DS1248：1024K NV SRAM with Phantom Clock _ BDTIC a Leading Distributor in China

DS1248：1024K NV SRAM with Phantom Clock

The DS1248 1024K NV SRAM with Phantom Clock is a fully static nonvolatile RAM (organized as 128K words by 8 bits) with a built-in real-time clock. The DS1248 has a self-contained lithium energy source and control circuitry, which constantly monitors VCC for an out-of-tolerance condition. When such a condition occurs, the lithium energy source is automatically switched on and writes protection is unconditionally enabled to prevent garbled data in both the memory and real-time clock.

Key Features

Real-Time Clock (RTC) Keeps Track of Hundredths of Seconds, Minutes, Hours, Days, Date of the Month, Months, and Years
128k x 8 NV SRAM Directly Replaces Volatile Static RAM or EEPROM
Embedded Lithium Energy Cell Maintains Calendar Operation and Retains RAM Data
Watch Function is Transparent to RAM Operation
Automatic Leap Year Compensation Valid Up to 2100
Full 10% Operating Range
Over 10 Years of Data Retention in the Absence of Power
Lithium Energy Source is Electrically Disconnected to Retain Freshness Until Power is Applied for the First Time
DIP Module Only
- Standard 32-Pin JEDEC Pinout
PowerCap Module Board Only
- Surface Mountable Package for Direct Connection to PowerCap Containing Battery and Crystal
- Replaceable Battery (PowerCap)
- Pin-for-Pin Compatible with DS1244P and DS1251P

DS1248, DS1248P: Pin Configuration

DataSheet

title	Download file
DS1248-DS1248P Data Sheet	DS1248-DS1248P.pdf

Parametrics

Part Number	Interface	V_SUPPLY (V)	Memory Type	Memory Size (Bytes)	Time of Day Alarms	Functions	Package/Pins	Budgetary Price
Part Number	Interface	V_SUPPLY (V)	Memory Type	Memory Size (Bytes)	Time of Day Alarms	Functions	Package/Pins	See Notes
DS1248	Bytewide Phantom Clock	3.3 5	NV SRAM	128K	0	RTC	EDIP/32 PCAP/34	$20.91 @1k

Ordering Information

Part Number	Status	Recommended Replacement	Package	Temp	RoHS
DS1248W-120+	Active		EDIP,;32 pin;707.2 mm²	0°C to +70°C	Lead Free
DS1248W-120IND+	Active		EDIP,;32 pin;707.2 mm²	-40°C to +85°C	Lead Free
DS1248WP-120+	Active		PCAP,;34 pin;596.9 mm²	0°C to +70°C	Lead Free
DS1248WP-120IND+	Active		PCAP,;34 pin;596.9 mm²	-40°C to +85°C	Lead Free
DS1248Y-70	No Longer Available	DS1248Y-70+	EDIP,;32 pin;707.2 mm²	0°C to +70°C	See data sheet
DS1248Y-70+	Active		EDIP,;32 pin;707.2 mm²	0°C to +70°C	Lead Free
DS1248Y-70IND+	Active		EDIP,;32 pin;707.2 mm²	-40°C to +85°C	Lead Free
DS1248YP-70+	Active		PCAP,;34 pin;596.9 mm²	0°C to +70°C	Lead Free