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

STMicroelectronics TS834-5IPT

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

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Part No.:: TS834-5IPT

Manufacturer:: STMicroelectronics

Category:: Supervisors

Package:: 8-TSSOP (0.173", 4.40mm Width)

Datasheet:: TS834-5IPT.pdf

Description:: IC SUPERVISOR 1 CHANNEL 8TSSOP

Quantity:: RFQ Add To RFQ list

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Inventory:4,209

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Product details

Overview

TS834-5IPT 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 with 10mV overdrive - used in microcontroller power monitoring and brown-out detection circuits.

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

Technical Context

The TS834-5IPT integrates a thermally matched resistor divider and bandgap reference to deliver stable 4.33V threshold with 100mV hysteresis, ensuring noise immunity during supply transients. Its comparator drives two independent open-drain outputs - one active-low (RESET) and one active-high (RESET̅) - both functional across 1.5V–5.5V V_CC.

Timer control is implemented via a dedicated pin: tied to V_CC enables a 125–500ms reset pulse width; tied to GND disables timing for immediate assertion. Response time remains fixed at 20µs (10mV overdrive, R_L=10kΩ, C_L=15pF), independent of supply voltage within operating range.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Range	1.5V to 5.5V - supports wide-input microcontroller systems including 1.8V, 3.3V, and 5V rails
Threshold Voltage	4.33V typ., 4.10–4.46V min/max over −40°C to +85°C - precise brown-out detection for 5V logic
Quiescent Current	12µA max @ V_CC = 5V - enables battery-backed or energy-harvesting applications
Output Type	Open-drain RESET and push-pull RESET̅ - allows flexible pull-up configuration and direct interface to diverse logic families
Response Time	20µs @ 10mV overdrive - fast reaction to supply dips without false triggering
Hysteresis	100mV typ. - prevents oscillation near threshold during slow-rising/falling V_CC
Reset Pulse Width	125–500ms (timer enabled); immediate (timer disabled) - configurable hold time for processor initialization

Pinout & Package

TSSOP8 package: 3.0mm × 4.4mm body, 0.65mm pitch, 1.05mm height, lead-free, RoHS-compliant.

Pin/Terminal	Circuit Role	Design Meaning
1	RESET (active-low)	Open-drain output asserted low when V_CC < V_THD; requires external pull-up
2	V_CC	Positive supply input (1.5–5.5V); powers internal reference and comparator
3	NC	No internal connection - must remain unconnected
4	GND	Ground reference for all internal circuitry and output sinks
5	RESET̅ (active-high)	Push-pull output asserted high when V_CC < V_THD; no external pull-up needed
6	NC	No internal connection - must remain unconnected
7	NC	No internal connection - must remain unconnected
8	Timer Control	Logic input: connect to V_CC to enable 125–500ms reset pulse; connect to GND for immediate reset

Key Features

Feature	Design Value
Dual-polarity reset outputs	Simultaneous active-low (open-drain) and active-high (push-pull) signals simplify interface to mixed-logic systems
Programmable reset timer	External pin-selectable between timed (125–500ms) and instantaneous reset modes - no external components required
Ultra-low supply current	12µA max at 5V enables >10-year battery life in coin-cell-powered supervisory applications
Guaranteed operation to 1.5V	Valid reset assertion even during deep brown-out - critical for safe MCU shutdown before data corruption
Thermally matched threshold	4.33V ±130mV over full temperature range ensures consistent trip point without calibration

Applications

Computer Power Monitoring

Industrial Microcontroller Supervision

Use Scenario: Monitoring ATX or embedded 5V rail during power-up and brown-out events in PC motherboards and SBCs.

IC Role / Device Role / Timing Role: Voltage supervisor generating synchronized active-low and active-high reset pulses to initialize CPU, memory, and peripherals.

Use Value: 4.33V threshold matches standard 5V tolerance; 20µs response prevents glitch-induced boot failure; timer disable allows clean cold-start sequencing.

Use Scenario: Ensuring reliable restart after voltage sag in PLC I/O modules powered from 24V-to-5V DC/DC converters.

IC Role / Device Role / Timing Role: Dual-output supervisor asserting reset to ARM Cortex-M MCU and FPGA configuration logic upon undervoltage.

