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Texas Instruments TPS3610T50PW
- Part No.:
- TPS3610T50PW
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TPS3610T50PW.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:111
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Product details
Overview
TPS3610T50PW from Texas Instruments is a precision 5-V supply-voltage supervisory IC with integrated battery switchover, watchdog timer (800 ms timeout), power-fail comparator, and chip-enable gating. It monitors VDD for reset assertion at 4.46–4.64 V threshold, provides active-low RESET with 100-ms delay, and supports backup-battery operation up to 5.5 V. Used in portable battery-powered equipment and computer systems requiring reliable data retention during brownout.
For engineers reviewing the TPS3610T50PW datasheet, TPS3610T50PW pinout, TPS3610T50PW application, or TPS3610T50PW equivalent, this page delivers verified technical context, exact pin functions, real-world use cases, and validated alternative options - all grounded in TI's SLVS327B datasheet and characterized operating conditions.
Technical Context
The TPS3610T50PW implements dual-supply supervision with independent VDD and VBAT monitoring, enabling automatic switchover to backup battery when VDD falls below 4.46 V (typical). Its internal 1.15-V reference drives both the power-fail comparator (PFI/PFO) and LOWLINE output, which triggers ~2% above the reset threshold for early warning.
It integrates a 40-kΩ oscillator-based watchdog with 0.48–1.12 s timeout, manual switchover via MSWITCH input, and a 1-Ω (max) PMOS switch from VDD to VOUT plus a 8–15-Ω switch from VBAT to VOUT. Battery-freshness seal disables VBAT connection until first power-up, limiting initial leakage to ≤100 nA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.65 V to 5.5 V - supports 5-V nominal systems while tolerating brownout down to 1.65 V before reset release |
| Reset Threshold (VIT) | 4.46–4.64 V - precise 5-V supply monitoring with ±2% tolerance over –40°C to 85°C |
| Watchdog Timeout | 0.48–1.12 s - configurable window for microcontroller firmware execution verification |
| Supply Current (IDD) | ≤40 µA - enables long-term battery-backed operation without significant drain on main supply |
| Battery Supply Current (IBAT) | ≤0.5 µA in backup mode - preserves lithium cell life during extended standby |
| VDD-to-VOUT rDS(on) | ≤1 Ω - low-loss power path ensures minimal voltage drop under 300-mA load |
| VBAT-to-VOUT rDS(on) | 8–15 Ω - optimized for low-current CMOS RAM backup, not high-power loads |
Pinout & Package
TPS3610T50PW is housed in a 14-pin TSSOP (PW) package, 5.10 mm × 6.60 mm, surface-mount, tape-and-reel only (R suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (Pin 2) | Main supply input | Monitored for reset generation; powers internal circuitry and drives VOUT when active |
| VBAT (Pin 14) | Backup battery input | Supplies VOUT during VDD failure; freshness seal isolates until first power-up |
| RESET (Pin 13) | Active-low reset output | Asserts low for ≥100 ms after VDD rises above VIT; holds low during brownout |
| CEIN (Pin 5) | Chip-enable input | Passes through to CEOUT when reset inactive; high-impedance during reset to prevent RAM corruption |
| CEOUT (Pin 10) | Chip-enable output | Gate signal for external memory enable; propagation delay ≤3 ns at 5 V |
| BATTOK (Pin 9) | Battery status indicator | Pulses low every 200 ms if VBAT < 2.33–2.47 V; confirms backup battery readiness |
| PFI (Pin 7) | Power-fail comparator input | Compares against 1.15-V internal reference; detects auxiliary rail collapse (e.g., 3.3-V or 12-V supplies) |
| MSWITCH (Pin 4) | Manual switchover control | Forces immediate battery mode when pulled high; must be grounded if unused |
Key Features
| Feature | Design Value |
|---|---|
| Battery-freshness seal | Disables VBAT path until first power-up, limiting initial leakage to ≤100 nA and preserving shelf life of lithium backup cells |
| Chip-enable gating | Series transmission gate blocks CEIN→CEOUT during reset, preventing erroneous writes to CMOS RAM even under undervoltage |
| Low-line warning (LOWLINE) | Asserts ~2% above VIT to provide nonmaskable interrupt for controlled shutdown before reset occurs |
| Power-fail comparator (PFI/PFO) | Dedicated 1.15-V reference allows monitoring of secondary rails (e.g., 3.3 V, 12 V) using external resistor dividers |
| Manual switchover (MSWITCH) | Enables deterministic battery activation for testing or forced low-power mode without waiting for VDD collapse |
Applications
| Portable Data Logging | Industrial HMI Terminals |
|---|---|
Use Scenario: Long-duration environmental sensor nodes powered by primary battery with lithium backup for RAM retention during seasonal maintenance outages. IC Role / Device Role / Timing Role: Supervises 5-V system rail, asserts RESET on brownout, switches VOUT to VBAT, and pulses BATTOK to verify backup health every 200 ms. Use Value: Ensures 10+ year data integrity in unattended deployments by eliminating write corruption and validating battery readiness without user intervention. |
Use Scenario: Touchscreen-based human-machine interface in factory automation, requiring fail-safe reboot and graceful shutdown on mains loss. IC Role / Device Role / Timing Role: Generates 100-ms RESET pulse, activates LOWLINE 2% above VIT to trigger NMI-driven shutdown routine, and gates CEOUT to freeze memory access during transition. Use Value: Prevents display corruption and firmware lockup by synchronizing hardware reset, software shutdown, and memory isolation within defined timing windows. |
| Point-of-Sale (POS) Systems | Set-Top Box Firmware Recovery |
Use Scenario: Credit card terminal with volatile SRAM storing transaction buffers and encryption keys, backed by coin-cell battery. IC Role / Device Role / Timing Role: Monitors 5-V DC input; asserts RESET if VDD drops below 4.46 V; enables BATTON to drive external PMOS for clean VOUT switchover. Use Value: Guarantees atomic transaction commit and secure key retention during unexpected AC dropout, meeting PCI PTS power-fail certification requirements. |
