ML9070-02

• Real time clock/calendar of SECONDS, MINUTES, HOURS, DAY OF WEEK, DATE, MONTH and YEAR
• 4-bit data bus
• 4-bit address bus
• READ, WRITE ALE, and CHIP SELECT INPUTS
• Auto leap year
• ±30 second error correction by software
• Selectable interrupt outputs - 1/64 second, 1second, 1minute, 1hour
• Stop and restart of clock
• 12/24 hour format
• The ML9070-02 can input ALE from a microcontroller.
  - (In case there is no ALE input from a microcontroller, fix ALE to "H" or use ML9070-03.)
• Wide range of interface power supply : 2.7 V to 5.5 V
• Wide range of clock power supply : 2.0 V to 5.5 V
• Low current consumption
•ML9070-02
  - 18-pin plastic DIP (DIP18-P-300-2.54)
  - 24-pin plastic SOP (SOP24-P-430-1.27-K)
•ML9070-03
  - 16-pin plastic DIP (DIP16-P-300-2.54)
  - 16-Pin plastic SOP (SOP16-P-300-1.27-K)

The ML9070-02/03 is a silicon gate CMOS Real Time Clock/Calendar for use in direct busconnection Microcontroller/Microprocessor applications. An on-chip 32.768 kHz crystal oscillator time base is divided to provide addressable 4-bit I/O data for SECONDS, MINUTES, HOURS, DAY OF WEEK, DATE, MONTH and YEAR. Data access is controlled by 4-bit address, chip selects (CS0, CS1), WRITE, READ, and ALE. The ML9070-03 is not provided with the ALE pin. Control Registers D, E and F provide 30 SECOND error adjustment, INTERRUPT REQUEST (IRQ FLAG) and BUSY status bits, clock STOP, HOLD, and RESET FLAG bits, 4 selectable INTERRUPTS rates are available at the STD.P (STANDARD PULSE) output utilizing Control Register inputs T0, T1 and the INT/STND (INTERRUPT/STANDARD). Masking of the interrupt output (STD.P) can be accomplished via the MASK bit. The ML9070-02/03 can operate in a 12/24 hour format and Leap Year timing is automatic.

The interface supply voltage of ML9070-02 is 2.7 V to 5.5 V and the clock supply voltage during battery backup is 2.0 V to 5.5 V. A low current consumption has been realized.