CM2030 Datasheet, PDF (7/17 Pages) California Micro Devices Corp – HDMI Transmitter Port Protection and Interface Device

CM2030
The CM2030’s bi-directional slew rate limiting is integrated into the CEC level-shifter functionality thus allowing
the designer to directly interface a simple low voltage CMOS GPIO directly to the CEC bus and simultaneously
guarantee meeting all CEC output logic levels and HDMI slew-rate and isolation specifications (See Figure 5).
CEC
CEC I/F
µP
CM2030
Figure 5. Integrated CM2030 Solution
The CM2030 also includes an internal backdrive protected static pullup 120µA current source from the
CE_SUPPLY rail in addition to the dynamic slew rate control circuitry.
Figure 6 shows a typical shaped CM2030 CEC output (bottom) against a ringing uncontrolled discrete solution
(top).
Figure 6. CM2030 CEC Output
Rev. 5 | Page 7 of 17 | www.onsemi.com