SNVSCF5A June   2023  – December 2023 TPS35

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Device Comparison
  6. 5 Pin Configuration and Functions
  7. 6 Specifications
    1. 6.1  Absolute Maximum Ratings
    2. 6.2  ESD Ratings
    3. 6.3  Recommended Operating Conditions
    4. 6.4  Thermal Information
    5. 6.5  Thermal Information
    6. 6.6  Electrical Characteristics
    7. 6.7  Timing Requirements
    8. 6.8  Switching Characteristics
    9. 6.9  Timing Diagrams
    10. 6.10 Typical Characteristics
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagrams
    3. 7.3 Feature Description
      1. 7.3.1 Voltage Supervisor
      2. 7.3.2 Timeout Watchdog Timer
        1. 7.3.2.1 tWD Timer
        2. 7.3.2.2 Watchdog Enable Disable Operation
        3. 7.3.2.3 tSD Watchdog Start Up Delay
        4. 7.3.2.4 SET Pin Behavior
      3. 7.3.3 Manual RESET
      4. 7.3.4 RESET and WDO Output
    4. 7.4 Device Functional Modes
  9. 8 Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1 Output Assert Delay
        1. 8.1.1.1 Factory-Programmed Output Assert Delay Timing
        2. 8.1.1.2 Adjustable Capacitor Timing
      2. 8.1.2 Watchdog Timer Functionality
        1. 8.1.2.1 Factory-Programmed Timing Options
        2. 8.1.2.2 Adjustable Capacitor Timing
    2. 8.2 Typical Applications
      1. 8.2.1 Design 1: Monitoring a Microcontroller Supply Voltage and Watchdog Timer
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
          1. 8.2.1.2.1 Setting the Voltage Threshold
          2. 8.2.1.2.2 Meeting the Watchdog Timeout Period
          3. 8.2.1.2.3 Setting the Reset Delay
          4. 8.2.1.2.4 Setting the Startup Delay and Output Topology
          5. 8.2.1.2.5 Calculating the RESET Pullup Resistor
    3. 8.3 Power Supply Recommendations
    4. 8.4 Layout
      1. 8.4.1 Layout Guidelines
      2. 8.4.2 Layout Example
  10. 9 Device and Documentation Support
    1. 9.1 Receiving Notification of Documentation Updates
    2. 9.2 Support Resources
    3. 9.3 Trademarks
    4. 9.4 Electrostatic Discharge Caution
    5. 9.5 Glossary
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

5 Pin Configuration and Functions

GUID-20210630-CA0I-QJPJ-GGTW-VML89JL3BFT0-low.svgFigure 5-1 Pin Configuration Option A
DDF Package, 8-Pin SOT-23,
TPS35 Top View
GUID-20210630-CA0I-QB3N-JCB7-3CZPPD31LPJX-low.svgFigure 5-3 Pin Configuration Option C
DDF Package, 8-Pin SOT-23,
TPS35 Top View
GUID-20220913-SS0I-W13W-LWWC-HRDWTGXJMG0X-low.svgFigure 5-5 Pin Configuration Option J
DSE Package, 6-Pin WSON,
TPS35 Top View
GUID-20210630-CA0I-08RM-BC36-BJPP13DHFRN7-low.svgFigure 5-2 Pin Configuration Option B
DDF Package, 8-Pin SOT-23,
TPS35 Top View
GUID-20210630-CA0I-KCHL-TNFG-6XS1K8BTWC5N-low.svgFigure 5-4 Pin Configuration Option D
DDF Package, 8-Pin SOT-23,
TPS35 Top View
GUID-20220913-SS0I-WRRK-4GCV-WPLMKRR57W0B-low.svgFigure 5-6 Pin Configuration Option K
DSE Package, 6-Pin WSON,
TPS35 Top View
Table 5-1 Pin Functions
PIN NAME PIN NUMBER I/O DESCRIPTION
PINOUT A PINOUT B PINOUT C PINOUT D PINOUT J PINOUT K
CRST 3 3 — — — 2 I Programmable reset timeout pin. Connect a capacitor between this pin and GND to program the reset timeout period. See Section 7.3.4 for more details.
CWD 2 2 — — — 1 I Programmable watchdog timeout input. Watchdog timeout is set by connecting a capacitor between this pin and ground. See Section 7.3.2.1 for more details.
GND 4 4 4 4 4 4 — Ground pin
MR 1 — 2 — — — I Manual reset pin. A logic low on this pin asserts the RESET. See Section 7.3.3 for more details.
RESET 7 7 7 7 5 5 O Reset output. Connect RESET to VDD using a pull up resistance when using open drain output. RESET is asserted when the voltage at the VDD pin goes below the undervoltage threshold (VIT-) or MR pin is driven LOW. For pinout options which do not support independent WDO pin, RESET is also asserted for watchdog error. See Section 7.3.4 for more details.
SET0 5 1 1 1 1 — I Logic input. SET0, SET1, and WD-EN pins select the watchdog and enable-disable the watchdog; see Section 7.3.2.4 for more details.
SET1 — 5 5 5 — — I Logic input. SET0, SET1, and WD-EN pins select the watchdog and enable-disable the watchdog; see Section 7.3.2.4 for more details.
VDD 8 8 8 8 6 6 I Supply voltage pin. For noisy systems, connecting a 0.1-µF bypass capacitor is recommended.
WD-EN — — 6 2 2 — I Logic input. Logic high input enables the watchdog monitoring feature. See Section 7.3.2.2 for more details.
WDI 6 6 3 3 3 3 I Watchdog input. A falling transition (edge) must occur at this pin before the timeout expires in order for RESET / WDO to not assert. See Section 7.3.2 for more details.
WDO — — — 6 — — O Watchdog output. Connect WDO to VDD using pull up resistance when using open drain output. WDO asserts when a watchdog error occurs. WDO only asserts when RESET is high. When a watchdog error occurs, WDO asserts for the set RESET timeout delay (tD). When RESET is asserted, WDO is deasserted and watchdog functionality is disabled. See Section 7.3.4 for more details.