SNAA410 July   2024 CDCDB2000 , LMKDB1108 , LMKDB1120 , LMKDB1204

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1 Introduction
  5. 2 RC19020 vs. LMKDB1120 Comparison
    1. 2.1 RC19020 vs. LMKDB1120 Pin Comparison
    2. 2.2 RC19020 vs. LMKDB1120 Exposed Registers Comparison
  6. 3 9QXL2001B vs. LMKDB1120 Comparison
    1. 3.1 9QXL2001B vs. LMKDB1120 Pin Comparison
    2. 3.2 9QXL2001B vs. LMKDB1120 Exposed Register Comparison
  7. 4 9QXL2001C vs. LMKDB1120 Comparison
    1. 4.1 9QXL2001C vs. LMKDB1120 Pin Comparison
    2. 4.2 9QXL2001C vs. LMKDB1120 Exposed Registers Comparison
  8. 5 CDCDB2000 vs. LMKDB1120 Comparison
  9. 6 RC19008 vs. LMKDB1108 Comparison
    1. 6.1 RC19008 vs. LMKDB1108 Pin Comparison
    2. 6.2 RC19008 vs. LMKDB1108 Exposed Registers Comparison
  10. 7 RC19004 vs. LMKDB1104 Comparison
    1. 7.1 RC19004 vs. LMKDB1104 Pin Comparison
    2. 7.2 RC19004 vs. LMKDB1104 Exposed Register Comparison
  11. 8 RC19204 vs. LMKDB1204 Comparison
    1. 8.1 RC19204 vs. LMKDB1204 Pin Comparison
    2. 8.2 RC19204 vs. LMKDB1204 Exposed Register Comparison
  12. 9 RC19202 vs. LMKDB1202 Comparison
    1. 9.1 RC19202 vs. LMKDB1202 Pin Comparison
    2. 9.2 RC19202 vs. LMKDB1202 Exposed Registers Comparison
  13. 10RC19002 vs. LMKDB1102 Comparison
    1. 10.1 RC19002 vs. LMKDB1102 Pin Comparison
    2. 10.2 RC19002 vs. LMKDB1102 Exposed Registers Comparison
  14. 11Summary
  15. 12References

8.1 RC19204 vs. LMKDB1204 Pin Comparison

To summarize, when replacing the RC19204 with the LMKDB1204, do not leave the vPWRGD/PWRDN# pin (1) floating and depend on the internal pulldown resistor on the LMKDB1204. Instead, drive pin 1 low or high through external controllers, or pull pin 1 low or high through external resistors.

PIN Pin Differences between RC19204 and LMKDB1204 that Affect Drop-In Replacements Design Requirements when Replacing the RC19204 with the LMKDB1204
TI NAME RENESAS NAME NO. TYPE
Input
CLKIN0_P CLKIN0 2 I No difference N/A
CLKIN0_N CLKINb0 3 I
CLKIN1_P CLKIN1 5 I
CLKIN1_N CLKINb1 6 I
Output and Output Enable
CLK3_P CLK12 10 O No difference N/A.
CLK3_N CLKb12 11 O
CLK2_P CLK10 13 O
CLK2_N CLKb10 14 O
CLK1_P CLK5 20 O
CLK1_N CLKb5 21 O
CLK0_P CLK3 23 O
CLK0_N CLKb3 24 O
^OE3#/SMB_CLK OEb_G 9 I Completing a drop-in replacement does not require any changes on these pins. This pin is active low OE for both the RC19204 and the LMKDB1204. The LMKDB1204 offers an additional SMBus functionality. When SMBus is enabled, this pin serves as the SMBus clock. N/A.
^OE2# OEb_F 16 I No difference N/A.
^OE1# OEb_C 19 I
^OE0# OEb_B 25 I
Power
VDD_IN0 VDDIN0 4 P No difference No changes are required. Keep the same power filtering used for the RC19204.
VDD_IN1 VDDINI1 7 P
VDD_BANK1 VDDCLK_1 12 P
VDD_BANK0 VDDCLK_0 22 P
VDD_DIG VDDDIG 26 P
VDDA VDDA 18 P
Miscellaneous
vPWRGD/PWRDN# PWRGD_PWRDNb 1 I RC19204 has an internal pullup resistor while LMKDB1204 has an internal pulldown resistor. TI followed DB2000QL’s definition as a guideline which states that the PWRGD/PWRDN# pin needs to have an internal pulldown resistor. Do not leave this pin floating and depend on the internal resistor. Drive pin low or high through external controllers, or pull pin low or high through external resistors.
^vCLKIN_SEL_tri/SMB_DATA CLKSEL_tri 8 I Completing a drop-in replacement does not require any changes on these pins. This pin is the CLKIN_SEL_tri for both the RC19204 and the LMKDB1204. The LMKDB1204 offers an additional SMBus functionality. When SMBus is enabled, this pin serves as the SMBus data. N/A.
vSMB_EN DNC 15 I Completing a drop-in replacement does not require any changes on these pins. These pins are NC for both the RC19204 and the LMKDB1204 and can be left floating. LMKDB1204 offers an additional SMBus functionality. This pin has an internal pulldown resistor that disables SMBus by default. N/A.
LOS# LOSb 17 O No difference
GND GNDSUB 27 G
vZOUT_SEL ZOUTSEL 28 I
GND EPAD DAP/29 G