SNAA410 July   2024 CDCDB2000 , LMKDB1102 , LMKDB1104 , LMKDB1108 , LMKDB1120 , LMKDB1202 , 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

10.1 RC19002 vs. LMKDB1102 Pin Comparison

To summarize, when replacing the RC19002 with the LMKDB1102:

  • OE1# pin (15) needs to receive a certain slew rate to certify the part behaves as expected (≥ 0.1V/ns). To do that, pin 15 cannot see a resistance higher than 1kΩ. Make sure the internal resistance of the component driving the LMKDB1102 and any other series resistance are below 1kΩ.
  • Do not leave pin 7 (GND) floating. Tie this pin to GND.
PIN Pin Differences between RC19002 and LMKDB1102 that Affect Drop-In Replacements Design Requirements when Replacing the RC19002 with the LMKDB1102
TI NAME RENESAS NAME NO. TYPE
Input
CLKIN_P CLKIN0 1 I No difference N/A
CLKIN_N CLKINb0 2 I
Output and Output Enable
CLK2_P CLK10 9 O No difference N/A
CLK2_N CLKb10 10 O
CLK1_P CLK5 16 O
CLK1_N CLKb5 17 O
^OE2# OEb10 12 I
^OE1# OEb5 15 I This pin needs to receive a certain slew rate to certify the part behaves as expected (≥ 0.1V/ns). To do that, this pin cannot see a resistance higher than 1kΩ. Renesas does not mention this pin having this requirement in the RC19002 data sheet, so TI assumed this as a difference between the RC19002 and the LMKDB1102. Make sure the internal resistance of the component driving the LMKDB1102 and any other series resistance on this pin are ≤ 1kΩ. In most applications, slew rate requirements are generally met and this is not an issue.
Power
VDDA VDDCLK/DNC 6 P Completing a drop-in replacement does not require any changes on this pin. The RC19002 pin is both a NC pin and a power supply pin while the LMKDB1102 pin is only a power supply pin. TI recommends to connect this pin to VDD. This recommendation can be disregarded for drop-in replacements. No changes are required. Keep the same power filtering used for the RC19002.
VDD VDDCLK 3 P No difference
VDD VDDCLK 8 P
VDD VDDCLK 14 P
VDD VDDCLK 18 P
VDD VDDDIG 19 P
Miscellaneous
NC NC 4 I No difference N/A.
NC NC 5 I
GND GND/DNC 7 I or G

This pin on the RC19002 is both a NC pin and a GND pin so the pin can either be left floating or connected to GND while this pin on the LMKDB1102 is only a GND pin. TI is unable to tie this pin to DAP/GND inside the package without causing any reliability concerns.

 Do not leave this pin floating. Tie this pin to GND.
vZOUT_SEL ZOUTSEL 11 I No difference N/A.
LOS# LOSb 13 O
GND GNDSUB 20 G
GND EPAD DAP/21 G