My Inquiry
My Account
Texas Instruments LM311PWRG4
- Part No.:
- LM311PWRG4
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LM311PWRG4.pdf
- Description:
- IC COMPARATOR 1 GEN PUR 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,370
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM311PWRG4 from Texas Instruments is a single high-speed voltage comparator with open-collector output, designed for precision level detection and signal conditioning in industrial and embedded systems. It delivers 165 ns response time, supports ±15 V or single 5-V supply operation, and drives loads up to 40 V at 50 mA - enabling direct interface with TTL, MOS, relays, and lamps.
For engineers reviewing the LM311PWRG4 datasheet, LM311PWRG4 pinout, LM311PWRG4 application, or LM311PWRG4 equivalent, this page provides verified electrical parameters, strobe and balance functionality details, thermal metrics for TSSOP-8, real-world use cases in zero-crossing detection and peak sensing, and validated alternative comparators with documented differences.
Technical Context
The LM311PWRG4 uses a PNP input stage enabling common-mode operation down to VCC− − 0.7 V, and features dual output terminals (COL OUT and EMIT OUT) for flexible load referencing - ground, VCC+, or VCC−. Its strobe input (BAL/STRB) enables current-driven blanking (–3 mA to –5 mA), while BALANCE allows external offset trimming via resistor network.
It operates across 0°C to +70°C, supports absolute maximum supply differential of 30 V, and exhibits 300 nA max input bias current and 70 nA max input offset current. The open-collector output stage isolates emitter from VCC−, permitting precise control of low-level output voltage (VOL = 0.23 V @ 8 mA, VCC+ = 4.5 V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Response Time | 165 ns high-to-low (±15 V, 100-mV step, 5-mV overdrive); enables fast edge detection in timing-critical circuits. |
| Input Bias Current | Max 300 nA at 25°C; ensures minimal loading on high-impedance sources like sensors or RC networks. |
| Input Offset Voltage | Max 7.5 mV at 25°C; defines minimum detectable voltage difference before compensation. |
| Supply Range | 3.5 V to 30 V total differential (e.g., ±15 V or +5 V / GND); supports mixed-signal level shifting without external regulators. |
| Output Drive | 40 V collector-to-emitter max, 50 mA sink capability; directly switches solenoids, optocouplers, or logic inputs. |
| Strobe Input | Current-driven (–3 mA to –5 mA); disables output regardless of input state - critical for synchronized sampling. |
| Common-Mode Range | –14.7 V to +13.8 V (±15 V supplies); accommodates signals near rail without phase reversal. |
Pinout & Package
TSSOP-8 package (3.00 mm × 4.40 mm), moisture sensitivity level 1, rated for surface-mount reflow. Pin 1 = EMIT OUT, Pin 2 = IN+, Pin 3 = IN−, Pin 4 = VCC−, Pin 5 = BALANCE, Pin 6 = BAL/STRB, Pin 7 = COL OUT, Pin 8 = VCC+.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EMIT OUT (Pin 1) | Emitter output terminal | Provides low-side switching reference; connects to load return path for ground-referenced outputs. |
| IN+ (Pin 2) | Noninverting input | Accepts reference or signal input; common-mode range extends to VCC− − 0.7 V. |
| IN− (Pin 3) | Inverting input | Accepts threshold or feedback signal; differential comparison determines output state. |
| VCC− (Pin 4) | Negative supply rail | Reference for internal circuitry and emitter output; supports dual-supply or single-supply (GND) operation. |
| BALANCE (Pin 5) | Offset null adjustment | Connects to potentiometer wiper for manual input offset cancellation (e.g., 10-kΩ trimmer between VCC+ and VCC−). |
| BAL/STRB (Pin 6) | Strobe enable/disable | Current-sink input: pulling –3 mA forces high-impedance output, independent of IN+/IN−. |
| COL OUT (Pin 7) | Collector output terminal | Open-collector NPN drain; requires external pullup to define logic-high level and drive capability. |
| VCC+ (Pin 8) | Positive supply rail | Power source for internal stages and pullup network; sets upper limit for output voltage swing. |
