4-bit REAL TIME CLOCK MODULE
RTC-72421/72423
• Builtin crystal unit allows adjustment-free efficient operation.
• ALE input terminal available for 8048, 8051, and 8085 series.
• 12/24H clock switchover function and automatic leap year setting.
• Interrupt masking.
• 30 second adjustment function.
• Low current consumption and features a backup function.
| ABSOLUTE MAXIMUM RATINGS(1) |
Power source voltage Input and output voltage Storage temperature
Soldering condition Symbol VDD VI/O TSTG TSOL Condition Ta=25˚C
Ta=25˚C RTC-72421 RTC-72423 RTC-72421 RTC-72423 Specifications -0.3
to 7.0 GND -0.3 to VDD+0.3 -55 to +85 -55 to +125 Under 260˚C
within 10 sec. (lead part) (package should be less than 150˚C)
Twice at under 260˚C within 10 sec. or under 230˚C within 3 min.
Unit V ˚C |
PART OF STOCK
| TRANS. FDS9435A | 1500 | FSC | 15+ | SOP-8 |
| DIODO MMBD4148,215 | 300000 | | 15+ | SOT23-3 |
| C.I L7805CD2T-TR | 2500 | ST | 14+ | D2PAK |
| FDS6990A | 1500 | FSC | 15+ | SOP-8 |
| NDS9952A | 1500 | FSC | 15+ | SOP-8 |
| SN65HVD485EDR | 1500 | TI | 16+ | SOP-8 |
| SMBJ8.5CA | 7500 | VISHAY | 16+ | SMB |
| PIC24FJ16GA004-I/PT | 1500 | MICROCHIP | 13+ | TQFP-44 |
| C.I TLC072CDGNR | 5000 | TI | 05+ | MSOP-8 |
| C.I SN74LS374N | 2000 | TI | 15+ | DIP-20 |
| TRANS. BC817-16LT1G | 300000 | ON | 12+ | SOT-23 |
| C.I TL074CN | 1000 | TI | 12+ | DIP-14 |
| OPTOACOPLADOR MOC3063SM | 20000 | FSC | 14+ | SOP-6 |
| TRIAC BT151-500R | 300000 | | 16+ | TO-220 |
| C.I MM74HC164MX | 25000 | FSC | 05+ | SOP-14 |
| C.I WS79L05 | 100000 | WS | 16+ | TO-92 |
| RES RL1206FR-070R75L | 100000 | YAGEO | 16+ | SMD1206 |
| RES RC1206FR-071R5L | 500000 | YAGEO | 16+ | SMD1206 |
| RES RC1206FR-071R2L | 500000 | YAGEO | 16+ | SMD1206 |
| RES RL1206FR-070R68L | 1000000 | YAGEO | 16+ | SMD1206 |
| RES RC0402FR-0722KL | 3000000 | YAGEO | 16+ | SMD0402 |
| RES RC0402FR-0756RL | 2000000 | YAGEO | 16+ | SMD0402 |
| RES RC0402FR-0724RL | 2000000 | YAGEO | 16+ | SMD0402 |
| RES RC1206JR-072ML | 500000 | YAGEO | 16+ | SMD1206 |
| CAP 1206 22PF 1KV NP0 CL31C220JIFNFNE | 600000 | SAMSUNG | 16+ | SMD1206 |
