Epson Real Time Clock (RTC) I2C Modules Part Number System

Here is a breakdown for the part numbers.

Example Part Number: RA-8581SA:B0:PURE SN

Note - *Automotive
Series: Package
RX-8564LC VSOJ 12 PIN
RX-8571LC -
RX-8731LC -
RA-8581SA* SOP 14 PIN Discontinued
RA-8565SA* -
RX-8025SA -
RX-8571SA -
RA4803SA* -
RA8803SA* -
RX8900SA -
RA8900SA* -
RX-8581JE VSOJ 20 PIN Discontinued
RTC-8564JE -
RX-8581SA SON 14 PIN Discontinued
RTC-8564NB SON 22 PIN
RX-8025NB -
RX-8571NB -
RX-8581NB - Discontinued
RX8010SJ SOP 8 PIN
RX8900CE 3.2x2.5mm, 10 Pin Ceramic
RA8900CE* -

Frequency Tolerance:

RA-8581SA* B=5±23PPM Discontinued
RTC-8564JE -
RTC-8564NB -
RX8010SJ -
RA-8565SA* -
RX-8564LC -
RX-8571SA -
RX-8571NB -
RX-8571LC -
RX-8581SA -
RX-8731LC -
RX-8581JE - Discontinued
RX-8581NB - Discontinued
RX4803SA AA, UA, UB, UC
RA4803SA* -
RX8803SA -
RX8900SA UA, UB, or UC
RA8900SA* -
RX8900CE -
RA8900CE* -

Tolerance Options:

B = 5±23PPM
AA = 5±5PPM +25℃
UA = ±3.4PPM -40℃ to +85℃
UB = ±5PPM -40℃ to +85℃
UC = ±5PPM -30℃ to +70℃

Tape & Reel Qty:

B: Bulk
0: 1000 pcs. per reel
3: 250 pcs. per reel

PURE SN:

