DS1211S/T&R datasheet, PDF - EEWORLD Datasheet

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DS1211S/T&R: DescriptionIC controller 8-chip NV 20-soic; CategoryThe embedded processor and controller Microcontrollers and processors; File Size13KB，1 Pages; ManufacturerMaxim; Websitehttps://www.maximintegrated.com/en.html

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DS1211S/T&R Overview

IC controller 8-chip NV 20-soic

DS1211S/T&R Parametric

Parameter Name	Attribute value
Is it Rohs certified?	incompatible
Maker	Maxim
Parts packaging code	SOIC
package instruction	0.300 INCH, SOIC-20
Contacts	20
Reach Compliance Code	_compli
JESD-30 code	R-PDSO-G20
JESD-609 code	e0
length	12.8 mm
Humidity sensitivity level	1
Number of terminals	20
Maximum operating temperature	70 °C
Minimum operating temperature
Package body material	PLASTIC/EPOXY
encapsulated code	SOP
Package shape	RECTANGULAR
Package form	SMALL OUTLINE
Peak Reflow Temperature (Celsius)	245
Certification status	Not Qualified
Maximum seat height	2.65 mm
Nominal supply voltage	5 V
surface mount	YES
technology	CMOS
Temperature level	COMMERCIAL
Terminal surface	Tin/Lead (Sn/Pb)
Terminal form	GULL WING
Terminal pitch	1.27 mm
Terminal location	DUAL
Maximum time at peak reflow temperature	NOT SPECIFIED
width	7.5 mm
uPs/uCs/peripheral integrated circuit type	MICROPROCESSOR CIRCUIT

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DS1211

Nonvolatile Controller x 8 Chip

www.dalsemi.com

FEATURES

Converts full CMOS RAMs into nonvolatile

memories

Unconditionally write protects when V

out of tolerance

Automatically switches to battery when

power-fail occurs

3 to 8 decoder provides control for up to eight

CMOS RAMs

Consumes less than 100 nA of battery current

Tests battery condition on power-up

Provides for redundant batteries

Power-fail signal can be used to interrupt

processor on power failure

Optional 5% or 10% power-fail detection

Optional 20-pin SOIC surface mount package

Optional industrial temperature range of

-40°C to +85°C

PIN ASSIGNMENT

VBAT1

VCCO

TOL

CE7

CE6

GND

VCCI

VBAT2

CE0

CE1

CE2

CE3

CE4

CE5

VBAT1

VCCO

TOL

CE7

CE6

GND

VCCI

VBAT2

CE0

CE1

CE2

CE3

CE4

CE5

20-Pin DIP (300-mil)

See Mech. Drawings

Section

20-Pin SOIC (300-mil)

See Mech. Drawings

Section

PIN DESCRIPTION

A, B, C

CE0

- Address Inputs

- Chip Enable Input

- Chip Enable Outputs

- Ground

- + Battery 1

- + Battery 2

- Power Supply Tolerance

- +5V Supply

- RAM Supply

- Power-fail

- No Connection

CE7

GND

BAT1

BAT2

TOL

CCI

CC0

DESCRIPTION

The DS1211 Nonvolatile Controller x 8 Chip is a CMOS circuit which solves the application problem of

converting CMOS RAMs into nonvolatile memories. Incoming power is monitored for an out-of-

tolerance condition. When such a condition is detected, the chip enables are inhibited to accomplish write

protection and the battery is switched on to supply RAMs with uninterrupted power. Special circuitry

uses a low-leakage CMOS process which affords precise voltage detection at extremely low battery

consumption.

By combining the DS1211 nonvolatile controller/decoder chip and lithium batteries, nonvolatile RAM

operation can be achieved for up to eight CMOS memories.

See the data sheet for the DS1212 Nonvolatile Controller x 16 Chip for electrical specifications and

operation.

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