I2C I/O Pad Set

The I2C libraries provide the bidirectional I/O for two-line serial communication per Rev. 4 of the I2Cbus industry specification. The design is compatible with Standard-mode, Fast-mode, and Highspeed mode I 2C operating modes.

• I2C Bi-directional Driver Features
  • Supported I2C operating modes:
    • Standard-mode (Sm) – 100 Kbps data rate
    • Fast mode (Fm) – 400 Kbps data rate
    • Fast mode (Fm+) – 1.0 Mbps data rate
    • High-speed mode (Hs) - 3.4 Mbps data rate
  • Open drain operation only
  • Built-in output slew rate control to meet I2C Tof minimum of (20 x VDDP/5.5V) ns
  • Output enable and mode select
  • Receiver enable
  • ESD protection is accomplished with an SCR (no diode to the positive power supply)
  • Standard LVCMOS compatible input with optional Schmitt trigger (hysteresis)
  • Power-on sequencing independent design with Power-On Control
  • DVDD = 1.62V to 1.98V
  • Pad VDDP = 1.62V to 1.98V – independent of DVDD
  • The circuit consumes no DC supply current in the static state
  • Fault-tolerant to 1.98V at PAD (no current flow when DVDD = 0V)
• An open-drain design, this cell requires an external pull-up resistor to a high voltage power supply. Designed for a 1.8V I2C bus application, VDDP can track DVDD but it is not necessary. The sizing of the external resistor or appropriate pull-up network is application dependent.

• Physical abstract in LEF format (.lef)
• Timing models in Synopsys Liberty formats (.lib and .db)
• Calibre compatible LVS netlist in CDL format (.cdl)
• GDSII stream (.gds)
• Behavioral Verilog (.v)
• Layout Parasitic Extraction (LPE) SPICE netlist (.spice)
• Databook (.pdf)
• Library User Guide - ESD Guidelines (.pdf)