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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Supervisors

STMicroelectronics TS834-5IDT

Name: TS834-5IDT
Brand: STMicroelectronics
SKU: TS834-5IDT
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TS834-5IDT

Manufacturer:: STMicroelectronics

Category:: Supervisors

Package:: 8-SOIC (0.154", 3.90mm Width)

Datasheet:: TS834-5IDT.pdf

Description:: IC SUPERVISOR 1 CHANNEL 8SO

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Product details

Overview

TS834-5IDT from STMicroelectronics is a micropower voltage supervisor IC providing dual active-high and active-low reset outputs, integrated reset timer with disable function, 4.33V precision threshold (±130mV over −40°C to +85°C), guaranteed operation down to 1.5V supply, and 20µs response time under 10mV overdrive - used in microcontroller power monitoring and brown-out detection circuits.

For engineers reviewing the TS834-5IDT datasheet, TS834-5IDT pinout, TS834-5IDT application, or TS834-5IDT equivalent, key selection criteria include reset threshold accuracy, dual-output polarity support, timer enable/disable control via dedicated pin, open-drain output drive capability (450mV @ 8mA), and ultra-low 12µA quiescent current at 5V.

Technical Context

The TS834-5IDT integrates a thermally matched resistor network for stable 4.33V threshold, a high-stability bandgap reference, and a comparator with 100mV internal hysteresis to prevent noise-induced false resets. Its dual outputs are independently configured: one active-low open-drain (RESETL), one active-high push-pull (RESETH).

Timer control is implemented via a dedicated pin (Pin 5) that enables a 125–500ms reset pulse when tied to V_CC, or disables timing (instantaneous reset assertion) when grounded. The device operates across 1.5V–5.5V supply and −40°C to +85°C ambient temperature.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage Range	1.5V to 5.5V - supports wide-input microcontroller power rails including 3.3V and 5V systems
Reset Threshold (V_THI)	4.33V typ., 4.10–4.46V min/max - precision voltage monitoring with ±130mV tolerance over full temperature range
Quiescent Current	12µA max @ V_CC = 5V - enables battery-backed or energy-harvesting applications
Response Time	20µs @ 10mV overdrive - ensures fast fault detection before system state corruption
Output Type	Active-low open-drain (RESETL), active-high push-pull (RESETH) - allows flexible interface with diverse logic families and pull-up configurations
Reset Pulse Width	125–500ms (timer enabled) - provides configurable hold time for reliable processor initialization
Hysteresis	100mV typ. - suppresses chatter during slow or noisy V_CC transitions

Pinout & Package

TS834-5IDT is supplied in an 8-pin SO (Small Outline) plastic micropackage (SO8), with standard 1.27mm lead pitch and 5.0mm × 6.2mm body dimensions per STMicroelectronics mechanical drawing.

Pin/Terminal	Circuit Role	Design Meaning
1	RESETL (Active-Low Output)	Open-drain output asserted low during reset; requires external pull-up for logic-level compatibility
2	V_CC	Main power supply input (1.5–5.5V); powers internal reference, comparator, and output stages
3	NC	No internal connection; must be left unconnected or tied to GND for mechanical stability
4	GND	Ground reference for all internal circuitry and output return path
5	Timer Control	Logic-level input: connect to V_CC to enable 125–500ms reset pulse; connect to GND for immediate reset assertion
6	RESETH (Active-High Output)	Push-pull output asserted high during reset; directly drives TTL/CMOS inputs without pull-up
7	NC	No internal connection; must be left unconnected or tied to GND
8	NC	No internal connection; must be left unconnected or tied to GND

Key Features

Feature	Design Value
Dual-polarity reset outputs	Simultaneous active-high (push-pull) and active-low (open-drain) signals simplify interface with mixed-logic systems
Programmable reset timer	Single-pin control (Pin 5) selects between timed (125–500ms) or instantaneous reset assertion
Ultra-low supply current	12µA max at 5V enables >10-year battery life in always-on supervisory applications
Guaranteed operation down to 1.5V	Ensures valid reset assertion during deep brown-out conditions before MCU core fails
100mV internal hysteresis	Eliminates need for external hysteresis components and improves noise immunity on noisy power rails

Applications

Industrial PLC Power Monitoring

Embedded Microcontroller Boot Supervision

Use Scenario: Monitoring 5V auxiliary rail in programmable logic controllers during cold start and line sags.

IC Role / Device Role / Timing Role: Voltage supervisor asserting both RESETH and RESETL to hold CPU and peripheral ICs in reset until stable 5V is confirmed.

Use Value: 4.33V threshold aligns precisely with 5V ±5% system spec; 100mV hysteresis prevents chatter during 4.7–4.9V recovery transients.

Use Scenario: Ensuring clean boot sequence for ARM Cortex-M0+ MCU powered from switching regulator with ripple.

IC Role / Device Role / Timing Role: Dual-output supervisor driving MCU's nRESET (via RESETL) and FPGA configuration controller's RESET_N (via RESETH).

Use Value: Open-drain RESETL allows shared reset bus with pull-up to 3.3V; push-pull RESETH eliminates external level shifter for 5V-tolerant peripherals.

