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

7.1 RC19004 vs. LMKDB1104 Pin Comparison

To summarize, when replacing the RC19004 with the LMKDB1104:

  • When SBI is enabled, do not leave any SBI pins floating and depend on the internal pulldown resistors of these pins of the LMKDB1104. Instead, drive SBI pins low or high through external controllers, or pull SBI pins low or high through external resistors.
  • Do not leave the vPWRGD/PWRDN# pin (9) floating and depend on the internal pulldown resistor on the LMKDB1104. Instead, drive pin 9 low or high through external controllers, or pull pin 9 low or high through external resistors.
PIN Pin Differences between RC19004 and LMKDB1104 that Affect Drop-In Replacements Design Requirements when Replacing the RC19004 with the LMKDB1104
TI NAME RENESAS NAME NO. TYPE
Input
CLKIN_P CLKIN 6 I No difference N/A
CLKIN_N CLKINb 7 I
Output and Output Enable
CLK0_P CLK13 12 O No difference N/A.
CLK0_N CLKb13 13 O
CLK1_P CLK9 16 O
CLK1_N CLKb9 17 O
CLK2_P CLK5 19 O
CLK2_N CLKb5 20 O
CLK3_P CLK2 23 O
CLK3_N CLKb2 24 O
vOE0#/SHFT_LD# OEb13_SHFT_LDb 11 I OE mode SBI mode OE mode SBI mode
No difference

RC19004 has an internal pullup resistor while LMKDB1104 has an internal pulldown resistor. TI decided to follow DB2000QL’s definition as a guideline which states that the OE pins require internal pulldown resistors.

 N/A. Do not leave these pin floating and depend on the internal resistors. Drive SBI pins low or high through external controllers, or pull SBI pins low or high through external resistors.
vOE1#/SBI_IN OEb9_SBI_IN 14 I
vOE2#/SBI_CLK OEb5_SBI_CLK 21 I
vOE3#/SBI_OUT OEb2_SBI_OUT 22 I No difference

N/A.
Power
VDDA VDDDIG 5 P Completing a drop-in replacement does not require any changes on this pin. The input receiver power supply pin name and function are different between the RC19004 and the LMKDB1104. TI decided to follow DB2000QL’s definition for naming the input receiver power supply pin as VDDA. No changes are required. Keep the same power filtering used for the RC19004.
VDD VDDCLK 10 P No difference
VDD VDDCLK 15 P
VDD VDDCLK 18 P
VDD VDDCLK 25 P
Miscellaneous
^vSADR1_tri SADR_tri1 1 I No difference N/A.
^vSADR0_tri SADR_tri0 2 I
SMB_DATA SDATA 3 I/O
SMB_CLK SCLK 4 I
vSBI_EN SBI_ENQ 8 I
vPWRGD/PWRDN# PWRGD_PWRDNb 9 I RC19004 has an internal pullup resistor while LMKDB1104 has an internal pulldown resistor. TI followed DB2000QL’s definition as a guildeline 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.
NC NC 26 NC No difference N/A.
^SLEWRATE_SEL SLEWRATE_SEL 27 I
LOS# LOSb 28 O
GND EPAD DAP/29 G