IC SMART/RAM ขนาด 5V 256K / 32 ม . Ds1216-D]

FEATURES Keeps track of hundredths of seconds, seconds, minutes, hours, days, date of the month, months, and years
Converts standard 2k x 8 up to 512k x 8 CMOS static RAMs into nonvolatile memory
Embedded lithium energy cell maintains watch information and retains RAM data
Watch function is transparent to RAM operation
Month and year determine the number of days in each month; leap-year compensation valid up to 2100
Lithium energy source is electrically disconnected to retain freshness until power is applied for the first time
Proven gas-tight socket contacts
Full
10% operating range
Operating temperature range: 0C to +70C
Accuracy is better than
1 minute/month @ +25C ORDERING INFORMATION DS1216B, DS1216C, DS1216D, DS1216E, DS1216F, DS1216H (See Figure 2 for letter suffix marking identification.) PIN DESCRIPTION RST - RESET DQ0 - Data Input/Output 0 [RAM] A2 - Address Bit 2 (Read/Write [ROM]) A0 - Address Bit 0 (Data Input [ROM]) GND - Ground CE - Conditioned Chip Enable OE - Output Enable WE - Write Enable Vcc - Switched VCC for 28-/32-Pin RAM VCCB - Switched VCC for 24-Pin RAM VCCD - Switched VCC for 28-Ppin RAM