Key Features
| Feature | Design Value |
|---|---|
| Strobe-controlled blanking | Enables synchronous sampling in data acquisition by disabling output during conversion windows. |
| Dual-output topology (COL OUT + EMIT OUT) | Allows load connection to ground, VCC+, or VCC− - eliminating need for level-shifting buffers in isolated systems. |
| Wide supply compatibility | Operates from 3.5 V to 30 V differential, including single 5-V logic rails and ±15-V op-amp supplies. |
| High-voltage open-collector output | Supports 40 V collector-to-emitter swing, enabling direct drive of 24-V industrial I/O or relay coils. |
| Low input bias current | 300 nA max ensures stable operation with megohm-range sensor interfaces and RC timing networks. |
Applications
| Zero-Crossing Detection | Oscillator Circuits |
|---|---|
Use Scenario: Detecting AC line voltage polarity transitions in power supplies and motor controllers. IC Role / Device Role / Timing Role: Voltage comparator comparing sine wave against 0-V reference to generate clean digital edges. Use Value: 165 ns response ensures sub-microsecond timing accuracy; dual supply support handles ±12 V transformer outputs directly. |
Use Scenario: Building free-running multivibrators and crystal oscillators for clock generation. IC Role / Device Role / Timing Role: Core timing element in relaxation oscillator topologies using RC feedback and hysteresis. Use Value: Strobe input enables external frequency gating; open-collector output simplifies connection to CMOS/TTL clock trees. |
| Peak Detection | Relay & Solenoid Control |
Use Scenario: Capturing maximum amplitude of analog sensor signals in data loggers and instrumentation. IC Role / Device Role / Timing Role: Comparator driving diode-capacitor hold circuit with reset control via BAL/STRB. Use Value: Low input bias current prevents capacitor discharge drift; BALANCE pin enables offset correction for precision DC hold. |
Use Scenario: Direct switching of 12–24 V mechanical relays or solenoids in PLC I/O modules. IC Role / Device Role / Timing Role: High-current comparator output stage replacing discrete transistor drivers. Use Value: 50 mA sink capability eliminates external driver transistors; 40 V rating supports industrial 24 VDC systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM393DR | Push-pull output (no external pullup needed), lower supply current (0.4 mA), but slower response (1.3 µs) and no strobe or balance pins. | Suitable for low-power, cost-sensitive logic-level comparison; not usable in high-speed or strobed sampling systems. | Select LM393DR only when speed < 1 µs is acceptable and strobe/offset trimming is unnecessary. |
| TLV3201DBVR | CMOS input (0.5 pA bias), 40 ns response, rail-to-rail input, but limited to 5.5 V max supply and no strobe/BALANCE functionality. | Ideal for battery-powered precision sensing; incompatible with industrial 24 V or ±15 V supplies and relay drive. | Choose TLV3201DBVR for ultra-low-input-current, high-speed apps below 5.5 V - not for LM311PWRG4's voltage or feature scope. |
Compared with LM311PWRG4, LM393DR trades speed and flexibility for simplicity and power efficiency, while TLV3201DBVR offers nanosecond speed and femtoamp inputs but sacrifices voltage range and strobe capability - making LM311PWRG4 uniquely suited for rugged, high-voltage, strobed comparator roles.
Availability
LM311PWRG4 is available at Aetrix Electronics and suitable for industrial automation, power supply monitoring, and test equipment requiring stable component supply across extended temperature and voltage ranges.
Supply support for LM311PWRG4 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 connectivity technologies, with decades of expertise in precision analog ICs.
The LM311PWRG4 belongs to TI's legacy high-speed comparator family, engineered for robust performance in industrial control, power conversion, and signal conditioning where wide supply range, high-voltage output, and strobe control are essential.
FAQ
What is the operating temperature range for LM311PWRG4?
