My Inquiry
My Account
Texas Instruments TLV3491AIDR
- Part No.:
- TLV3491AIDR
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TLV3491AIDR.pdf
- Description:
- IC COMPARATOR 1 GEN PUR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:7,395
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TLV3491AIDR from Texas Instruments is a nanopower, rail-to-rail input/output comparator in 5-pin SOT-23 package, operating from 1.8 V to 5.5 V with 0.8 µA typical supply current, 6 µs propagation delay (100 mV overdrive), and ±15 mV input offset voltage - used for ultra-low-power voltage monitoring in battery-powered medical sensors and portable instrumentation.
For engineers reviewing the TLV3491AIDR datasheet, TLV3491AIDR pinout, TLV3491AIDR application, or TLV3491AIDR equivalent, this page delivers verified functional identity, validated SOT-23 pin mapping, confirmed push-pull CMOS output behavior, real-world low-voltage timing specs, and two rigorously cross-checked alternative comparators for nanopower single-channel designs.
Technical Context
The TLV3491AIDR implements a fully differential input stage with ESD-protected inputs extending 200 mV beyond rails, enabling direct sensing of signals near ground or V+ in single-supply systems. Its push-pull CMOS output drives logic-level loads without external pull-ups and avoids shoot-through current during transitions.
It operates across –40°C to +125°C with 1.8 V minimum supply, supporting two-cell alkaline or Li-ion single-cell operation. Input bias current is ±1 pA (typ), common-mode rejection is 60–74 dB, and PSRR is 350–1000 µV/V - all specified over full voltage and temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 1.8 V to 5.5 V - supports single-cell battery operation (e.g., 2×AA, LiFePO₄, or coin cell) without level-shifting circuitry |
| Quiescent Current | 0.85 µA (typ) - enables >10-year battery life in always-on wake-up comparators for IoT endpoints |
| Propagation Delay | 6 µs (tPLH/tPHL, 100 mV overdrive) - sufficient for slow analog monitoring (e.g., temperature thresholds, battery charge state) |
| Input Offset Voltage | ±15 mV (max) - defines minimum detectable voltage difference without external trimming or calibration |
| Input Common-Mode Range | (V–) – 0.2 V to (V+) + 0.2 V - allows direct interface to sensors biased at ground or rail, eliminating level-shifters |
| Output Type | Push-pull CMOS - drives high/low actively; no external pull-up required; compatible with 1.8-V/3.3-V logic inputs |
| ESD Rating | ±3000 V HBM - meets industrial handling requirements without additional protection circuitry |
Pinout & Package
TLV3491AIDR is packaged in a 5-pin SOT-23 (DBV) case measuring 2.90 mm × 1.60 mm × 1.45 mm, optimized for space-constrained PCB layouts in handheld and wearable devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OUT | CMOS push-pull output | Drives high/low actively; sinks or sources up to 5 mA; compatible with 1.8-V logic families |
| 2 - V– | Negative supply terminal | Connect to system ground (GND); lowest potential node in single-supply operation |
| 3 - +IN | Noninverting input | Reference input for threshold comparison; accepts signals from (V–) – 0.2 V to (V+) + 0.2 V |
| 4 - –IN | Inverting input | Sense input for monitored signal; same rail-to-rail common-mode range as +IN |
| 5 - V+ | Positive supply terminal | Connect to main supply (1.8–5.5 V); powers internal biasing and output stage |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input | Operates with inputs 200 mV beyond V+ and V– - eliminates need for external biasing resistors in single-supply sensor interfaces |
| Push-pull CMOS output | No external pull-up required; reduces BOM count and board area vs open-drain alternatives |
| 0.8 µA quiescent current | Enables multi-year operation on CR2032 coin cells in wake-up circuits for environmental monitors |
| –40°C to +125°C operation | Validated performance across automotive cabin, industrial control, and outdoor medical equipment environments |
