DS1210SN datasheet, PDF - EEWORLD Datasheet

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DS1210SN: DescriptionIC cntrlr chip NV ind 16-soic; CategoryPower/power management The power supply circuit; File Size316KB，8 Pages; ManufacturerMaxim; Websitehttps://www.maximintegrated.com/en.html

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DS1210SN Overview

IC cntrlr chip NV ind 16-soic

DS1210SN Parametric

Parameter Name	Attribute value
Is it lead-free?	Contains lead
Is it Rohs certified?	incompatible
Maker	Maxim
Parts packaging code	SOIC
package instruction	0.300 INCH, SOIC-16
Contacts	16
Reach Compliance Code	_compli
ECCN code	EAR99
Adjustable threshold	NO
Analog Integrated Circuits - Other Types	POWER SUPPLY SUPPORT CIRCUIT
JESD-30 code	R-PDSO-G16
JESD-609 code	e0
length	10.3 mm
Humidity sensitivity level	1
Number of channels	3
Number of functions	1
Number of terminals	16
Maximum operating temperature	85 °C
Minimum operating temperature	-40 °C
Package body material	PLASTIC/EPOXY
encapsulated code	SOP
Encapsulate equivalent code	SOP16,.4
Package shape	RECTANGULAR
Package form	SMALL OUTLINE
Peak Reflow Temperature (Celsius)	245
power supply	5 V
Certification status	Not Qualified
Maximum seat height	2.65 mm
Maximum supply current (Isup)	80 mA
Maximum supply voltage (Vsup)	5.5 V
Minimum supply voltage (Vsup)	4.5 V
Nominal supply voltage (Vsup)	5 V
surface mount	YES
technology	CMOS
Temperature level	INDUSTRIAL
Terminal surface	TIN LEAD
Terminal form	GULL WING
Terminal pitch	1.27 mm
Terminal location	DUAL
Maximum time at peak reflow temperature	NOT SPECIFIED
width	7.5 mm

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19-6294; Rev 6/12

DS1210

Nonvolatile Controller Chip

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

PIN ASSIGNMENT

VCCO

VBAT1

TOL

GND

VCCI

VBAT2

CEO

DS1210 8-pin PDIP (300 mils)

VCCO

VBAT1

TOL

GND

VCCI

VBAT2

CEO

DS1210S 16-pin SO (300 mils)

PIN DESCRIPTION

CCO

BAT1

TOL

GND

CEO

BAT2

CCI

- RAM Supply

- + Battery 1

- Power Supply Tolerance

- Ground

- Chip Enable Input

- Chip Enable Output

- + Battery 2

- + Supply

- No Connect

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.

1 of

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

CCI

) depending on

which is greater. This switch has a voltage drop of less than 0.3V.

The second function which the nonvolatile controller provides is power-fail detection. The DS1210

constantly monitors the incoming supply. When the supply goes out of tolerance, a precision comparator

detects power-fail and inhibits chip enable (

CEO

The third function of write protection is accomplished by holding the

CEO

output signal to within 0.2

volts of the V

CCI

or battery supply. If

input is low at the time power-fail detection occurs, the

CEO

output is kept in its present state until

is returned high. The delay of write protection until the current

memory cycle is completed prevents the corruption of data. Power-fail detection occurs in the range of

4.75 volts to 4.5 volts with the tolerance (TOL) pin grounded. If TOL in connected to V

CCO

, then power-

fail detection occurs in the range of 4.5 volts to 4.25 volts. During nominal supply conditions

CEO

will

with a maximum propagation delay of 20ns.

The fourth function the DS1210 performs is a battery status warning so that potential data loss is avoided.

Each time that the circuit is powered up the battery voltage is checked with a precision comparator. If the

battery voltage is less than 2.0 volts, the second memory cycle is inhibited. Battery status can, therefore,

be determined by performing a read cycle after power-up to any location in memory, verifying that

memory location content. A subsequent write cycle can then be executed to the same memory location

altering the data. If the next read cycle fails to verify the written data, then the batteries are less than 2.0V

and data is in danger of being corrupted.

The fifth function of the nonvolatile controller provides for battery redundancy. In many applications,

data integrity is paramount. In these applications it is often desirable to use two batteries to ensure

reliability. The DS1210 controller provides an internal isolation switch which allows the connection of

two batteries. During battery backup operation the battery with the highest voltage is selected for use. If

one battery should fail, the other will take over the load. The switch to a redundant battery is transparent

to circuit operation and to the user. A battery status warning will occur when the battery in use falls below

2.0 volts. A grounded V

BAT2

pin will not activate a battery-fail warning. In applications where battery

redundancy is not required, a single battery should be connected to the BAT1 pin, and the BAT2 battery

pin must be grounded. The nonvolatile controller contains circuitry to turn off the battery backup. This is

to maintain the battery(s) at its highest capacity until the equipment is powered up and valid data is

written to the SRAM. While in the freshness seal mode the

CEO

and V

CCO

will be forced to V

. When

the batteries are first attached to one or both of the V

BAT

pins, V

CCO

will not provide battery back-up until

CCI

exceeds V

CCTP

, as set by the TOL pin, and then falls below V

BAT

Figure 1 shows a typical application incorporating the DS1210 in a microprocessor-based system. Section

A shows the connections necessary to write protect the RAM when V

is less than 4.75 volts and to back

up the supply with batteries. Section B shows the use of the DS1210 to halt the processor when V

less than 4.75 volts and to delay its restart on power-up to prevent spurious writes.

