| Mfg |
Part # |
Datasheet |
Description |
 STMicroelectronics |
M4T28-BR12SH |
530Kb/34P |
5.0 OR 3.0V, 512 bit 64 x 8 SERIAL RTC and NVRAM SUPERVISOR |
| M4T28-BR12SH |
231Kb/29P |
Serial Real Time Clock with 56 Bytes of NVRAM |
| M4T28-BR12SH |
433Kb/31P |
512 Bit 64 bit x8 SERIAL RTC SPI SRAM |
| M4T28-BR12SH |
511Kb/29P |
3.3V-5V 256 Kbit 32Kb x8 TIMEKEEPER SRAM |
| M4T28-BR12SH |
51Kb/7P |
TIMEKEEPER SNAPHAT Battery & Crystal November 1999 |
| M4T28-BR12SH |
317Kb/36P |
5.0 V PC real-time clock |
| M4T28-BR12SH |
328Kb/40P |
Serial Real Time Clock with 44Bytes NVRAM and Reset |
| M4T28-BR12SH |
606Kb/34P |
3.0/3.3V I2C Combination Serial RTC, NVRAM Supervisor and Microprocessor Supervisor |
| M4T28-BR12SH |
172Kb/12P |
TIMEKEEPER SNAPHAT (BATTERY & CRYSTAL) |
| M4T28-BR12SH |
521Kb/30P |
5.0 or 3.3 V, 256 Kbit (32 Kbit x 8) TIMEKEEPER짰 SRAM |
| M4T28-BR12SH |
497Kb/26P |
5 V, 256 Kbit (32 Kb x 8) TIMEKEEPER짰 SRAM |
| M4T28-BR12SH |
518Kb/31P |
5 V, 64 Kbit (8 Kb x 8) TIMEKEEPER짰 SRAM June 2010 Rev 10 |
| M4T28-BR12SH |
139Kb/16P |
TIMEKEEPER짰 SNAPHAT짰 (battery and crystal) |
 ARTSCHIP ELECTRONIC... |
M4T28-BR12SH |
7Mb/27P |
TIMEKEEPER SRAM |
 STMicroelectronics |
M4T28-BR12SH1 |
51Kb/7P |
TIMEKEEPER SNAPHAT Battery & Crystal November 1999 |
| M4T28-BR12SH1 |
346Kb/41P |
Serial real-time clock with 44 bytes NVRAM and reset |
| M4T28-BR12SH1 |
250Kb/28P |
3.3V, 256Kbit (32Kbit x 8) TIMEKEEPER짰 SRAM |
| M4T28-BR12SH1 |
172Kb/12P |
TIMEKEEPER SNAPHAT (BATTERY & CRYSTAL) |
| M4T28-BR12SH1 |
358Kb/41P |
Serial real-time clock with 44 bytes NVRAM and reset |
| M4T28-BR12SH1 |
139Kb/16P |
TIMEKEEPER짰 SNAPHAT짰 (battery and crystal) |
| M4T28-BR12SH1 |
135Kb/16P |
TIMEKEEPER SNAPHAT (battery and crystal) |
| M4T28-BR12SH1TR |
172Kb/12P |
TIMEKEEPER SNAPHAT (BATTERY & CRYSTAL) |
| M4T28-BR12SH1TR |
139Kb/16P |
TIMEKEEPER짰 SNAPHAT짰 (battery and crystal) |
| M4T28-BR12SH1TR |
135Kb/16P |
TIMEKEEPER SNAPHAT (battery and crystal) |
| M4T28-BR12SH6 |
51Kb/7P |
TIMEKEEPER SNAPHAT Battery & Crystal November 1999 |
| M4T28-BR12SH6 |
172Kb/12P |
TIMEKEEPER SNAPHAT (BATTERY & CRYSTAL) |
| M4T28-BR12SH6 |
139Kb/16P |
TIMEKEEPER짰 SNAPHAT짰 (battery and crystal) |
| M4T28-BR12SH6 |
135Kb/16P |
TIMEKEEPER SNAPHAT (battery and crystal) |
| M4T28-BR12SH6TR |
172Kb/12P |
TIMEKEEPER SNAPHAT (BATTERY & CRYSTAL) |
| M4T28-BR12SH6TR |
139Kb/16P |
TIMEKEEPER짰 SNAPHAT짰 (battery and crystal) |