DS90340I-PCX

DS90340I-PCX Datasheet

Uses DS9034PCX PowerCap

Part	Datasheet
DS90340I-PCX	DS90340I-PCX (pdf)

PDF Datasheet Preview
DS1743/DS1743P Y2K-Compliant, Nonvolatile Timekeeping RAMs PIN CONFIGURATIONS • Integrated NV SRAM, Real-Time Clock, Crystal, Power-Fail Control Circuit, and TOP VIEW Lithium Energy Source • Clock Registers are Accessed Identically to the Static RAM. These Registers Reside in the Eight Top RAM Locations. • Century Byte Register • Totally Nonvolatile with Over 10 Years of Operation in the Absence of Power • BCD-Coded Century, Year, Month, Date, Day, Hours, Minutes, and Seconds with Automatic Leap Year Compensation Valid N.C. A12 A7 A6 A5 A4 A3 A2 A1 A0 DQ0 DQ1 DQ2 GND 2 DS1743 27 VCC WE CE2 A8 A9 A11 OE A10 CE DQ7 DQ6 DQ5 DQ4 DQ3 through 2099 • Low-Battery-Voltage Level Indicator Flag • Power-Fail Write Protection Allows for ±10% 28-Pin Encapsulated Package 28 PIN 740 VCC Power-Supply Tolerance • Lithium Energy Source is Electrically Disconnected to Retain Freshness Until Power is Applied for the First Time • DIP Module Only Standard JEDEC Bytewide 8k x 8 Static RAM Pinout • PowerCap Module Board Only Surface-Mountable Package for Direct Connection to PowerCap Containing Battery and Crystal Replaceable Battery PowerCap Power-On Reset Output Pin-for-Pin Compatible with Other Densities N.C. N.C. N.C. RST VWCEC OE CE DQ7 DQ6 DQ5 DQ4 DQ3 DQ2 DQ1 DQ0 GND DS1743P 34 33 17 X1 GND VBAT X2 18 N.C. N.C. N.C. N.C. A12 A11 A10 A9 A8 A7 A6 A5 A4 A3 A2 A1 A0 34-Pin PowerCap Module Board Uses DS9034PCX PowerCap of DS174XP Timekeeping RAM • Underwriters Laboratories UL Recognized to Prevent Charging of the Internal Lithium Battery ORDERING INFORMATION PART TEMP RANGE PIN-PACKAGE VOLTAGE V TOP MARK** DS1743-85 DS1743-100 DS1743-100 IND DS1743P-85 DS1743P-100 DS1743P-100IND DS1743W-120 DS1743W-120 IND DS1743W-150 DS1743W-150 IND DS1743WP-120 DS1743WP-120 IND DS1743-85+ DS1743-100+ DS1743-100 IND+ DS1743P-85+ DS1743P-100+ DS1743P-100IND+ DS1743W-120+ DS1743W-120 IND+ DS1743W-150+ DS1743W-150 IND+ DS1743WP-120+ DS1743WP-120 IND+ DS9034PCX DS9034I-PCX DS9034PCX+ DS9034I-PCX+ 0°C to +70°C 0°C to +70°C -40°C to +85°C 0°C to +70°C 0°C to +70°C -40°C to +85°C 0°C to +70°C -40°C to +85°C 0°C to +70°C -40°C to +85°C 0°C to +70°C -40°C to +85°C 0°C to +70°C 0°C to +70°C -40°C to +85°C 0°C to +70°C 0°C to +70°C -40°C to +85°C 0°C to +70°C -40°C to +85°C 0°C to +70°C -40°C to +85°C 0°C to +70°C -40°C to +85°C 0°C to +70°C -40°C to +85°C 0°C to +70°C -40°C to +85°C 28 EDIP Module 28 EDIP Module 28 EDIP Module 34 PowerCap* 34 PowerCap* 34 PowerCap* 28 EDIP Module 28 EDIP Module 28 EDIP Module 28 EDIP Module 34 PowerCap* 34 PowerCap* 28 EDIP Module 28 EDIP Module 28 EDIP Module 34 PowerCap* 34 PowerCap* 34 PowerCap* 28 EDIP Module 28 EDIP Module 28 EDIP Module 28 EDIP Module 34 PowerCap* 34 PowerCap* PowerCap IND PowerCap IND DS1743-85 DS1743-100 DS1743-100-IND DS1743P-85 DS1743P-100 DS1743P-100 IND DS1743W-120 DS1743W-120 IND DS1743W-150 DS1743W-150 IND DS1743WP-120 DS1743WP-120 IND DS1743-85 DS1743-100 DS1743-100-IND DS1743P-85 DS1743P-100 DS1743P-100 IND DS1743W-120 DS1743W-120 IND DS1743W-150 DS1743W-150 IND DS1743WP-120 DS1743WP-120 IND DS9034PC DS9034PCI DS9034PC DS9034PCI +Denotes a lead Pb -free/RoHS-compliant package. DS9034PCX required must be ordered separately . *A ‘+’ indicates lead Pb -free. The top mark will include a ‘+’ symbol on lead Pb -free devices. The DS1743 is a full-function, year-2000-compliant Y2KC , real-time clock/calendar RTC and 8k x 8 nonvolatile static RAM. User access to all registers within the DS1743 is accomplished with a bytewide interface as shown in Figure The RTC information and control bits reside in the eight uppermost RAM locations. The RTC registers contain century, year, month, date, day, hours, minutes, and seconds data in 24-hour binary-coded decimal BCD format. Corrections for the day of the month and leap year are made automatically. The RTC clock registers are double buffered to avoid access of incorrect data that can occur during clock update cycles. The double-buffered system also prevents time loss as the timekeeping countdown continues unabated by access to time register data. The DS1743 also contains its own powerfail circuitry, which deselects the device when the VCC supply is in an out-of-tolerance condition. When VCC is above VPF, the device is fully accessible. When VCC is below VPF, the internal CE signal is forced high, preventing any access. When VCC rises above VPF, access remains inhibited for TREC, allowing time for the system to stabilize. These features prevent loss of data from unpredictable system operation brought on by low VCC as errant access and update cycles are avoided. 3 of 16 DS1743/DS1743P Y2K-Compliant, Nonvolatile Timekeeping RAMs PACKAGES