Smart Meter Power-Fail Detection

Medical Sensor Node Brown-Out Protection

Use Scenario: Detecting AC mains loss in electricity meters to trigger backup SRAM save and real-time clock hold.

IC Role / Device Role / Timing Role: Supervisor triggering controlled shutdown via Timer Control pin tied to V_CC to generate 300ms reset pulse for firmware execution window.

Use Value: 12µA quiescent current extends supercapacitor hold-up time; 1.5V minimum operation ensures reset remains valid until backup power depletes.

Use Scenario: Protecting wearable ECG sensor node during coin-cell battery discharge below 2.2V.

IC Role / Device Role / Timing Role: Reset generator disabling analog front-end and BLE radio when main 3.3V LDO drops below 4.33V threshold.

Use Value: Guaranteed 4.10–4.46V threshold range ensures deterministic reset before ADC reference collapse; 20µs response captures fast dips.

Equivalent & Alternatives

The following parts are listed as comparable options for similar voltage supervisor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MAX809TRD2T	Single active-low output only; no active-high output or timer control; 2.93V fixed threshold	Lacks dual-output flexibility and programmable timing; suited only for basic reset-only use cases	Select when only simple, low-cost reset signaling is required and 2.93V threshold matches system needs
TPS3808G33DBVR	Adjustable threshold via external resistor divider; 3.3V nominal; includes manual reset input; 2.5µA typical I_CC	Requires external components for threshold setting; adds manual reset functionality not present in TS834-5IDT	Select when threshold customization or user-initiated reset is needed, and ultra-low I_CC is critical

Compared with MAX809TRD2T and TPS3808G33DBVR, TS834-5IDT uniquely delivers dual-polarity outputs and pin-controlled reset timing in a single SO8 package - eliminating board space and BOM count overhead of discrete logic or multiple supervisors.

Availability

TS834-5IDT is available at Aetrix Electronics and suitable for industrial PLC power monitoring, embedded microcontroller boot supervision, and smart meter power-fail detection requiring stable component supply and long-term lifecycle assurance.

Supply support for TS834-5IDT includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, designing and manufacturing analog, microcontroller, power, and sensing solutions for industrial, automotive, and consumer markets.

The TS834 belongs to ST's voltage supervisor product line, engineered specifically for reliable power sequencing and brown-out protection in resource-constrained embedded systems where low power, precision threshold, and dual-output flexibility are essential.

FAQ

What is the function of Pin 5 (Timer Control) on the TS834-5IDT?

Pin 5 determines reset pulse behavior: connecting it to V_CC enables the internal timer, generating a 125–500ms reset pulse; connecting it to GND disables timing, causing immediate and sustained reset assertion while V_CC remains below threshold. This pin has no internal pull-up or pull-down and must be externally biased.

Can TS834-5IDT operate reliably at 3.3V supply voltage?

Yes - TS834-5IDT operates across 1.5V to 5.5V, and its 4.33V threshold remains valid at 3.3V supply. However, the reset condition occurs when V_CC falls below 4.33V, so at 3.3V it will assert reset continuously. It is intended for monitoring higher rails (e.g., 5V) in systems also using 3.3V logic.

Does TS834-5IDT require external components for basic operation?

No external components are required for core supervision: the threshold is factory-trimmed, hysteresis is internal, and outputs are self-contained. An external pull-up resistor is needed only for the open-drain RESETL output. No capacitors, resistors, or diodes are necessary for power-on reset or brown-out detection.

How does the 100mV hysteresis improve system reliability?

The 100mV hysteresis creates a 4.23V lower threshold (V_THD) during V_CC recovery, preventing oscillatory reset toggling when supply voltage rises slowly or exhibits ripple near the 4.33V trip point - a common cause of failed MCU initialization in noisy industrial environments.

TS834-5IDT Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: 8-SOIC (0.154", 3.90mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Active

Programmable:: Not Verified

Type:: Simple Reset/Power-On Reset

Number of Voltages Monitored:: 1

Voltage - Threshold:: 4.33V

Output:: Open Drain or Open Collector

Reset:: Active High/Active Low

Reset Timeout:: 125ms Minimum

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 8-SOIC

TS834-5IDT FAQ

1.How can I place an order for TS834-5IDT through Aetrix?

Please submit a Request for Quotation (RFQ) for TS834-5IDT on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for TS834-5IDT reliable?

The price and inventory of TS834-5IDT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TS834-5IDT is usually 5 days.

3.What payment methods are accepted for TS834-5IDT?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TS834-5IDT transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TS834-5IDT?

TS834-5IDT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TS834-5IDT order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for TS834-5IDT?

For technical support, including TS834-5IDT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TS834-5IDT requirements.

6.How does Aetrix verify that TS834-5IDT is sourced from the original manufacturer or authorized distributors?

All TS834-5IDT products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TS834-5IDT meets industry standards.

7.What is the process for return or replacement of TS834-5IDT?

All TS834-5IDT units undergo pre-shipment inspection (PSI). If there is an issue with TS834-5IDT, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The TS834-5IDT part is unused and in its original packaging.

Return procedure for TS834-5IDT:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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