Use Value: 1.5V minimum operating voltage guarantees reset assertion even during severe input droop; TSSOP8 footprint saves PCB space in dense industrial layouts.

Smart Meter Power Fail Detection

Medical Instrument Backup Power Handover

Use Scenario: Detecting AC mains loss in electricity meters to trigger EEPROM save and switch to supercapacitor backup.

IC Role / Device Role / Timing Role: Low-power supervisor enabling immediate nonvolatile data preservation and controlled shutdown sequence.

Use Value: 12µA quiescent current extends supercapacitor hold-up time; 100mV hysteresis rejects line noise during marginal AC conditions.

Use Scenario: Managing seamless transition from main power to battery backup in portable diagnostic devices during unplanned disconnect.

IC Role / Device Role / Timing Role: Precision threshold detector initiating backup power activation and halting high-power subsystems before voltage collapse.

Use Value: Guaranteed 4.33V trip point aligns with Li-ion battery protection thresholds; dual outputs coordinate MCU reset and analog front-end power gating.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MAX6326–43D	Single active-low output; no active-high output; fixed 4.3V threshold; 1.2µA I_CC	Lacks dual-output flexibility; better for ultra-low-power single-rail systems only	Select if only active-low reset is needed and sub-µA current is mandatory
TPS3808G33	Adjustable threshold via external resistor; 1.9µA I_CC; no active-high output; 200ms fixed delay	Requires external resistor network; lacks polarity flexibility; fixed timing vs programmable timer	Select if threshold tuning is required and TSSOP8 compatibility is acceptable

Compared with MAX6326–43D and TPS3808G33, the TS834-5IPT uniquely delivers simultaneous active-high/low outputs and pin-selectable timer functionality in a single TSSOP8 package - eliminating need for external logic or dual ICs in systems requiring coordinated reset signaling.

Availability

TS834-5IPT is available at Aetrix Electronics and suitable for computer power monitoring, industrial microcontroller supervision, and smart meter power fail detection requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for TS834-5IPT 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 silicon solutions for automotive, industrial, and consumer markets with emphasis on reliability and energy efficiency.

The TS834 belongs to ST's voltage supervisor product line, engineered specifically for robust power-on reset and brown-out protection in resource-constrained embedded systems where dual-output signaling and ultra-low power are essential.

FAQ

What is the function of Pin 8 (Timer Control) on the TS834-5IPT?

Pin 8 determines reset pulse behavior: connecting it to V_CC enables a 125–500ms reset pulse width (temperature-dependent), while connecting it to GND forces immediate reset assertion without delay. This pin has no internal pull-up or pull-down and must be externally biased - floating is undefined and prohibited.

Can the TS834-5IPT operate reliably at 1.8V supply?

Yes - the TS834-5IPT guarantees correct reset assertion down to 1.5V V_CC, making it fully functional at 1.8V. At this voltage, the 4.33V threshold is not active, but the device remains powered and monitors for rising V_CC crossing its trip point during power-up sequences.

Is the active-high RESET̅ output truly push-pull, and what are its drive limits?

Yes - RESET̅ is a true push-pull output capable of sourcing up to 1000nA (max) and sinking sufficient current to drive standard CMOS inputs directly. It does not require an external pull-up resistor and is rated for 5.5V absolute maximum output voltage, matching V_CC rail tolerance.

How does the 100mV hysteresis improve system reliability?

The 100mV hysteresis creates a 4.23V–4.33V window between turn-on and turn-off thresholds, preventing rapid toggling during slow or noisy V_CC transitions - especially critical during power-up, brown-out recovery, or ripple-limited DC/DC output conditions where marginal voltage stability occurs.

TS834-5IPT Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: 8-TSSOP (0.173", 4.40mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

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-TSSOP

TS834-5IPT FAQ

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

Please submit a Request for Quotation (RFQ) for TS834-5IPT 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 TS834-5IPT reliable?

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

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

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

Note: Certain payment methods may incur a processing fee.

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

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

Once your TS834-5IPT 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 TS834-5IPT?

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

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

All TS834-5IPT 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 TS834-5IPT meets industry standards.

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

All TS834-5IPT units undergo pre-shipment inspection (PSI). If there is an issue with TS834-5IPT, 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 TS834-5IPT part is unused and in its original packaging.

Return procedure for TS834-5IPT:

1.Submit a request within 90 days.

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

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