CAT1026WI-25-T3 ON Semiconductor, CAT1026WI-25-T3 Datasheet

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CAT1026WI-25-T3

Manufacturer Part Number
CAT1026WI-25-T3
Description
IC SUPERVISOR W/MEM 2.55V 8SOIC
Manufacturer
ON Semiconductor
Type
Multi-Voltage Supervisorr
Datasheet

Specifications of CAT1026WI-25-T3

Number Of Voltages Monitored
2
Output
Open Drain or Open Collector
Reset
Active High/Active Low
Reset Timeout
130 ms Minimum
Voltage - Threshold
2.55V, Adj
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
8-SOIC (3.9mm Width)
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
1026WI-25-T3
CAT1026WI-25-T3TR
Dual Voltage Supervisory Circuits with
I²C Serial 2k-bit CMOS EEPROM
FEATURES
DESCRIPTION
The CAT1026 and CAT1027 are complete memory
and supervisory solutions for microcontroller-based
systems. A 2k-bit serial EEPROM memory and a
system power supervisor with brown-out protection
are integrated together in low power CMOS techno–
logy. Memory interface is via a 400 kHz I
The CAT1026 and CAT1027 provide a precision V
sense circuit with five reset threshold voltage options
that support 5 V, 3.3 V and 3 V systems. The power
© 2009 SCILLC. All rights reserved.
Characteristics subject to change without notice
For Ordering Information details, see page 19.
— 5 V, 3.3 V and 3 V systems
— Five threshold voltage options
— Externally adjustable down to 1.25 V
— Valid reset guaranteed at V
— TDFN max height is 0.8 mm
Precision V
Additional voltage monitoring
Watchdog timer (CAT1027 only)
Active High or Low Reset
400 kHz I
2.7 V to 5.5 V Operation
Low power CMOS technology
16-Byte Page Write Buffer
Built-in inadvertent write protection
1,000,000 Program/Erase cycles
Manual Reset capability
100 year data retention
Industrial and extended temperature ranges
8-pin DIP, SOIC, TSSOP, MSOP or TDFN
(3 x 3 mm foot-print) packages
2
C Bus
CC
Power Supply Voltage Monitor
CC
= 1 V
2
C bus.
CC
1
supply monitor and reset circuit protects memory and
systems controllers during power up/down and
against brownout conditions. If power supply voltages
are out of tolerance reset signals become active
preventing the system microcontroller, ASIC, or
peripherals from operating.
The CAT1026 features two open drain reset outputs:
one (RESET) drives high and the other (RESET
drives low whenever V
Reset outputs become inactive typically 200ms after
the supply voltage exceeds the reset threshold value.
With both active high and low reset signals, interface
to microcontrollers and other ICs is simple. CAT1027
has only a RESET
can be used as an input for push-button manual reset
capability.
The CAT1026 and CAT1027 provide an auxiliary
voltage sensor input, V
second system supply. The auxiliary high impedance
comparator drives the open drain output, V
whenever the sense voltage is below 1.25 V threshold.
The CAT1027 is designed with a 1.6 second
watchdog timer circuit that resets a system to a known
state if software or a hardware glitch halts or “hangs”
the system. The CAT1027 features a watchdog timer
interrupt input, WDI.
The on-chip 2k-bit EEPROM memory features a 16-byte
page. In addition, hardware data protection is provided
by a V
whenever V
reaches the reset threshold during power up.
Available packages include 8-pin DIP and surface
mount, 8-pin SO, 8-pin TSSOP, 8-pin TDFN and 8-pin
MSOP packages. The TDFN package thickness is
0.8 mm maximum. TDFN footprint is 3 x 3 mm.
CC
sense circuit that prevents writes to memory
¯¯¯¯¯¯ output. In addition, the RESET
CC
falls below the reset threshold or until V
CAT1026, CAT1027
SENSE
CC
, which is used to monitor a
falls below the threshold.
Doc. No. MD-3010 Rev. P
¯¯¯¯¯¯ pin
¯¯¯¯¯¯ )
LOW
CC
,

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CAT1026WI-25-T3 Summary of contents

Page 1

Dual Voltage Supervisory Circuits with I²C Serial 2k-bit CMOS EEPROM FEATURES Precision V Power Supply Voltage Monitor CC — 3.3 V and 3 V systems — Five threshold voltage options Additional voltage monitoring — Externally adjustable down to ...

Page 2

CAT1026, CAT1027 BLOCK DIAGRAM EXTERNA L LOAD V CC WORDADDRESS V SS START/STOP SDA LOGIC CONTR OL LOGIC V CC Monitor RESET Controller - V REF AuxiliaryVoltage Monitor RESET (CAT1026) V SENSE + V LOW - V ...

Page 3

PIN DESCRIPTION : RESET OUTPUTs ¯¯¯¯¯¯ RESET/RESET (RESET CAT1026 Only) ¯¯¯¯¯¯ can be used These are open drain pins and RESET as a manual reset trigger input. By forcing a reset condition on the pin the device will initiate and ...

