30 .65xV CCA 1.40 to 1.65 .65xV CCA VIHA Data Inputs An Control Pin /OE 1.10 to 1.40 1.10 to 3.60 .90xVCCA V 2.70 to 3.60 2.00 2.30 to 2.70 1.60 1.65 to 2.30 .65xV CCB 1.40 to 1.65 .65xV CCB VIHB High-Level Input Voltage Data Inputs Bn 1.10 to 1.40 1.10 to 3.60 .90xVCCB V 2.70 to 3.60 .80 2.30 to 2.70 .70 1.65 to 2.30 .35xV CCA 1.40 to 1.65 .35xV CCA VILA Data Inputs An Control Pin /OE 1.10 to 1.40 1.10 to 3.60 .10xV CCA V 2.70 to 3.60 .80 2.30 to 2.70 .70 1.65 to 2.30 .35xV CCB 1.40 to 1.65 .35xV CCB VILB Low-Level Input Voltage Data Inputs Bn 1.10 to 1.40 1.10 to 3.60 .10xV CCB V VOHB High-Level Output V VOLB Low-Level Output V 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 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 II(HOLD) Bus-Hold Input Minimum Drive Current VIN=0.99V 1.10 1.10 -4.0 µA Continued on following page…
© 2009 Fairchild Semiconductor Corporation www.fairchildsemi.com FLXA108 • Rev. 1.0.0 7 FLXA108 — Low-Voltage Dual-Supply 8-Bit Voltage Translator TA=-40 to 85°C. Symbol Parameter Conditions V CCA (V) V CCB (V) Min. Max. Units 3.60 3.60 450.00 2.70 2.70 300.00 1.95 1.95 200.00 1.60 1.60 120.00 II(ODH) Bus-Hold Input Overdrive High Current (4) Data Inputs An, Bn 1.40 1.40 80.00 µA 3.60 3.60 -450.00 2.70 2.70 -300.00 1.95 1.95 -200.00 1.60 1.60 -120.00 II(ODL) Bus-Hold Input Overdrive Low Current (5) Data Inputs An, Bn 1.40 1.40 -80.00 µA II Input Leakage Current Control Inputs /OE, VI=VCCA or GND 1.10 to 3.60 3.60 ±1.0 µA An VO=0V to 3.6V 0 3.6 ±2.0 IOFF Power-Off Leakage Current Bn VO=0V to 3.6V 3.60 0 ±2.0 µA An, Bn VO=0V or 3.6V, An VO=0V or 3.6V, /OE=GND 3.60 0 ±5.0 IOZ 3-State Output Leakage Bn VO=0V or 3.6V, /OE=GND 0 3.60 ±5.0 µA ICCA/B VI=VCCI or GND; IO=0, ICCZ Quiescent Supply Current(6, 7) VI=VCCI or GND; IO=0, VI=VCCB or GND; IO=0 B-to-A Direction, /OE=GND 0 1.10 to 3.60 -10.0 ICCA VI=VCCA or GND; IO=0 A-to-B Direction 1.10 to 3.60 0 10.0 µA VI=VCCA or GND; IO=0, A-to-B Direction, /OE=GND 1.10 to 3.60 0 -10.0 ICCB Quiescent Supply Current VI=VCCB or GND; IO=0 B-to-A Direction 0 1.10 to 3.60 10.0 µA 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. V CCI is the VCC associated with the input side. 7. Reflects current per supply, V CCA or VCCB.
© 2009 Fairchild Semiconductor Corporation www.fairchildsemi.com FLXA108 • Rev. 1.0.0 8 FLXA108 — Low-Voltage Dual-Supply 8-Bit Voltage Translator Dynamic Output Electrical Characteristic A Port (An) Output Load: CL=15pF, RL ≥ MΩ (CI/O=4pF), TA=-40 to 85°C VCCA=3.0V to 3.6V VCCA=2.3V to 2.7V VCCA=1.65V to 1.95V VCCA=1.4V to 1.6V VCCA=1.1V to 1.3V Symbol Parameter Units trise Output Rise tfall Output Fall Time A Port (10) IOHD Dynamic Output Current High (9) IOLD Dynamic Output Current Low (10) B Port (Bn) Output Load: CL=15pF, RL ≥ MΩ (CI/O=5pF), 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 Symbol Parameter Units trise Output Rise tfall Output Fall Time B Port (10) IOHD Dynamic Output Current High (9) IOLD Dynamic Output Current Low (10) Notes: 8. Dynamic output characteristi cs are guaranteed, but not tested. 9. See Figure 7. 10. See Figure 8.
© 2009 Fairchild Semiconductor Corporation www.fairchildsemi.com FLXA108 • Rev. 1.0.0 9 FLXA108 — Low-Voltage Dual-Supply 8-Bit Voltage Translator AC Characteristics VCCA = 3.0V to 3.6V, 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 Symbol Parameter Units tPZL,tPZH /OE to A, tSKEW A Port, VCCA = 2.3V to 2.7V, 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 Symbol Parameter Units tPZL,tPZH /OE to A, tSKEW A Port, VCCA = 1.65V to 1.95V, 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 Symbol Parameter Units tPZL,tPZH /OE to A, tSKEW A Port, 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 www.fairchildsemi.com FLXA108 • Rev. 1.0.0 10 FLXA108 — Low-Voltage Dual-Supply 8-Bit Voltage Translator AC Characteristics (Continued) VCCA = 1.4V to 1.6V, 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 Symbol Parameter Units tPZL,tPZH /OE to A, tSKEW A Port, VCCA = 1.1V to 1.3V, 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 Symbol Parameter Units 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 www.fairchildsemi.com FLXA108 • Rev. 1.0.0 11 FLXA108 — Low-Voltage Dual-Supply 8-Bit Voltage Translator Maximum Data Rate(13, 14) 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 VCCA Units 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 40 40 40 40 40 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 TA=+25°C Typical Units CIN Input Capacitance Control Pin (/OE) V CCA=VCCB=GND 3 pF An 4 CI/O Input/Output Capacitance Bn VCCA=VCCB=3.3V, /OE=VCCA pF Cpd Power Dissipation Capacitance V CCA=VCCB=3.3V, VI=0V or VCC, f=10MHz 25 pF
Figure 11. 20-Terminal DQFN 2.5mm x 4.5mm Package the warranty therein, which covers Fairchild products.
© 2009 Fairchild Semiconductor Corporation www.fairchildsemi.com FLXA108 • Rev. 1.0.0 16 FLXA108 — Low-Voltage Dual-Supply 8-Bit Voltage Translator