DS1210SN/T&R

Manufacturer Part NumberDS1210SN/T&R
DescriptionMemory Controllers
ManufacturerMaxim Integrated
DS1210SN/T&R datasheet
 


Specifications of DS1210SN/T&R

Part # Aliases90-1210S-NTR  
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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 PDIP or 16-Pin SO
Packages
 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 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
TOL
CC
NC
GND
DS1210S 16-pin SO (300 mils)
PIN DESCRIPTION
V
CCO
V
BAT1
TOL
GND
CE
CEO
V
BAT2
V
CCI
NC
1 of 8
19-6294; Rev 6/12
DS1210
1
8
VCCI
2
7
VBAT2
TOL
3
6
CEO
GND
4
5
CE
DS1210 8-pin PDIP (300 mils)
1
NC
16
VCCI
2
15
NC
3
14
4
13
VBAT2
5
12
NC
6
11
CEO
NC
7
10
CE
8
9
- RAM Supply
- + Battery 1
- Power Supply Tolerance
- Ground
- Chip Enable Input
- Chip Enable Output
- + Battery 2
- + Supply
- No Connect

DS1210SN/T&R 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 PDIP or 16-Pin SO Packages  Consumes <100nA of Battery Current  Tests Battery ...

  • 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 RAM I 10 µA CC02 Total Drain 10.1 µA SECTION B - PROCESSOR RESET ...

  • Page 4

    ABSOLUTE MAXIMUM RATINGS Voltage Range on Any Pin Relative to Ground Operating Temperature Range Storage Temperature Range Soldering Temperature (reflow, SO) Lead Temperature (soldering, 10s) This is a stress rating only and functional operation of the device at these or ...

  • Page 5

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

  • Page 6

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

  • Page 7

    ORDERING INFORMATION PART TEMP RANGE DS1210+ 0°C to +70°C DS1210N+ -40°C to +85°C DS1210S+ 0°C to +70°C DS1210SN+ -40°C to +85°C +Denotes a lead(Pb)-free/RoHS-compliant package. PACKAGE INFORMATION For the latest package outline information and land patterns (footprints www.maxim-ic.com/packages. ...

  • Page 8

    ... © 2012 Maxim Integrated Products DESCRIPTION Maxim is a registered trademark of Maxim Integrated Products, Inc. DS1210 PAGES CHANGED ...