DS17885S-5/T&R+ Maxim Integrated Products, DS17885S-5/T&R+ Datasheet - Page 7

• Manufacturer Part Number: DS17885S-5/T&R+
• Description: IC RTC 5V 8K NV RAM 24-SOIC
• Manufacturer: Maxim Integrated Products
• Type: Clock/Calendar/NVSRAMr

Specifications of DS17885S-5/T&R+

• Memory Size: 64K (8K x 8)
• Time Format: HH:MM:SS (12/24 hr)
• Date Format: YY-MM-DD-dd
• Interface: Parallel
• Voltage - Supply: 4.5 V ~ 5.5 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 24-SOIC (7.5mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

(V
CC
12, 16
4–11
2, 3
400
350
300
250
200
24
1
= +3.3V, T
2.5
V
PIN
CC
= 0V
21, 22, 26
2.8
12–17,
19, 20
9, 10
A
vs. INPUT VOLTAGE
SUPPLY CURRENT
28
8
= +25°C, unless otherwise noted.)
3.0
V
BAT
(V)
AD0–AD7
3.3
NAME
X1, X2
GND
3.5
Active-Low Power-On Reset. This open-drain output pin is intended for use as an on/off
control for the system power. With V
automatically activated from a kickstart input by the
Once the system is powered on, the state of
registers. The
5V operation, the voltage of the pullup supply should be no greater than 5.7V. For 3V
operation, the voltage on the pullup supply should be no greater than 3.9V.
Connections for Standard 32.768kHz Quartz Crystal. The internal oscillator circuitry is
designed for operation with a crystal having a specified load capacitance (C
12.5pF. Pin X1 is the input to the oscillator and can optionally be connected to an external
32.768kHz oscillator. The output of the internal oscillator, pin X2, is left unconnected if an
external oscillator is connected to pin X1. These pins are missing (N.C.) on the EDIP
package.
Multiplexed Bidirectional Address/Data Bus. The addresses are presented during the first
portion of the bus cycle and latched into the device by the falling edge of ALE. Write data is
latched by the rising edge of
portion of the
state as
Ground
3.8
_____________________________________________________________________
400
350
300
250
transitions high.
-40
V
BAT
-25
low. The read cycle is terminated and the bus returns to a high-impedance
= 3.0V
pin can be connected through a pullup resistor to a positive supply. For
-10
vs. TEMPERATURE
SUPPLY CURRENT
TEMPERATURE (°C)
5
20
Typical Operating Characteristics
. In a read cycle, the device outputs data during the latter
35
CC
50
voltage removed from the device,
FUNCTION
65
80
Real-Time Clocks
can be controlled by bits in the control
32768.7
32768.6
32768.5
32768.4
32768.3
32768.2
32768.1
32768.0
pin or from a wake-up interrupt.
2.5
3.0
OSCILLATOR FREQUENCY
Pin Description
vs. SUPPLY VOLTAGE
SUPPLY VOLTAGE (V)
3.5
4.0
L
) of 6pF or
can be
4.5
5.0
5.5
7