PDF Datasheet Preview

DS1743/DS1743P Y2K-Compliant, Nonvolatile Timekeeping

RAMs

PIN CONFIGURATIONS
• Integrated NV SRAM, Real-Time Clock,

Crystal, Power-Fail Control Circuit, and

TOP VIEW

Lithium Energy Source
• Clock Registers are Accessed Identically to
the Static RAM. These Registers Reside in
the Eight Top RAM Locations.
• Century Byte Register
• Totally Nonvolatile with Over 10 Years of

Operation in the Absence of Power
• BCD-Coded Century, Year, Month, Date,

Day, Hours, Minutes, and Seconds with

Automatic Leap Year Compensation Valid

N.C. A12

A7 A6 A5 A4 A3 A2 A1 A0 DQ0 DQ1 DQ2 GND
2 DS1743 27

VCC WE CE2 A8 A9 A11 OE A10 CE DQ7 DQ6 DQ5 DQ4 DQ3
through 2099
• Low-Battery-Voltage Level Indicator Flag
• Power-Fail Write Protection Allows for ±10%
28-Pin Encapsulated Package 28 PIN 740

VCC Power-Supply Tolerance
• Lithium Energy Source is Electrically

Disconnected to Retain Freshness Until Power is Applied for the First Time
• DIP Module Only Standard JEDEC Bytewide 8k x 8 Static

RAM Pinout
• PowerCap Module Board Only

Surface-Mountable Package for Direct Connection to PowerCap Containing Battery and Crystal

Replaceable Battery PowerCap Power-On Reset Output Pin-for-Pin Compatible with Other Densities

N.C.

N.C. N.C. RST VWCEC

OE CE DQ7 DQ6 DQ5 DQ4 DQ3

DQ2 DQ1 DQ0 GND

DS1743P
34 33
17 X1 GND VBAT X2 18

N.C.

N.C. N.C.