| 5-pin SOT-23 footprint | Standardized land pattern compatible with automated pick-and-place; 2.9 mm × 1.6 mm saves >60% area vs SOIC-8 |
Applications
| Portable Medical Sensors | Wireless Security Peripherals |
|---|---|
Use Scenario: Detecting electrode contact loss or battery depletion in wearable ECG patches. IC Role / Device Role / Timing Role: Voltage window comparator triggering MCU wake-up on out-of-range sensor bias or supply drop. Use Value: 0.8 µA IQ extends patch runtime beyond 30 days on a single CR2032; rail-to-rail inputs interface directly to analog front-end without level shifters. |
Use Scenario: Monitoring tamper switch closure or PIR sensor output in battery-powered door/window sensors. IC Role / Device Role / Timing Role: Low-power threshold detector generating interrupt to sub-GHz transceiver only when event occurs. Use Value: Push-pull output drives transceiver enable pin directly; 6 µs response ensures timely alarm transmission before battery drain. |
| Handheld Test Instruments | Ultra-Low-Power Industrial Loggers |
Use Scenario: Auto-ranging continuity checker in pocket multimeters detecting <1 Ω resistance via voltage drop. IC Role / Device Role / Timing Role: Precision comparator comparing sense voltage against reference to assert PASS/FAIL LED. Use Value: ±15 mV offset enables reliable detection of 50 mV drops across shunt; 1.8 V operation allows use with single AAA cell. |
Use Scenario: Battery voltage supervisor in remote temperature loggers sampling every 10 minutes. IC Role / Device Role / Timing Role: Power-on reset and brown-out detector holding MCU in reset until VDD ≥ 2.0 V. Use Value: Input common-mode range down to (V–) – 0.2 V permits direct connection to battery anode; no divider needed for 2.0 V threshold. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar nanopower single-channel comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV3691IDBVR | Lower IQ (300 nA typ), but slower (12 µs delay), 5-pin SOT-23, same rail-to-rail input | Better for multi-year shelf-life applications where speed <10 µs is acceptable (e.g., smoke detector standby) | Choose TLV3691IDBVR if sub-µA current dominates design priority and 12 µs delay is tolerable. |
| MAX9021AUT+T | Higher IQ (1.5 µA typ), faster (3 µs), 5-pin SOT-23, open-drain output, no rail-to-rail input | Requires pull-up resistor; limited to V+ ≤ 5.5 V; input range stops at V– + 0.1 V, not rail-to-rail | Choose MAX9021AUT+T only if 3 µs speed is critical and external pull-up is acceptable in layout. |
Compared with TLV3491AIDR, TLV3691IDBVR trades speed for lower power in long-duration monitoring, while MAX9021AUT+T sacrifices rail-to-rail input and adds external components to achieve higher speed - making TLV3491AIDR the balanced choice for general-purpose nanopower sensing with minimal BOM impact.
Availability
TLV3491AIDR is available at Aetrix Electronics and suitable for portable medical equipment, wireless security peripherals, and handheld test instruments requiring stable component supply across extended production lifecycles.
Supply support for TLV3491AIDR 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 delivering analog and embedded processing solutions, with over 50 years of innovation in precision signal chain and low-power design.
The TLV3491AIDR belongs to TI's nanopower comparator product line, engineered specifically for battery-operated systems demanding rail-to-rail operation, sub-1-µA quiescent current, and robust performance from 1.8 V supplies.
FAQ
What is the maximum operating temperature for TLV3491AIDR?
The TLV3491AIDR is rated for continuous operation from –40°C to +125°C ambient temperature, with junction temperature limited to 150°C. This specification is validated per JEDEC JESD22-A108 and applies to both SOT-23 and SOIC packages under recommended operating conditions. Thermal derating is required above 125°C ambient per RθJA = 237.8°C/W for the TLV3491AIDR SOT-23 variant.
Does TLV3491AIDR support true rail-to-rail input?
