DS1248Y-100IND Maxim Integrated Products, DS1248Y-100IND Datasheet - Page 7
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DS1248Y-100IND
Manufacturer Part Number
DS1248Y-100IND
Description
IC NVSRAM 1MBIT 100NS 32DIP
Manufacturer
Maxim Integrated Products
Datasheet
1.DS1248W-120.pdf
(18 pages)
Specifications of DS1248Y-100IND
Format - Memory
RAM
Memory Type
NVSRAM (Non-Volatile SRAM)
Memory Size
1M (128K x 8)
Speed
100ns
Interface
Parallel
Voltage - Supply
4.5 V ~ 5.5 V
Operating Temperature
-40°C ~ 85°C
Package / Case
32-DIP Module (600 mil), 32-EDIP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
DS1248Y-100IND
Manufacturer:
DALLAS
Quantity:
17
DS1248/DS1248P 1024k NV SRAM with Phantom Clock
Figure 2. Phantom Clock Register Definition
AM/PM/12/24-MODE
Bit 7 of the hours register is defined as the 12-hour or 24-hour mode-select bit. When high, the 12-hour
mode is selected. In the 12-hour mode, bit 5 is the AM/PM bit with logic high being PM. In the 24-hour
mode, bit 5 is the second 10-hour bit (20–23 hours).
OSCILLATOR AND RESET BITS
Bits 4 and 5 of the day register are used to control the RST and oscillator functions. Bit 4 controls the
RST (pin 1). When the RST bit is set to logic 1, the RST input pin is ignored. When the RST bit is set to
logic 0, a low input on the RST pin will cause the phantom clock to abort data transfer without changing
data in the watch registers. Bit 5 controls the oscillator. When set to logic 1, the oscillator is off. When set
to logic 0, the oscillator turns on and the watch becomes operational. These bits are shipped from the
factory set to a logic 1.
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