N.C. A12 A11 A10 A9 A8

A7 A6 A5 A4 A3 A2

A1 A0
34-Pin PowerCap Module Board

Uses DS9034PCX PowerCap
of DS174XP Timekeeping RAM
• Underwriters Laboratories UL Recognized
to Prevent Charging of the Internal Lithium

Battery
ORDERING INFORMATION

PART

TEMP RANGE PIN-PACKAGE

VOLTAGE V

TOP MARK**

DS1743-85 DS1743-100 DS1743-100 IND DS1743P-85 DS1743P-100 DS1743P-100IND DS1743W-120 DS1743W-120 IND DS1743W-150 DS1743W-150 IND DS1743WP-120 DS1743WP-120 IND DS1743-85+ DS1743-100+ DS1743-100 IND+ DS1743P-85+ DS1743P-100+ DS1743P-100IND+ DS1743W-120+ DS1743W-120 IND+ DS1743W-150+ DS1743W-150 IND+ DS1743WP-120+ DS1743WP-120 IND+ DS9034PCX DS9034I-PCX DS9034PCX+ DS9034I-PCX+
0°C to +70°C 0°C to +70°C -40°C to +85°C 0°C to +70°C 0°C to +70°C -40°C to +85°C 0°C to +70°C -40°C to +85°C 0°C to +70°C -40°C to +85°C 0°C to +70°C -40°C to +85°C 0°C to +70°C 0°C to +70°C -40°C to +85°C 0°C to +70°C 0°C to +70°C -40°C to +85°C 0°C to +70°C -40°C to +85°C 0°C to +70°C -40°C to +85°C 0°C to +70°C -40°C to +85°C 0°C to +70°C -40°C to +85°C 0°C to +70°C -40°C to +85°C
28 EDIP Module 28 EDIP Module 28 EDIP Module 34 PowerCap* 34 PowerCap* 34 PowerCap* 28 EDIP Module 28 EDIP Module 28 EDIP Module 28 EDIP Module 34 PowerCap* 34 PowerCap* 28 EDIP Module 28 EDIP Module 28 EDIP Module 34 PowerCap* 34 PowerCap* 34 PowerCap* 28 EDIP Module 28 EDIP Module 28 EDIP Module 28 EDIP Module 34 PowerCap* 34 PowerCap* PowerCap IND PowerCap IND

DS1743-85

DS1743-100

DS1743-100-IND

DS1743P-85

DS1743P-100

DS1743P-100 IND

DS1743W-120

DS1743W-120 IND

DS1743W-150

DS1743W-150 IND

DS1743WP-120

DS1743WP-120 IND

DS1743-85

DS1743-100

DS1743-100-IND

DS1743P-85

DS1743P-100

DS1743P-100 IND

DS1743W-120

DS1743W-120 IND

DS1743W-150

DS1743W-150 IND

DS1743WP-120

DS1743WP-120 IND

DS9034PC

DS9034PCI

DS9034PC

DS9034PCI
+Denotes a lead Pb -free/RoHS-compliant package. *DS9034PCX required must be ordered separately . **A ‘+’ indicates lead Pb -free. The top mark will include a ‘+’ symbol on lead Pb -free devices.

The DS1743 is a full-function, year-2000-compliant Y2KC , real-time clock/calendar RTC and 8k x 8 nonvolatile static RAM. User access to all registers within the DS1743 is accomplished with a bytewide interface as shown in Figure The RTC information and control bits reside in the eight uppermost RAM locations. The RTC registers contain century, year, month, date, day, hours, minutes, and seconds data in 24-hour binary-coded decimal BCD format. Corrections for the day of the month and leap year are made automatically. The RTC clock registers are double buffered to avoid access of incorrect data that can occur during clock update cycles. The double-buffered system also prevents time loss as the timekeeping countdown continues unabated by access to time register data. The DS1743 also contains its own powerfail circuitry, which deselects the device when the VCC supply is in an out-of-tolerance condition. When VCC is above VPF, the device is fully accessible. When VCC is below VPF, the internal CE signal is forced high, preventing any access. When VCC rises above VPF, access remains inhibited for TREC, allowing time for the system to stabilize. These features prevent loss of data from unpredictable system operation brought on by low VCC as errant access and update cycles are avoided.
3 of 16

DS1743/DS1743P Y2K-Compliant, Nonvolatile Timekeeping RAMs

PACKAGES

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Datasheet ID: DS90340I-PCX 647163