Texas Instruments LM393BIDSGR

Overview

LM393BIDSGR from Texas Instruments is a dual precision voltage comparator in an 8-pin WSON package with exposed thermal pad. It operates from 2V to 36V supply, delivers ±0.37mV typical input offset voltage, 1µs propagation delay, 200µA per comparator quiescent current, and supports rail-to-rail common-mode input down to ground - ideal for overvoltage detection in server PSUs.

For engineers reviewing the LM393BIDSGR datasheet, LM393BIDSGR pinout, LM393BIDSGR application, or LM393BIDSGR equivalent, key selection criteria include its 38V absolute max supply rating, 2kV HBM ESD robustness, low 3.5nA input bias current, compatibility with TTL/MOS/CMOS outputs, and drop-in replacement capability for legacy LM393/LM293 designs.

Technical Context

The LM393BIDSGR implements two independent open-collector comparators with dedicated ESD clamps enabling 2kV HBM protection. Its input stage supports common-mode voltages from –0.1V to (V_CC – 2V), and differential input range up to ±38V - allowing direct sensing of high-side signals without level-shifting.

Propagation delay is specified at 1µs under 5mV overdrive with 15pF load and 5.1kΩ pull-up; output sinking capability reaches 21mA at 5V supply while maintaining VOL ≤ 400mV at 4mA sink current - enabling direct interface with logic families and discrete power switches.

Key Specifications

Pinout & Package

LM393BIDSGR uses an 8-pin WSON (DSG) package measuring 2.00mm × 2.00mm with an exposed thermal pad on the underside, requiring direct connection to GND for optimal thermal performance and EMI suppression.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual comparator applications.

Compared with LM393DR and LM2903BQDRQ1, the LM393BIDSGR offers the lowest offset and fastest response in the smallest footprint, making it optimal for space-constrained industrial and telecom equipment where precision and speed outweigh automotive qualification needs.

Availability

LM393BIDSGR is available at Aetrix Electronics and suitable for server PSU monitoring, industrial motor drive protection, vacuum robot safety interlocks, and wireless infrastructure power sequencing requiring stable component supply and long-term production continuity.

Supply support for LM393BIDSGR 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 and embedded processing technologies, with decades of leadership in precision signal conditioning and power management ICs.

The LM393B series belongs to TI's industry-standard voltage comparator product line, designed specifically for high-reliability industrial, computing, and communications systems requiring robust performance across wide temperature and supply ranges.

FAQ

What is the maximum supply voltage rating for LM393BIDSGR?

The LM393BIDSGR has an absolute maximum supply voltage rating of 38V, exceeding legacy LM393 devices rated for 36V. This allows direct integration into higher-voltage industrial power rails without external regulators. The recommended operating range remains 2V to 36V per datasheet Section 5.2, and operation beyond 36V risks permanent damage despite the 38V absolute rating.

Does LM393BIDSGR support rail-to-rail input operation?

Yes, the LM393BIDSGR supports a common-mode input voltage range from –0.1V to (V_CC – 2V), which includes ground and extends near the positive rail. This eliminates the need for input biasing resistors in single-supply applications. However, inputs must not go below –0.3V to avoid incorrect output states or excessive input current, as specified in Section 5.5.

Can LM393BIDSGR replace LM393DR on an existing PCB?

No - LM393BIDSGR uses an 8-pin WSON (DSG) package with 0.5mm pitch and exposed thermal pad, while LM393DR uses SOIC-8 with 1.27mm pitch. They are not pin-compatible or footprint-compatible. A PCB redesign is required to migrate from SOIC to WSON. For drop-in replacement, consider LM393BDGKR (same DSG package) or LM393BDR (SOIC-8 variant).

What is the thermal pad connection requirement for LM393BIDSGR?

The exposed thermal pad on the underside of the LM393BIDSGR (DSG package) must be soldered directly to a GND plane using ≥4 thermal vias. Per Section 4.2 and Table 5.3, this reduces junction-to-board thermal resistance to 63.1°C/W - critical for maintaining safe junction temperature at 36V supply and full-load operation. Leaving the pad unconnected degrades thermal performance by >50%.

Is LM393BIDSGR suitable for automotive applications?

The LM393BIDSGR is not AEC-Q100 qualified and is rated for –40°C to +85°C operation, limiting its use in automotive under-hood environments. For automotive applications, TI recommends LM2903BQDRQ1 (AEC-Q100 Grade 1, –40°C to +125°C) or LM2903QPWRQ1 (Grade 0). LM393BIDSGR is intended for industrial, computing, and telecom systems meeting commercial/industrial reliability standards.