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序号 型号 描述 大小 厂家Logo 下载
1 M4T28-BR12SH 5.0 OR 3.0V, 512 bit 64 x 8 SERIAL RTC and NVRAM SUPERVISOR 475K ST 5148939
2 M4T28-BR12SH 5.0 OR 3.0V, 512 bit 64 x 8 SERIAL RTC and NVRAM SUPERVISOR 475K ST 4673349
3 M4T28-BR12SH TIMEKEEPER SNAPHAT Battery & Crystal 52K ST 4673348
4 M4T28-BR12SH 512 bit (64 bit x8) Serial Access TIMEKEEPER SRAM 354K ST 4673347
5 M4T28-BR12SH 3.3V-5V 256 Kbit 32Kb x8 TIMEKEEPER SRAM 523K ST 2808682
6 M4T28-BR12SH Serial Real Time Clock with 56 Bytes of NVRAM 237K ST 2808681
7 M4T28-BR12SH 5.0 V PC real-time clock 325K ST 2808680
8 M4T28-BR12SH Serial Real Time Clock with 44Bytes NVRAM and Reset 336K ST 2808679
9 M4T28-BR12SH 3.0/3.3V I2C Combination Serial RTC, NVRAM Supervisor and Microprocessor Supervisor 621K ST 2808678
10 M4T28-BR12SH TIMEKEEPER SNAPHAT (BATTERY & CRYSTAL) 176K ST 2808677
11 M4T28-BR12SH 5.0 or 3.3 V, 256 Kbit (32 Kbit x 8) TIMEKEEPER? SRAM 534K ST 1700924
12 M4T28-BR12SH 5 V, 256 Kbit (32 Kb x 8) TIMEKEEPER? SRAM 509K ST 1700922
13 M4T28-BR12SH 5.0 OR 3.0V, 512 bit 64 x 8 SERIAL RTC and NVRAM SUPERVISOR 543K STMICROELECTRONICS 395958
14 M4T28-BR12SH TIMEKEEPER? SNAPHAT? (battery and crystal) 143K STMICROELECTRONICS 48929
15 M4T28-BR12SH 5 V, 64 Kbit (8 Kb x 8) TIMEKEEPER? SRAM 531K STMICROELECTRONICS 48928
16 M4T28-BR12SH 5.0 OR 3.0V, 512 bit 64 x 8 SERIAL RTC and NVRAM SUPERVISOR 543K STMICROELECTRONICS 48927
17 M4T28-BR12SH_03 TIMEKEEPER SNAPHAT (BATTERY & CRYSTAL) 176K ST 2808670
18 M4T28-BR12SH_08 TIMEKEEPER? SNAPHAT? (battery and crystal) 143K STMICROELECTRONICS 48940
19 M4T28-BR12SH1 TIMEKEEPER SNAPHAT Battery & Crystal 52K ST 4673346
20 M4T28-BR12SH1 Serial real-time clock with 44 bytes NVRAM and reset 354K ST 2808676
21 M4T28-BR12SH1 3.3V, 256Kbit (32Kbit x 8) TIMEKEEPER㈢ SRAM 256K ST 2808675
22 M4T28-BR12SH1 TIMEKEEPER SNAPHAT (BATTERY & CRYSTAL) 176K ST 2808674
23 M4T28-BR12SH1 TIMEKEEPER? SNAPHAT? (battery and crystal) 143K STMICROELECTRONICS 48932
24 M4T28-BR12SH1 Serial real-time clock with 44 bytes NVRAM and reset 367K STMICROELECTRONICS 48931
25 M4T28-BR12SH1TR TIMEKEEPER SNAPHAT (BATTERY & CRYSTAL) 176K ST 2808673
26 M4T28-BR12SH1TR TIMEKEEPER? SNAPHAT? (battery and crystal) 143K STMICROELECTRONICS 48934
27 M4T28-BR12SH6 TIMEKEEPER SNAPHAT Battery & Crystal 52K ST 4673345
28 M4T28-BR12SH6 TIMEKEEPER SNAPHAT (BATTERY & CRYSTAL) 176K ST 2808672
29 M4T28-BR12SH6 TIMEKEEPER? SNAPHAT? (battery and crystal) 143K STMICROELECTRONICS 48937
30 M4T28-BR12SH6TR TIMEKEEPER SNAPHAT (BATTERY & CRYSTAL) 176K ST 2808671