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Features
SPI, MICROWIRE, and I 2C Level Translation Low-Voltage ASIC Level Translation Smart Card Readers Cell-phone Cradles Portable POS Systems Portable Communication Devices Low-Cost Serial Interfaces Cell-Phones GPS Telecommunications Equipment Consumer Electronics Household Appliances Provides bidirectional voltage translation with no direction pin Less than 1.5 ns maximum propagation delay Low 3.5 Ω ON-state connection between input and output ports provides less signal distortion 5V tolerant I/O ports to support mixed-mode signal operation High-impedance A and B pins for EN = LOW Latch up free operation Flow through pinout for ease of printed-circuit board trace routing ESD protection exceeds: 4kV HBM per JESD22-A114 Package offered: SOT363 P i n C o n f i g u r a t i o n s T o p V i e w (Top View) M: Month Code UM3211P SOT363
http://www.union-ic.com Rev.01 Dec.2013 2 / 1 0 UM3211P Pin Description Pin Number Symbol Function
1 A Low-voltage side; connected to VCCA through a pull-up
2 VCCA Low-voltage side re ference supply voltage for A
3 GND Ground (0V)
4 EN Switch enable input; connected to VCCB and pulled-up
5 VCCB High-voltage side re ference supply voltage for B
6 B High-voltage side; connected to VCCB through a pull-up
Ordering Information
Part Number Packaging Type Marking Code Shipping Qty UM3211P SOT363 UA3 3000pcs/7Inch Tape & Reel Absolute Maximum Ratings (Note 1) Over operating free-air temperature range (unless otherwise noted) Symbol Parameter Value Unit VCCA Reference Voltage (A) -0.5 to +6 V VCCB Reference Voltage (B) -0.5 to +6 V VI Input Voltage -0.5(Note 2) to +6 V VI/O Voltage on an input/output pin -0.5(Note 2) to +6 V Ich Channel Current (DC) +128 mA IIK Input Clamp Current VI＜0V -50 mA Tstg Storage Temperature -65 to +150 °C Note 1: Stresses beyond those listed under "a bsolute maximum ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. Note 2: The input and input/output negative volta ge ratings may be exceeded if the input and input/output clamp current ratings are observed.
http://www.union-ic.com Rev.01 Dec.2013 3 / 1 0 UM3211P Recommended Operating Conditions Symbol Parameter Conditions Min Max Unit VI/O Voltage on an input/output pin A, B 0 5.5 V VCCA (Note 3) Reference Voltage (A) VCCA 0 5.5 V VCCB (Note 3) Reference Voltage (B) VCCB 0 5.5 V VI(EN) Input Voltage on pin EN 0 5.5 V Isw(pass) Pass Switch Current 64 mA Tamb Ambient Temperature Operating in free-air -40 +85 °C Note 3: VCCA ≤ VCCB −1 V for best results in level shifting applications.
Electrical Characteristics
Tamb = −40 °C to +85 °C, unless otherwise specified. Symbol Parameter Conditions Min Typ (Note 4) Max Unit VIK Input Clamping V oltage II = −18mA; VI(EN) = 0V - 1 . 2 V IIH HIGH-level Input Current VI= 5V; VI(EN) = 0V 5 uA Ci(EN) Input Capacitance on pin EN VI= 0V or 3V 12 pF Cio(off) Off-state input/output capacitance A, B; VO= 0V or 3V ; VI(EN) = 0V 10 12 pF Cio(on) On-state input/output capacitance A, B; VO= 0V or 3V ; VI(EN) = 3V 8 12.5 (Note 5) pF Ron ON-state resistance (Note 6) A, B; VI = 0V; IO = 64mA; VI(EN) = 4.5V(Note 7) 1 2.5 5.0 Ω A, B; VI = 2.4V; IO = 15mA; VI(EN) = 4.5V 4.5 7.5 Note 4: All typical values are at Tamb = 25°C. Note 5: Not production tested, maximum value based on characterization data of typical parts. Note 6: Measured by the voltage drop between the A and B terminals at the indicated current through the switch. ON-state resistance is de termined by the lowest voltage of the two terminals. Note 7: Guaranteed by design.
