DS1501YS+ Maxim Integrated, DS1501YS+ Datasheet - Page 10

• Manufacturer Part Number: DS1501YS+
• Description: Real Time Clock
• Manufacturer: Maxim Integrated
• Series: DS1501, DS1511r

Specifications of DS1501YS+

• Rohs: yes
• Function: Clock, Calendar, Alarm, Watchdog Timekeeper
• Rtc Bus Interface: Parallel
• Time Format: HH
• Rtc Memory Size: 256 B
• Supply Voltage - Max: 5.5 V
• Supply Voltage - Min: 4.5 V
• Maximum Operating Temperature: + 70 C
• Minimum Operating Temperature: 0 C
• Mounting Style: SMD/SMT
• Package / Case: SOIC-28
• Part # Aliases: 90-1501Y+S00

Figure 8. Block Diagram
Figure 9. Typical Crystal Layout
LOCAL GROUND PLANE (LAYER 2)
X1
X2
V
V
GND
V
KS
BAUX
BAT
BAT
CRYSTAL
32.768kHz CLOCK
OSCILLATOR
WRITE PROTECTION,
POWER CONTROL
AND POWER-ON
RESET
CLOCK ALARM AND WATCHDOG
GND
X1
X2
COUNTDOWN
DS1501/DS1511
10 of 22
DS1501/DS1511 Y2KC Watchdog Real-Time Clocks
CLOCK AND CONTROL
REGISTERS
NV SRAM
256 x 8
16 X 8
IRQ
SQW
DQ0–DQ7
PWR
RST
CE
WE
A0–A4
OE