OPERATION

DS1210

2 of

DS1210SN Related Products

	DS1210SN	DS1210	DS1210N	DS1210S	DS1210S/T&R	DS1210SN/T&R	DS1210SN-TR	DS1210S/T&R;	DS1210SN/T&R;	DS1210SN+T&R;
Description	IC cntrlr chip NV ind 16-soic	IC controller chip NV 8-dip	IC controller chip NV ind 8-dip	IC controller chip NV 16-soic	IC controller chip NV 16-soic	IC controller chip NV ind 16soic		IC CONTROLLER CHIP NV 16-SOIC	IC CONTROLLER CHIP NV IND 16SOIC	IC CNTRLR CHIP NV IND 16-SOIC
Is it lead-free?	Contains lead	Contains lead	Contains lead	Contains lead	Contains lead	Contains lead	-	-	-	-
Is it Rohs certified?	incompatible	incompatible	incompatible	incompatible	incompatible	incompatible	-	-	-	-
Parts packaging code	SOIC	DIP	DIP	SOIC	SOIC	SOIC	-	-	-	-
package instruction	0.300 INCH, SOIC-16	0.300 INCH, DIP-8	0.300 INCH, DIP-8	0.300 INCH, SOIC-16	0.300 INCH, SOIC-16	0.300 INCH, SOIC-16	-	-	-	-
Contacts	16	8	8	16	16	16	-	-	-	-
Reach Compliance Code	_compli	_compli	_compli	_compli	_compli	_compli	-	-	-	-
ECCN code	EAR99	EAR99	EAR99	EAR99	EAR99	EAR99	-	-	-	-
Adjustable threshold	NO	NO	NO	NO	NO	NO	-	-	-	-
Analog Integrated Circuits - Other Types	POWER SUPPLY SUPPORT CIRCUIT	POWER SUPPLY SUPPORT CIRCUIT	POWER SUPPLY SUPPORT CIRCUIT	POWER SUPPLY SUPPORT CIRCUIT	POWER SUPPLY SUPPORT CIRCUIT	POWER SUPPLY SUPPORT CIRCUIT	-	-	-	-
JESD-30 code	R-PDSO-G16	R-PDIP-T8	R-PDIP-T8	R-PDSO-G16	R-PDSO-G16	R-PDSO-G16	-	-	-	-
JESD-609 code	e0	e0	e0	e0	e0	e0	-	-	-	-
length	10.3 mm	9.375 mm	9.375 mm	10.3 mm	10.3 mm	10.3 mm	-	-	-	-
Humidity sensitivity level	1	1	1	1	1	1	-	-	-	-
Number of channels	3	3	3	3	3	3	-	-	-	-
Number of functions	1	1	1	1	1	1	-	-	-	-
Number of terminals	16	8	8	16	16	16	-	-	-	-
Maximum operating temperature	85 °C	70 °C	85 °C	70 °C	70 °C	85 °C	-	-	-	-
Package body material	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	-	-	-	-
encapsulated code	SOP	DIP	DIP	SOP	SOP	SOP	-	-	-	-
Encapsulate equivalent code	SOP16,.4	DIP8,.3	DIP8,.3	SOP16,.4	SOP16,.4	SOP16,.4	-	-	-	-
Package shape	RECTANGULAR	RECTANGULAR	RECTANGULAR	RECTANGULAR	RECTANGULAR	RECTANGULAR	-	-	-	-
Package form	SMALL OUTLINE	IN-LINE	IN-LINE	SMALL OUTLINE	SMALL OUTLINE	SMALL OUTLINE	-	-	-	-
Peak Reflow Temperature (Celsius)	245	245	245	245	245	245	-	-	-	-
power supply	5 V	5 V	5 V	5 V	5 V	5 V	-	-	-	-
Certification status	Not Qualified	Not Qualified	Not Qualified	Not Qualified	Not Qualified	Not Qualified	-	-	-	-
Maximum seat height	2.65 mm	4.572 mm	4.572 mm	2.65 mm	2.65 mm	2.65 mm	-	-	-	-
Maximum supply current (Isup)	80 mA	80 mA	80 mA	80 mA	80 mA	80 mA	-	-	-	-
Maximum supply voltage (Vsup)	5.5 V	5.5 V	5.5 V	5.5 V	5.5 V	5.5 V	-	-	-	-
Minimum supply voltage (Vsup)	4.5 V	4.5 V	4.5 V	4.5 V	4.5 V	4.5 V	-	-	-	-
Nominal supply voltage (Vsup)	5 V	5 V	5 V	5 V	5 V	5 V	-	-	-	-
surface mount	YES	NO	NO	YES	YES	YES	-	-	-	-
technology	CMOS	CMOS	CMOS	CMOS	CMOS	CMOS	-	-	-	-
Temperature level	INDUSTRIAL	COMMERCIAL	INDUSTRIAL	COMMERCIAL	COMMERCIAL	INDUSTRIAL	-	-	-	-
Terminal surface	TIN LEAD	Tin/Lead (Sn/Pb)	Tin/Lead (Sn/Pb)	Tin/Lead (Sn/Pb)	TIN LEAD	TIN LEAD	-	-	-	-
Terminal form	GULL WING	THROUGH-HOLE	THROUGH-HOLE	GULL WING	GULL WING	GULL WING	-	-	-	-
Terminal pitch	1.27 mm	2.54 mm	2.54 mm	1.27 mm	1.27 mm	1.27 mm	-	-	-	-
Terminal location	DUAL	DUAL	DUAL	DUAL	DUAL	DUAL	-	-	-	-
Maximum time at peak reflow temperature	NOT SPECIFIED	NOT SPECIFIED	NOT SPECIFIED	NOT SPECIFIED	NOT SPECIFIED	NOT SPECIFIED	-	-	-	-
width	7.5 mm	7.62 mm	7.62 mm	7.5 mm	7.5 mm	7.5 mm	-	-	-	-

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