http://www.union-ic.com Rev.01 Dec.2013 4 / 1 0 UM3211P Switching Characteristics (translating down) Over recommended operating free-air temperature range(unless otherwise noted). Values guaranteed by design. Symbol Parameter Test Conditions CL=50pF CL=30pF CL=15pF UnitMin Max Min Max Min Max VI(EN) = 3.3V; VIH = 3.3V; VIL = 0V; VM =1.15V(see Figure 1). tPLH LOW to HIGH propagation delay from (input) B to (output) A 0 3.5 0 2.7 0 2.2 ns tPHL HIGH to LOW propagation delay 0 3.5 0 3.0 0 2.3 ns VI(EN) =2.5V; VIH = 2.5V; VIL = 0V; VM = 0.75V (see Figure 1). tPLH LOW to HIGH propagation delay from (input) B to (output) A 0 3.5 0 2.7 0 2.2 ns tPHL HIGH to LOW propagation delay 0 4.0 0 3.0 0 2.3 ns Switching Characteristics (translating up) Over recommended operating free-air temperature range(unless otherwise noted). Values guaranteed by design. Symbol Parameter Test Conditions CL=50pF CL=30pF CL=15pF UnitMin Max Min Max Min Max tPLH LOW to HIGH propagation delay from (input) A to (output) 0 3.35 0 2.5 0 2.0 ns tPHL HIGH to LOW propagation delay 0 4.35 0 3.25 0 2.4 ns tPLH LOW to HIGH propagation delay from (input) A to (output) 0 3.35 0 2.5 0 2.0 ns tPHL HIGH to LOW propagation delay 0 4.5 0 3.5 0 2.5 ns
http://www.union-ic.com Rev.01 Dec.2013 5 / 1 0 UM3211P Applications Information Detail Description The UM3211P is a bidirectional voltage level translator operational from 1.0V to 3.6V (VCCA) and 1.8V to 5.5V (V CCB), which allows bidirectional voltage translations between 1.0V and 5V without the need for a direction pin in open-drain or push-pull applications. When the A or B port is LOW, the clamp is in the ON-state and a low resistance connection exists between the A and B ports. The low ON-state resistance (R on) of the switch allows connections to be made with minimal propagation delay. Assumi ng the higher voltage is on the B port when the B port is HIGH, the voltage on the A port is limited to the voltage set by V CCA. When the A port is HIGH, the B port is pulled to the drain pull-up supply voltage (V pu(D)) by the pull-up resistors. This functionality allows a seamless translation between higher and lower voltages selected by the user without the need for directional control. When EN is HIGH, the translator switch is on, a nd the A I/O is connected to the B I/O, allowing bidirectional data flow between ports. When EN is LOW, the translator switch is off, and a high-impedance state exists between ports. The EN input circuit is designed to be supplied by VCCB. To ensure the high-impedance state during power-up or power-down, EN must be LOW. All channels have the same electrical characteristics and there is minimal deviation from one output to another in voltage or propagation delay. This is a benefit over discrete transistor voltage translation solutions, since the fabrication of the switch is symmetrical.
http://www.union-ic.com Rev.01 Dec.2013 6 / 1 0 UM3211P Enable and Disable Vcc I2C-BUS MASTER I/O GND UM3211P SW GND RPU A VCCA VCCA=1.8V(1) Vcc I2C-BUS DEVICE I/O GND EN VCCB 200kΩ RPU B Vpu(D)=3.3V(1) (1) The applied voltages at VCCA and Vpu(D) should be such that VCCB is at least 1 V higher than VCCA for best translator operation. Fig 2. Typical application circuit (switch always enabled) Vcc I2C-BUS MASTER I/O GND UM3211P SW GND RPU A VCCA VCCA=1.8V(1) Vcc I2C-BUS DEVICE I/O GND EN VCCB 200kΩ RPU B Vpu(D)=3.3V(1) (1) In the Enabled mode, the applied enable voltage VI(EN) and the applied voltage at VCCA should be such that VCCB is at least 1 V higher than VCCA for best translator operation. Fig 3. Typical application circuit (switch enable control) on off 3.3V enable signal(1)
