STMicroelectronics MK41T56
The MK41T56 TIMEKEEPER® is a low power 512 bit static CMOS RAM organized as 64 words by 8 bits. The built-in address register is incremented automatically after each write or read data byte. The MK41T56 clock has a built-in power sense circuit which detects power failures and automatically switches to the battery supply during power failures.| Part No. | MK41T56 |
|---|---|
| Datasheet | MK41T56 Download |
| Manufacturer |  STMicroelectronics |
| Description | 512 bit 64b x8 Serial Access TIMEKEEPER SRAM |
| Buy | Stock & Price |
DESCRIPTION
A built-in 32.768 kHz oscillator (external crystal controlled) and the first 8 bytes of the RAM are used for the clock/calendar function and are configured in binary coded decimal (BCD) format. Addresses and data are transferred serially via a two-line bi-directional bus. The energy needed to sustain the RAM and clock operations can be supplied from a small lithium button cell. Table 1. Signal Names OSCI OCSO FT/OUT SDA SCL VBAT VCC VSS March 1999 Oscillator Input Oscillator Output Frequency Test / Output Driver (Open Drain) Serial Data Address Input / Output Serial Clock Battery Supply Voltage Supply Voltage Ground 1/15 8 1 PSDIP8 (N) 0.4mm Frame 8 1 SO8 (S) 150mil Width Figure 1. Logic Diagram VCC VBAT OSCI SCL MK41T56 MKI41T56 OSCO SDA FT/OUT VSS AI02304 MK41T56, MKI41T56 Figure 2A. DIP Pin Connections Figure 2B. SOIC Pin Connections MK41T56 MKI41T56 OSCI OSCO VBAT VSS 1 2 3 4 8 7 6 5 AI02305 MK41T56 MKI41T56 VCC FT/OUT SCL SDA OSCI OSCO VBAT VSS 1 2 3 4 8 7 6 5 AI02306 VCC FT/OUT SCL SDA Table 2.