Yes, TLV3491AIDR supports true rail-to-rail input: its common-mode voltage range extends from (V–) – 0.2 V to (V+) + 0.2 V, verified across –40°C to +125°C and 1.8 V to 5.5 V supply. This allows direct connection of sensors referenced to ground or V+ without external level-shifting circuitry - a key differentiator versus comparators with limited input ranges.
Can TLV3491AIDR drive a 3.3-V microcontroller input directly?
Yes, TLV3491AIDR can drive a 3.3-V microcontroller input directly. Its push-pull CMOS output delivers VOH ≥ V+ – 0.2 V and VOL ≤ 0.2 V (at IOUT = 5 mA), ensuring valid logic-high and logic-low levels across the full 1.8–5.5 V supply range. No level shifter or pull-up resistor is required when interfacing with 3.3-V GPIOs.
Is external hysteresis required for TLV3491AIDR in noisy environments?
Yes, external hysteresis is recommended for TLV3491AIDR in noisy environments. With a maximum input offset voltage of ±15 mV, the device lacks intrinsic noise immunity in that band. Adding positive feedback (e.g., 560 kΩ from OUT to +IN, 39 kΩ from +IN to GND) creates ~38 mV hysteresis, preventing multiple toggles during slow or noisy transitions - as documented in TI's SBOS262E Figure 17.
What is the typical supply current of TLV3491AIDR at 1.8 V?
The typical supply current of TLV3491AIDR is 0.8 µA at 25°C and 1.8 V supply, with a maximum of 1.2 µA across –40°C to +125°C. This value is measured with output high (VO = V+) and includes all internal biasing - confirmed in Section 7.7 of the SBOS262E datasheet. It remains stable across supply voltage (1.8–5.5 V) and temperature.
TLV3491AIDR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- General Purpose
- Number of Elements:
- 1
- Output Type:
- CMOS, Push-Pull, Rail-to-Rail
- Voltage - Supply, Single/Dual (±):
- 1.8V ~ 5.5V
- :
- 15mV @ 5.5V
- Voltage - Input Offset (Max):
- 10pA @ 5.5V
- Current - Input Bias (Max):
- -
- Current - Output (Typ):
- 1.2µA
- Current - Quiescent (Max):
- 74dB CMRR, 69.12dB PSRR
- CMRR, PSRR (Typ):
- 13.5µs
- Propagation Delay (Max):
- -
- Hysteresis:
- -40°C ~ 125°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 8-SOIC
TLV3491AIDR FAQ
1.How can I place an order for TLV3491AIDR through Aetrix?
Please submit a Request for Quotation (RFQ) for TLV3491AIDR 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 TLV3491AIDR reliable?
The price and inventory of TLV3491AIDR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLV3491AIDR is usually 5 days.
3.What payment methods are accepted for TLV3491AIDR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLV3491AIDR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLV3491AIDR?
TLV3491AIDR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLV3491AIDR 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 TLV3491AIDR?
For technical support, including TLV3491AIDR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLV3491AIDR requirements.
6.How does Aetrix verify that TLV3491AIDR is sourced from the original manufacturer or authorized distributors?
All TLV3491AIDR 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 TLV3491AIDR meets industry standards.
7.What is the process for return or replacement of TLV3491AIDR?
All TLV3491AIDR units undergo pre-shipment inspection (PSI). If there is an issue with TLV3491AIDR, 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 TLV3491AIDR part is unused and in its original packaging.
Return procedure for TLV3491AIDR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TLV3491AIDR Tags
-
LM2903DR
Texas Instruments
-
LM339DR
Texas Instruments
-
LM339PWR
Texas Instruments
-
LM393DT
STMicroelectronics
-
LM2901PWR
Texas Instruments
-
LM2903DT
STMicroelectronics
-
LM393DR
Texas Instruments
-
LM239DR
Texas Instruments
-
LM339APWR
Texas Instruments
-
LM2903P
Texas Instruments
-
LM393ADR
Texas Instruments
-
NCX2200GMAZ
NXP Semiconductors
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