http://www.union-ic.com Rev.01 Dec.2013 7 / 1 0 UM3211P Bidirectional translation For the bidirectional clamping configuration (highe r voltage to lower voltage or lower voltage to higher voltage), the EN input must be connect ed to VCCB and both pins pulled to HIGH side Vpu(D) through a pull-up resistor (typically 200k Ω). This allows VCCB to regulate the EN input. A filter capacitor on VCCB is recommended. The master output driver can be totem pole or open-drain (pull-up resistors may be required) and the slave device output can be totem pole or open-drain (pull-up resistors are required to pull the B output to V pu(D)). However, if either output is totem pole, data must be unidirectional or th e outputs must be 3-stateable and be controlled by some direction-control mechanism to prevent HIGH -to-LOW contentions in either direction. If both outputs are open-drain, no direction control is needed. The reference supply voltage (V CCA) is connected to the processor core power supply voltage. When VCCB is connected through a 200k Ω resistor to a 3.3V to 5.5V V pu(D) power supply, and VCCA is set between 1.0V and (V pu(D) −1V), the output of A has a maximum output voltage equal to VCCA, and the output of B has a maximum output voltage equal to Vpu(D). Application operating conditions Refer to Figure 2 Symbol Parameter Conditions Min Typ (Note 8) Max Unit VCCB Reference Voltage (B) V CCA + 0.6 2.1 5 V VI(EN) Input Voltage on pin EN V CCA + 0.6 2.1 5 V VCCA Reference Voltage (A) 0 1.5 4.4 V Isw(pass) Pass Switch Current 14 mA Iref Reference Current Transistor 5 μA Tamb Ambient Temperature Operating in free-air -40 +85 °C Note 8: All typical values are at Tamb = 25 °C. Sizing pull-up resistor The pull-up resistor value needs to limit the current through the pass transistor when it is in the ON state to about 15mA. This ensures a pass volta ge of 260mV to 350mV. If the current through the pass transistor is higher than 15mA, the pass voltage also is high er in the ON state. To set the current through each pass transistor at 15mA, the pull-up resistor value is calculated as: A VVR Dpu PU 015.0 35.0)( The table below summarizes resistor reference voltages and currents at 15mA, 10mA, and 3mA. The resistor values shown in the +10 % column or a larger value should be used to ensure that the pass voltage of the transistor would be 350 mV or l ess. The external driver must be able to sink the total current from the resistors on both sides of the UM3211P device at 0.175V, although the 15mA only applies to current flowing through the UM3211P device.
http://www.union-ic.com Rev.01 Dec.2013 8 / 1 0 UM3211P Pull-up resistor values Calculated for V OL = 0.35V; assumes output driver VOL = 0.175V at stated current. Vpu(D) Pull-up resistor value (Ω) 15mA 10mA 3mA Nominal +10 % (Note 9) Nominal +10 % (Note 9) Nominal +10 % (Note 9) 5V 310 341 465 512 1550 1705 3.3V 197 217 295 325 983 1082 2.5V 143 158 215 237 717 788 1.8V 97 106 145 160 483 532 1.5V 77 85 115 127 383 422 1.2V 57 63 85 94 283 312 Note 9: +10 % to compensate for VCC range and resistor tolerance.
http://www.union-ic.com Rev.01 Dec.2013 9 / 1 0 UM3211P
Package Information
A 0.900 1.100 0.035 0.043 A1 0.000 0.100 0.000 0.004 A2 0.900 1.000 0.036 0.039 b 0.100 0.350 0.004 0.014 c 0.080 0.220 0.003 0.009 D 1.800 2.200 0.071 0.087 E 1.150 1.350 0.045 0.053 E1 2.000 2.450 0.079 0.096 e 0.650REF 0.026REF e1 1.200 1.400 0.047 0.055 L 0.525REF 0.021REF L1 0.260 0.460 0.010 0.018 θ 0° 8° 0° 8° Land Pattern NOTES: 1. Compound dimension: 2.10×1.25; 2. Unit: mm; 3.General tolerance ±0.05mm unless otherwise specified; 4. The layout is just for reference. Tape and Reel Orientation UA3
http://www.union-ic.com Rev.01 Dec.2013 1 0 / 1 0 UM3211P IMPORTANT NOTICE The information in this docum ent has been carefully review ed and is believed to be accurate. Nonetheless, this document is subjec t to change without notice. Union assumes no responsibility for any inaccuracies that may be contained in this document, and makes no commitment to update or to keep current the contained information, or to notify a person or organization of any update. Union rese rves the right to make changes, at any time, in order to improve reliability, function or design and to attempt to supply the best product possible. Union Semiconductor, Inc Add: 2F, No. 3, Lane 647 Songtao Road, Shanghai 201203 Tel: 021-51093966 Fax: 021-51026018 Website: www.union-ic.com