DS1345AB：1024k Nonvolatile SRAM with Battery Monitor _ BDTIC a Leading Distributor in China

DS1345AB：1024k Nonvolatile SRAM with Battery Monitor

The DS1345 1024k Nonvolatile (NV) SRAMs are 1,048,576-bit, fully static, NV SRAMs organized as 131,072 words by 8 bits. Each NV SRAM 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 write protection is unconditionally enabled to prevent data corruption. Additionally, the DS1345 devices have dedicated circuitry for monitoring the status of VCC and the status of the internal lithium battery. DS1345 devices in the PowerCap module package are directly surface mountable and are normally paired with a DS9034PC PowerCap to form a complete NV SRAM module. The devices can be used in place of 128k x 8 SRAM, EEPROM, or Flash components.

Key Features

10 years minimum data retention in the absence of external power
Data is automatically protected during power loss
Power supply monitor resets processor when VCC power loss occurs and holds processor in reset during VCC ramp-up
Battery monitor checks remaining capacity daily
Read and write access times of 100ns
Unlimited write cycle endurance
Typical standby current 50µA
Upgrade for 128k x 8 SRAM, EEPROM or Flash
Lithium battery is electrically disconnected to retain freshness until power is applied for the first time
Full ±10% VCC operating range (DS1345Y) or optional ±5% VCC operating range (DS1345AB)
Optional industrial temperature range of -40°C to +85°C, designated IND
PowerCap Module (PCM) package
- Directly surface-mountable module
- Replaceable snap-on PowerCap provides lithium backup battery
- Standardized pinout for all NV SRAM products
- Detachment feature on PowerCap allows easy removal using a regular screwdriver

DS1345AB, DS1345Y: Pin Assignment

DataSheet

title	Download file
DS1345AB-DS1345Y Data Sheet	DS1345AB-DS1345Y.pdf

Parametrics

Part Number	Memory Type	Memory Size	Bus Type	V_SUPPLY (V)	V_SUPPLY (V)	Package/Pins	Budgetary Price
Part Number	Memory Type	Memory Size	Bus Type	min	max	Package/Pins	See Notes
DS1345AB	NV SRAM	128K x 8	Parallel	4.75	5.25	PCAP/34	$16.66 @1k
DS1345Y	NV SRAM	128K x 8	Parallel	4.5	5.5	PCAP/34	$16.66 @1k

Ordering Information

Part Number	Notes	Status	Recommended Replacement	Package	Temp	RoHS
DS1345ABP-100	5% Tolerance, 100ns	No Longer Available	DS1345ABP-70+	PCAP,;34 pin;596.9 mm²	0°C to +70°C	See data sheet
DS1345ABP-100+		Active		PCAP,;34 pin;596.9 mm²	0°C to +70°C	Lead Free
DS1345ABP-70	5% Tolerance, 70ns	No Longer Available	DS1345ABP-70+	PCAP,;34 pin;596.9 mm²	0°C to +70°C	See data sheet
DS1345ABP-70+		Active		PCAP,;34 pin;596.9 mm²	0°C to +70°C	Lead Free
DS1345ABP-70IND	5% Tolerance, 70ns	No Longer Available	DS1345ABP-70IND+	PCAP,;34 pin;596.9 mm²	-40°C to +85°C	See data sheet
DS1345ABP-70IND+		Active		PCAP,;34 pin;596.9 mm²	-40°C to +85°C	Lead Free