Page 4

CAT1026, CAT1027 ABSOLUTE MAXIMUM RATINGS Parameters Temperature Under Bias Storage Temperature Voltage on any Pin with Respect to Ground V with Respect to Ground CC Package Power Dissipation Capability (T Lead Soldering Temperature (10 s) (3) Output Short Circuit Current ...

Page 5

CAPACITANCE T = 25º 1.0 MHz Symbol Test (1) C Output Capacitance OUT (1) C Input Capacitance IN AC CHARACTERISTICS 5.5 V and over the recommended temperature ...

Page 6

CAT1026, CAT1027 VOLTAGE MONITOR AND RESET CIRCUIT AC CHARACTERISTICS Symbol Parameter t Reset Timeout PURST RESET Output Delay RDP Glitch Reject Pulse Width GLITCH CC t Watchdod Timeout Delay ...

Page 7

DEVICE OPERATION Reset Controller Description The CAT1026 and CAT1027 precision RESET controllers ensure correct system operation during brownout and power up/down conditions. They are configured with open drain RESET outputs. During power-up, the RESET outputs remain active until V reaches ...

Page 8

CAT1026, CAT1027 Figure 1. RESET Output Timing RVALID t V PURST CC RESE T RESE T Figure 2: Auxiliary Voltage Monitor Timing V REF V SENSE V LOW Figure 3: Auxiliary Voltage Monitor Externally adjustable threshold V ...

Page 9

EMBEDDED EEPROM OPERATION The CAT1026 and CAT1027 feature a 2-kbit embedded serial EEPROM that supports the I transmission protocol. This Inter-Integrated Circuit Bus protocol defines any device that sends data to the bus transmitter and any device ...

Page 10

CAT1026, CAT1027 ACKNOWLEDGE After a successful data transfer, each receiving device is required to generate an acknowledge. The acknowledging device pulls down the SDA line during the ninth clock cycle, signaling that it received the 8 bits of data. The ...

Page 11

Page Write The CAT1026 and CAT1027 write bytes of data in a single write cycle, using the Page Write operation. The page write operation is initiated in the same manner as the byte write operation, however instead ...

Page 12

CAT1026, CAT1027 Acknowledge Polling Disabling of the inputs can be used to take advantage of the typical write cycle time. Once the stop condition is issued to indicate the end of the host’s write opration, the CAT1026 and CAT1027 initiates ...

Page 13

Immediate/Current Address Read The CAT1026 and CAT1027 address counter contains the address of the last byte accessed, incremented by one. In other words, if the last READ or WRITE access was to address N, the READ immediately following would access ...

Page 14

CAT1026, CAT1027 PACKAGE OUTLINE DRAWINGS (1)(2) PDIP 8-Lead 300 mils (L) PIN # 1 IDENTIFICATION D TOP VIEW SIDE VIEW Notes: (1) All dimensions are in millimeters. (2) Complies with JEDEC MS-001. Doc. No. MD-3010 Rev. P ...

Page 15

SOIC 8-Lead 150 mils (W) PIN # 1 IDENTIFICATION TOP VIEW SIDE VIEW Notes: (1) All dimensions are in millimeters. Angles in degrees. (2) Complies with JEDEC MS-012. © 2009 SCILLC. All rights reserved. Characteristics subject ...

Page 16

CAT1026, CAT1027 (1)(2) TSSOP 8-Lead ( TOP VIEW D SIDE VIEW Notes: (1) All dimensions are in millimeters. Angles in degrees. (2) Complies with JEDEC MO-153 Doc. No. MD-3010 Rev. P SYMBOL ...

Page 17

MSOP 8-Lead ( TOP VIEW SIDE VIEW Notes: (1) All dimensions are in millimeters. Angles in degrees. (2) Complies with JEDEC MO-187. © 2009 SCILLC. All rights reserved. Characteristics subject to change ...

Page 18

CAT1026, CAT1027 (1)(2) TDFN 8-Pad (ZD4) D PIN#1 INDEX AREA TOP VIEW SYMBOL MIN NOM A 0.70 0.75 A1 0.00 0.02 A3 0.20 REF b 0.23 0.30 D 2.90 3.00 D2 2.20 — E 2.90 3.00 ...

Page 19

... All packages are RoHS-compliant (Lead-free, Halogen-free). (2) The standard lead finish is NiPdAu. (3) The device used in the above example is a CAT1026WI-30-GT3 (SOIC, Industrial Temperature, 3.0 - 3.15 V, NiPdAu, Tape & Reel, 3,000/Reel). (4) For additional package and temperature options, please contact your nearest ON Semiconductor Sales office. ...

Page 20

... Update Example of Ordering Information Update Package Outline Drawings 11/28/2007 M Update Example of Ordering Information Add “MD-“ to document number 7-Nov-08 N Change logo and fine print to ON Semiconductor 05-Mar-09 O Update Ordering Information (Remove 2,000/Reel) 14-Jul-09 P Update Ordering Information table ON Semiconductor and are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice to any products herein ...

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