Document
FXMAR2102 — Dual-Supply, 2-Bit Voltage Translator / Isolator for I2C Applications
October 2011
FXMAR2102
Dual-Supply, 2-Bit Voltage Translator / Isolator for I2C Applications
Features
Bi-Directional Interface between Any Two Levels:
1.65V to 5.5V
No Direction Control Needed Internal 10K Pull-Up Resistors System GPIO Resources Not Required when OE
Tied to VCCA
I2C-Bus® Isolation A/B Port VOL = 175mV (Typical), VIL = 150mV,
IOL = 6mA
Open-Drain Inputs / Outputs Works in Push Pull Environment Accommodates Standard-Mode and Fast-Mode
I2C-Bus Devices
Supports I2C Clock Stretching & Multi-Master Fully Configurable: Inputs and Outputs Track VCC Non-Preferential Power-Up; Either VCC Can
Power-Up First
Outputs Switch to 3-State if Either VCC is at GND Tolerant Output Enable: 5V Packaged in 8-Terminal Leadless MicroPak™
(1.6mm x 1.6mm) and Ultrathin MLP (1.2mm x 1.4mm)
ESD Protection Exceeds:
- B Port: 8kV HBM ESD (vs. GND & vs. VCCB) - All Pins: 4kV HBM ESD (per JESD22-A114) - 2kV CDM (per JESD22-C101)
Description
The FXMAR2102 is a high-performance configurable dual-voltage-supply translator for bi-directional voltage translation over a wide range of input and output voltages levels. The FXMAR2102 also works in a pushpull environment.
It is intended for use as a voltage translator between I2C-Bus® compliant masters and slaves. Internal 10KΩ pull-up resistors are provided.
The device is designed so the A port tracks the VCCA level and the B port tracks the VCCB level. This allows for bi-directional A/B-port voltage translation between any two levels from 1.65V to 5.5V. VCCA can equal VCCB from 1.65V to 5.5V. Either VCC can be powered-up first. Internal power-down control circuits place the device in 3-state if either VCC is removed.
The two ports of the device have automatic directionsense capability. Either port may sense an input signal and transfer it as an output signal to the other port.
Ordering Information
Part Number
FXMAR2102L8X FXMAR2102UMX
Operating Temperature Range
-40 to +85°C
Top Mark
BU
Package
8-Lead MicroPak™, 1.6mm Wide 8-Lead Ultrathin MLP, 1.2mm x 1.4mm
Packing Method
5000 Units on Tape and Reel
© 2010 Fairchild Semiconductor Corporation FXMAR2102 • Rev. 0.0.7
www.fairchildsemi.com
FXMAR2102 — Dual-Supply, 2-Bit Voltage Translator / Isolator for I2C Applications
Block Diagram
OE
Internal Direction Generator & Ctrl
VCCB
Dynamic Driver (with Time Out)
10K
VbiasA A
VCCA
10K
VbiasB
Dynamic Driver (with Time Out)
Internal Direction Generator & Ctrl
Figure 1. Block Diagram, 1 of 2 Channels
B
© 2011 Fairchild Semiconductor Corporation FXMAR2102 • Rev. 1.0.0
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www.fairchildsemi.com
FXMAR2102 — Dual-Supply, 2-Bit Voltage Translator / Isolator for I2C Applications
Pin Configuration
B0 B1 OE
7 65
VCCB 8
4 GND
1 23
VCCA A0 A1
Figure 2. MicroPak™ (Top-Through View)
Figure 3. UMLP (Top-Through View)
Pin Definitions
Pin #
1 2, 3
4 5 6, 7 8
Name
VCCA A0, A1 GND
OE B1, B0 VCCB
Description
A-Side Power Supply A-Side Inputs or 3-State Outputs Ground Output Enable Input B-Side Inputs or 3-State Outputs B-Side Power Supply
Truth Table
Control OE(1)
Outputs
LOW Logic Level HIGH Logic Level
3-State Normal Operation
Note: 1. If the OE pin is driven LOW, the FXMAR2102 is disabled and the A0, A1, B0, and B1 pins (including dynamic drivers)
are forced into 3-state and all four 10K internal pull-up resisters are decoupled from their respective VCC.
© 2011 Fairchild Semiconductor Corporation FXMAR2102 • Rev. 1.0.0
3
www.fairchildsemi.com
FXMAR2102 — Dual-Supply, 2-Bit Voltage Translator / Isolator for I2C Applications
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
VCCA, VCCB Supply Voltage VIN DC Input Voltage
VO Output Voltage(2)
Parameter
A Port B Port Control Input (OE) An Outputs 3-State Bn Outputs 3-State An Outputs Active
Bn Outputs Active
IIK IOK IOH / IOL ICC PD TSTG
ESD
DC Input Diode Current At VIN < 0V DC Output Diode Current At VO < 0V
At VO > VCC DC Output Source/Sink Current
DC VCC or Ground Current per Supply Pin
Power Dissipation
At 400KHz
Storage Temperature Range
Human Body Model, B-Port Pins
Electrostatic Discharge Human Body Model, All Pins
Capability
(JESD22-A114)
Charged Device Mode, JESD22-C101
Note: 2. IO absolute maximum rating must be observed.
Min.
–0.5 –0.5 –0.5 –0.5 –0.5 –0.5 –0.5 –0.5
–50
–65
Max.
7.0 7.0 7.0 7.0 7.0 7.0 VCCA + 0.5V VCCB + 0.5V –50 –50 +50 +50 ±100 0.129 +150 8
4
2
Units
V
V
mA mA mA mA mW °C
kV
Recommended Operating Conditions
The Recommended Operating Conditions table defines the conditions for actual device oper.