IC CNTRLR CHIP NV IND 16-SOIC

DS1210SN+

Manufacturer Part NumberDS1210SN+
DescriptionIC CNTRLR CHIP NV IND 16-SOIC
ManufacturerMaxim Integrated Products
DS1210SN+ datasheet
 

Specifications of DS1210SN+

Controller TypeNonvolatile RAMVoltage - Supply4.75 V ~ 5.5 V
Operating Temperature-40°C ~ 85°CPackage / Case16-SOIC (0.300", 7.5mm Width)
Manual ResetNoWatchdogNo
Battery Backup SwitchingYesSupply Voltage (max)5.5 V
Supply Voltage (min)4.75 VSupply Current (typ)5 mA
Mounting StyleSMD/SMTMaximum Operating Temperature+ 85 C
Chip Enable SignalsYesMinimum Operating Temperature- 40 C
Lead Free Status / RoHS StatusLead free / RoHS Compliant  
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FEATURES
§ Converts CMOS RAMs into Nonvolatile
Memories
§ Unconditionally Write Protects when V
Out-of-Tolerance
§ Automatically Switches to Battery when
Power-Fail Occurs
§ Space-Saving 8-Pin DIP
§ Consumes <100nA of Battery Current
§ Tests Battery Condition on Power up
§ Provides for Redundant Batteries
§ Optional 5% or 10% Power-Fail Detection
§ Low Forward Voltage Drop on the V
Switch
§ Optional 16-Pin SOIC Surface Mount
Package
§ Optional Industrial (N) Temperature Range of
-40°C to +85°C
DESCRIPTION
The DS1210 Nonvolatile Controller Chip is a CMOS circuit which solves the application problem of
converting CMOS RAM into nonvolatile memory. Incoming power is monitored for an out-of-tolerance
condition. When such a condition is detected, chip enable is inhibited to accomplish write protection and
the battery is switched on to supply the RAM with uninterrupted power. Special circuitry uses a low-
leakage CMOS process which affords precise voltage detection at extremely low battery consumption.
The 8-pin DIP package keeps PC board real estate requirements to a minimum. By combining the
DS1210 Nonvolatile Controller Chip with a CMOS memory and batteries, nonvolatile RAM operation
can be achieved.
Nonvolatile Controller Chip
PIN ASSIGNMENT
VCCO
is
VBAT1
CC
NC
VCCO
NC
VBAT1
NC
CC
TOL
NC
GND
DS1210S 16-pin SOIC (300-mil)
PIN DESCRIPTION
V
CCO
V
BAT1
TOL
GND
CE
CEO
V
BAT2
V
CCI
NC
1 of 6
DS1210
1
8
VCCI
2
7
VBAT2
TOL
3
6
CEO
GND
4
5
CE
DS1210 8-pin DIP (300-mil)
See Mech. Drawings Section
1
16
NC
2
15
VCCI
NC
3
14
VBAT2
4
13
NC
5
12
CEO
6
11
7
10
NC
8
9
CE
See Mech. Drawings Section
- RAM Supply
- + Battery 1
- Power Supply Tolerance
- Ground
- Chip Enable Input
- Chip Enable Output
- + Battery 2
- + Supply
- No Connect
090503

DS1210SN+ Summary of contents

  • Page 1

    FEATURES § Converts CMOS RAMs into Nonvolatile Memories § Unconditionally Write Protects when V Out-of-Tolerance § Automatically Switches to Battery when Power-Fail Occurs § Space-Saving 8-Pin DIP § Consumes <100nA of Battery Current § Tests Battery Condition on Power ...

  • Page 2

    OPERATION The DS1210 nonvolatile controller performs five circuit functions required to battery back up a RAM. First, a switch is provided to direct power from the battery or the incoming supply (V which is greater. This switch has a voltage ...

  • Page 3

    SECTION A - BATTERY BACKUP Figure 1 BATTERY BACKUP CURRENT DRAIN EXAMPLE CONSUMPTION DS1210 I 100 nA BAT 10 mA RAM I CC02 10.1 mA Total Drain SECTION B - PROCESSOR RESET ...

  • Page 4

    ABSOLUTE MAXIMUM RATINGS* Voltage on Any Pin Relative to Ground Operating Temperature Storage Temperature Soldering Temperature * This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the ...

  • Page 5

    CAPACITANCE PARAMETER Input Capacitance Output Capacitance AC ELECTRICAL CHARACTERISTICS PARAMETER Propagation Delay CE High to Power-Fail CE (See Note 9; V Recovery at Power Up V Slew Rate Power-Down CC V Slew Rate Power-Down CC V Slew Rate Power-Down CC ...

  • Page 6

    TIMING DIAGRAM: POWER-UP TIMING DIAGRAM: POWER-DOWN OUTPUT LOAD Figure ...