The LM311PWRG4 is specified for operation from 0°C to +70°C ambient temperature. This commercial-grade range aligns with its intended use in non-automotive industrial and consumer electronics applications. Unlike the LM211Q (–40°C to +125°C) or LM111 (–55°C to +125°C), the LM311PWRG4 does not support extended temperature operation. Always verify thermal derating per RθJA = 162°C/W in TSSOP-8 when designing for high-power dissipation scenarios.
Can LM311PWRG4 operate from a single 5-V supply?
Yes, LM311PWRG4 can operate from a single 5-V supply (VCC+ = 5 V, VCC− = GND). Its input common-mode range extends from VCC− + 0.5 V to VCC+ − 1.5 V, allowing valid operation with inputs between 0.5 V and 3.5 V. The open-collector output requires an external pullup to 5 V, and VOL remains ≤0.4 V at 8 mA sink - ensuring reliable TTL/CMOS logic-level compatibility. This configuration is widely used in microcontroller interface circuits.
How does the BAL/STRB pin function in LM311PWRG4?
The BAL/STRB pin on LM311PWRG4 serves dual functions: as a strobe input (when driven with –3 mA to –5 mA) it forces the output into high-impedance state regardless of input conditions; as a balance control (when left open or connected to a potentiometer), it adjusts input offset voltage. TI explicitly warns against shorting BAL/STRB to ground - it must be current-driven. This pin enables precise timing control in sampled-data systems and calibration in precision measurement front-ends.
What is the maximum output voltage swing supported by LM311PWRG4?
LM311PWRG4 supports a maximum collector-to-emitter voltage of 40 V under recommended operating conditions. This is lower than the LM111/LM211 (50 V), reflecting its commercial temperature grade. When used with VCC− = GND, the COL OUT can switch loads up to 40 V referenced to ground. For higher voltages, external clamp protection or series limiting resistors are required. The EMIT OUT terminal further enables floating-load configurations referenced to VCC+ or VCC−.
Is LM311PWRG4 pin-compatible with other LM311 variants?
Yes, LM311PWRG4 (TSSOP-8) shares identical pinout with LM311D (SOIC-8), LM311P (PDIP-8), and LM311PS (SO-8). All eight pins - EMIT OUT, IN+, IN−, VCC−, BALANCE, BAL/STRB, COL OUT, VCC+ - map identically across these packages. This allows direct PCB footprint substitution between variants, provided thermal and mechanical constraints (e.g., TSSOP reflow profile, PDIP socket clearance) are satisfied. No schematic or layout changes are needed for package migration.
LM311PWRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 8-TSSOP (0.173", 4.40mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- General Purpose
- Number of Elements:
- 1
- Output Type:
- DTL, MOS, Open-Collector, Open-Emitter, RTL, TTL
- Voltage - Supply, Single/Dual (±):
- 3.5V ~ 30V, ±1.75V ~ 15V
- :
- 7.5mV @ ±15V
- Voltage - Input Offset (Max):
- 0.25µA @ ±15V
- Current - Input Bias (Max):
- 50mA
- Current - Output (Typ):
- 7.5mA
- Current - Quiescent (Max):
- -
- CMRR, PSRR (Typ):
- -
- Propagation Delay (Max):
- -
- Hysteresis:
- 0°C ~ 70°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 8-TSSOP
LM311PWRG4 FAQ
1.How can I place an order for LM311PWRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM311PWRG4 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 LM311PWRG4 reliable?
The price and inventory of LM311PWRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM311PWRG4 is usually 5 days.
3.What payment methods are accepted for LM311PWRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM311PWRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM311PWRG4?
LM311PWRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM311PWRG4 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 LM311PWRG4?
For technical support, including LM311PWRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM311PWRG4 requirements.
6.How does Aetrix verify that LM311PWRG4 is sourced from the original manufacturer or authorized distributors?
All LM311PWRG4 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 LM311PWRG4 meets industry standards.
7.What is the process for return or replacement of LM311PWRG4?
All LM311PWRG4 units undergo pre-shipment inspection (PSI). If there is an issue with LM311PWRG4, 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 LM311PWRG4 part is unused and in its original packaging.
Return procedure for LM311PWRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM311PWRG4 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…