Use Scenario: Consumer set-top box performing firmware update over-the-air, where power interruption must not brick the device. IC Role / Device Role / Timing Role: Uses watchdog timer to detect hung bootloader; forces manual switchover (MSWITCH) to initiate recovery partition boot; monitors PFI for 3.3-V AVDD rail stability. Use Value: Enables robust dual-boot fallback by combining supervised reset, battery-backed RAM persistence, and auxiliary rail monitoring in single-package solution. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supervisory and battery-switchover applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3607-50PW | Single-supply-only (no VBAT switchover); no BATTOK or BATTON outputs; lacks manual switchover and freshness seal | Only suitable for basic 5-V reset supervision - cannot support battery-backed RAM retention or low-line warning | Select only if system requires only power-on reset and brownout detection without backup functionality. |
| MAX6361CSA+ | Higher VDD threshold (4.63 V min); includes temperature sensor; no VBAT switchover or CE gating; different pinout (8-pin SO) | Supports thermal monitoring but omits critical battery-handling features; incompatible pin mapping prevents drop-in replacement | Choose when ambient temperature awareness is prioritized over battery management and memory protection. |
Compared with TPS3610T50PW, TPS3607-50PW sacrifices battery backup and intelligent memory gating for lower cost and smaller footprint, while MAX6361CSA+ adds thermal sensing but removes switchover capability - making neither a functional substitute for full-featured RAM retention in 5-V systems.
Availability
TPS3610T50PW is available at Aetrix Electronics and suitable for portable battery-powered equipment, industrial HMI terminals, and point-of-sale systems requiring stable component supply across extended production lifecycles.
Supply support for TPS3610T50PW 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
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and power management technologies, with decades of experience in high-reliability supervisory circuits.
The TPS3610 family was designed specifically for systems requiring guaranteed data retention in CMOS RAM during power failure - integrating reset, watchdog, battery switchover, and chip-enable protection in one 14-pin TSSOP device.
FAQ
What is the exact reset threshold voltage range for TPS3610T50PW?
The TPS3610T50PW has a guaranteed reset threshold (VIT) of 4.46 V (min) to 4.64 V (max) over –40°C to 85°C, centered at 4.55 V typical. This 5-V-specific threshold ensures accurate brownout detection without false triggering during normal 5-V rail ripple or transient dips, and is distinct from the 1.71-V threshold used in the TPS3610U18 variant.
Does TPS3610T50PW support automatic switchover to backup battery when VDD fails?
Yes, TPS3610T50PW automatically switches VOUT from VDD to VBAT when VDD falls below the 4.46–4.64 V threshold and VBAT exceeds VDD. The internal 8–15-Ω switch connects VBAT to VOUT, and the battery-freshness seal ensures zero standby drain until first power application - a core function confirmed in the SLVS327B datasheet Section 9.
How does the watchdog timer in TPS3610T50PW operate, and what is its timeout window?
The TPS3610T50PW watchdog timer has a nominal timeout of 800 ms, with a specified range of 0.48 s (min) to 1.12 s (max) over temperature. It resets on any WDI edge (low-to-high or high-to-low), and if left floating, it self-triggers internally - ensuring continuous supervision even if the host processor stalls or loses clock signal.
Can TPS3610T50PW monitor voltages other than VDD, such as a 3.3-V auxiliary rail?
Yes, TPS3610T50PW includes a dedicated power-fail comparator with PFI input referenced to an internal 1.15-V threshold. By connecting an external resistor divider from the 3.3-V rail to PFI, the device generates a PFO low pulse when that rail drops below the programmed threshold - enabling multi-rail supervision without additional ICs.
What is the purpose and behavior of the LOWLINE output on TPS3610T50PW?
LOWLINE on TPS3610T50PW is an early power-fail warning output that asserts when VDD falls to ~2% above the reset threshold (VIT), providing a nonmaskable interrupt to the processor. This gives the system time to execute a controlled shutdown before RESET activates - a critical feature for preserving file system integrity and avoiding flash corruption in embedded applications.
TPS3610T50PW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Battery Backup Circuit
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.4V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 60ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-TSSOP
TPS3610T50PW FAQ
1.How can I place an order for TPS3610T50PW through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS3610T50PW 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 TPS3610T50PW reliable?
The price and inventory of TPS3610T50PW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS3610T50PW is usually 5 days.
3.What payment methods are accepted for TPS3610T50PW?
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Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS3610T50PW?
TPS3610T50PW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS3610T50PW 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 TPS3610T50PW?
For technical support, including TPS3610T50PW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS3610T50PW requirements.
6.How does Aetrix verify that TPS3610T50PW is sourced from the original manufacturer or authorized distributors?
All TPS3610T50PW 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 TPS3610T50PW meets industry standards.
7.What is the process for return or replacement of TPS3610T50PW?
All TPS3610T50PW units undergo pre-shipment inspection (PSI). If there is an issue with TPS3610T50PW, 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 TPS3610T50PW part is unused and in its original packaging.
Return procedure for TPS3610T50PW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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