TPS3704数据手册集成电路（IC）的监控器规格书PDF

描述 Description

The TPS3704x is a low-power precision window or standard voltage supervisor that can be configured as a quad, triple, dual, or single channel. Each channel has a threshold accuracy of ±1% in an 8-pin (1.6 mm x 2.9 mm) SOT-23 package offering a small solution size. The TPS3704x includes a very accurate threshold detection, with high resolution, that is ideal for systems that operate on low-voltage supply rails and have narrow margin supply tolerances. Built-in low threshold hysteresis and a fixed reset delay (tD options from 20 µs to 1200 ms) prevent false reset signals when monitoring multiple voltage rails.

The TPS3704x does not require any external resistors for setting the over- and undervoltage reset thresholds, which further optimizes overall high accuracy, cost, solution size, and improves reliability for safety systems. The TPS3704x functional safety compliance elevates industrial design that can meet IEC 61508 and 60730 requirements and safety integrity levels (SIL).

Separate VDD and SENSEx pins allow monitoring of rail voltages other than VDD or can be used as a push-button input. Optional use of external resistors are supported by the SENSEx pins. Each channel on the TPS3704x can be customized to its own over- and undervoltage window detection with an upper and lower threshold tolerance that can be symmetric or asymmetric.

特性 Features

Designed for high performance and safety:
• Input current (4 channels): IDD = 20 µA (maximum)
• High threshold accuracy: ±1% (maximum)
• Built-in precision hysteresis: VHYS (VIT > 800 mV) = 0.75% (typical)
• Functional Safety-Compliant targeted
• Developed for functional safety applications
• Documentation to aid IEC 61508 system design will be available upon production release
• Systematic capability up to SIL D targeted
• Hardware capability up to SIL A targeted

Designed for a wide range of applications:
• Quad, triple, dual, or single voltage supervisor
• TPS37044, 3, 2, 1: 4, 3, 2, 1 - channels

• Input voltage range, VDD = 1.7 V to 5.5 V
• (UV / OV) threshold accuracy: ±0.25% (typical)
• Window (OV, UV): UV and OV - only options
• Window tolerance: ±3% to ±11%
• High threshold resolution: VIT ≤ 0.8 V: 20 mV steps VIT > 0.8 V: lower of 0.5% or 20 mV steps

• Push-button monitor on all channels
• Reset time delay (tD): fixed time delay options
• Options: 23-fixed time options ranging from 20 µs (minimum) to 1200 ms (maximum)

• Temperature range: –40°C to +125°C
Multiple output topologies, package type:
• TPS3704xxxO: open-drain, active-low (RESET)
• TPS3704xxxL: push-pull, active-low (RESET)
• TPS3704xxxH: push-pull, active-high (RESET)
• Package: 1.6-mm x 2.9-mm DDF (SOT-23 8-pin)