DS1210SN/T&R Maxim Integrated, DS1210SN/T&R Datasheet

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DS1210SN/T&R

Manufacturer Part Number
DS1210SN/T&R
Description
Memory Controllers
Manufacturer
Maxim Integrated
Datasheet

Specifications of DS1210SN/T&R

Part # Aliases
90-1210S-NTR
FEATURES
 Converts CMOS RAMs into Nonvolatile
 Unconditionally Write Protects when V
 Automatically Switches to Battery when
 Space-Saving 8-Pin PDIP or 16-Pin SO
 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
 Optional Industrial (N) Temperature Range of
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.
Memories
Out-of-Tolerance
Power-Fail Occurs
Packages
Switch
-40°C to +85°C
CC
CC
is
1 of 8
PIN ASSIGNMENT
PIN DESCRIPTION
V
V
TOL
GND
V
V
NC
CE
CEO
Nonvolatile Controller Chip
CCO
BAT1
BAT2
CCI
VBAT1
VCCO
GND
TOL
NC
NC
NC
NC
VBAT1
VCCO
DS1210S 16-pin SO (300 mils)
DS1210 8-pin PDIP (300 mils)
GND
TOL
1
2
3
5
6
7
8
4
1
2
3
4
- RAM Supply
- + Battery 1
- Power Supply Tolerance
- Ground
- Chip Enable Input
- Chip Enable Output
- + Battery 2
- + Supply
- No Connect
16
15
14
13
12
11
10
8
7
6
5
9
19-6294; Rev 6/12
VCCI
VBAT2
CEO
CE
NC
VCCI
NC
VBAT2
NC
CEO
NC
CE
DS1210

Related parts for DS1210SN/T&R

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 ...

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