CE Package Blank
RX8010SJ: PURE SN
RA4803SA: PURE SN
RX8803SA: PURE SN
RX8900SA: PURE SN
RTC-8564JE: ROHS
RTC-8564NB: ROHS or PURE SN
RA-8581SA: ROHS or PURE SN Discontinued
Summary
SER4053TR-ND RX8900CE:UA3
SER3649TR-ND RTC-8564NB:B3 ROHS
SER4055TR-ND RX8900SA:UA3 PURE SN
SER3252TR-ND RTC-8564JE:B3:ROHS
SER4056TR-ND RX8900SA:UB3 PURE SN
114-RX8900CE:UA0TR-ND RX8900CE:UA0
114-RX8900CE:UB0TR-ND RX8900CE:UB0
114-RX8900SA:UB0PURESNTR-ND RX8900SA:UB0 PURE SN
SER4054TR-ND RX8900SA:UC3 PURE SN
114-RX8900SA:UA0PURESNTR-ND RX8900SA:UA0 PURE SN
RX8010SJ:B3PURESN-ND RX8010SJ:B3 PURE SN
RTC-8564JE:B0ROHS-ND RTC-8564JE:B0 ROHS
RX8900CE:UBB-ND RX8900CE:UBB
114-RTC-8564NBB0ROHSTR-ND RTC-8564NBB0 ROHS
RTC-8564JE:ROHS-ND RTC-8564JE:ROHS
RX8900CE:UB6-ND RX8900CE:UB6
RX8900CE:UAB-ND RX8900CE:UAB
RTC-8564JE:BBROHS-ND RTC-8564JE:BB ROHS
RX8900SA:UC0PURESN-ND RX8900SA:UC0 PURE SN
RX8010SJ:BBPURESN-ND RX8010SJ:BB PURE SN
RX8900CE:UB3-ND RX8900CE:UB3
RTC-8564JE0:ROHS-ND RTC-8564JE0:ROHS
RX8900SA:UBBPURESN-ND RX8900SA:UBB PURE SN
RX8900SA:UCBPURESN-ND RX8900SA:UCB PURE SN
RX8900SA:UABPURESN-ND RX8900SA:UAB PURE SN
RTC-8564NB:BBROHS-ND RTC-8564NB:BB ROHS
SE3252TR-ND RTC-8564JE:3
114-RA8900CEUB3TR-ND RA8900CE UB3
114-RX-8025SA:AC0TR-ND RX-8025SA:AC0
SER3782TR-ND RX-8571SA:B3 PURE SN
SER3650TR-ND RX-8025SA:AA3
114-RX-8571SA:B0PURESNTR-ND RX-8571SA:B0 PURE SN
RX-8025SA:AAPURESN-ND RX-8025SA:AA PURE SN
114-RX-8025SA:AA0:ROHSTR-ND RX-8025SA:AA0:ROHS
RA-8565SA:B3PURESN-ND RA-8565SA:B3 PURE SN
RX-8571SA:BPURESN-ND RX-8571SA:B PURE SN
RX-8025SA:ACPURESN-ND RX-8025SA:AC PURE SN
RX-8025SA:AA3:PURESN-ND RX-8025SA:AA3:PURE SN
RX-8025SA:AA0:PURESN-ND RX-8025SA:AA0:PURE SN
RA-8565SA:BPURESN-ND RA-8565SA:B PURE SN
RA-8565SA:B0PURESN-ND RA-8565SA:B0 PURE SN
RX-8025SA:AC3PURESN-ND RX-8025SA:AC3 PURE SN
RX-8025SA:AA:ROHS-ND RX-8025SA:AA:ROHS
SER3762TR-ND RA-8565SA:B3 ROHS
114-RX-8025SA:AA0TR-ND RX-8025SA:AA0
114-RX-8025SA:AA-ND RX-8025SA:AA
114-RX-8564LCBPURESN-ND RX-8564LCB PURE SN
SER4316TR-ND RX-8564LC:B0 PURE SN
SER3779TR-ND RX-8564LC:B3 PURE SN
SER3780TR-ND RX-8571LC:B3 PURE SN
114-RX-8571LCB0PURESNTR-ND RX-8571LCB0 PURE SN
SER3782TR-ND RX-8571SA:B3 PURE SN
SER4316TR-ND RX-8564LC:B0 PURE SN
SER3779TR-ND RX-8564LC:B3 PURE SN
114-RX-8571SA:B0PURESNTR-ND RX-8571SA:B0 PURE SN
SER4049TR-ND RX-8581NB:B3
SER3784TR-ND RX-8581NB:B3 PURE SN
RX-8731LC:BPURESN-ND RX-8731LC:B PURE SN
RA-8565SA:B3PURESN-ND RA-8565SA:B3 PURE SN
RX-8581NB:BPURESN-ND RX-8581NB:B PURE SN
SE3253-ND RX-8581SA:B
RX-8581NB:BI2C-BUS-ND RX-8581NB:B I2C-BUS
RX-8571SA:BPURESN-ND RX-8571SA:B PURE SN
RX-8581JE:B0I2C-BUS-ND RX-8581JE:B0 I2C-BUS
RX-8731LC:B0PURESN-ND RX-8731LC:B0 PURE SN
RX-8581SA:B0-ND RX-8581SA:B0
RX-8581JE:BI2C-BUS-ND RX-8581JE:B I2C-BUS
SER3781TR-ND RX-8571NB:B3PURESN
SER3783TR-ND RX-8581JE:B3 I2C-BUS
RX-8581SA:B0:PURESN-ND RX-8581SA:B0:PURE SN
RX-8581NB:B0-ND RX-8581NB:B0
RX-8731LC:B-ND RX-8731LC:B
RX-8731LC:B3-ND RX-8731LC:B3
RX-8581JE:B0-ND RX-8581JE:B0
RA-8565SA:BPURESN-ND RA-8565SA:B PURE SN
RA-8565SA:B0PURESN-ND RA-8565SA:B0 PURE SN
SER3253TR-ND RX-8581SA:B3:ROHS
SER4433-ND RX-8581SA:B:PURE SN
SER4424TR-ND RX-8581SA:B3:PURE SN
SER3786TR-ND RX-8731LC:B3 PURE SN
SER3762TR-ND RA-8565SA:B3 ROHS
SE3253-ND RX-8581SA:B
RX-8581SA:B0:PURESN-ND RX-8581SA:B0:PURE SN
RX-8581SA:B0-ND RX-8581SA:B0
SER3253TR-ND RX-8581SA:B3:ROHS
SER4433-ND RX-8581SA:B:PURE SN
SER4424TR-ND RX-8581SA:B3:PURE SN
SER4316TR-ND RX-8564LC:B0 PURE SN
SER3779TR-ND RX-8564LC:B3 PURE SN