Silicon Labs TSM934ESE+

Overview

TSM934ESE+ from Silicon Labs is a quad micropower analog comparator with integrated 1.182V ±2% reference, ultra-low quiescent current (8.5μA max over -40°C to +85°C), push-pull TTL/CMOS-compatible outputs, and 12μs propagation delay at 10mV overdrive. It operates from single +2.5V to +11V or dual ±1.25V to ±5.5V supplies and supports battery-powered threshold detection and window comparator circuits.

For engineers reviewing the TSM934ESE+ datasheet, TSM934ESE+ pinout, TSM934ESE+ application, or TSM934ESE+ equivalent, key selection considerations include its quad-channel architecture, internal reference accuracy, GND-referenced output swing, and absence of HYST pin-requiring external hysteresis implementation for noise immunity in precision level-sensing designs.

Technical Context

The TSM934ESE+ integrates four independent comparators sharing a common internal 1.182V reference referenced to V−, with each output stage capable of sourcing/sinking ≥40mA continuously while maintaining sub-10μA total supply current. Its input common-mode range extends from V− to V+ − 1.3V, enabling rail-to-rail sensing in low-voltage systems down to 1.5V (TSM934 only).

Unlike TSM931–TSM933, the TSM934ESE+ lacks a dedicated HYST pin; hysteresis must be implemented externally via positive feedback resistors on each comparator's inputs. Output logic levels are TTL/CMOS-compatible with VOH ≥ V+ − 0.4V and VOL ≤ GND + 0.4V under specified load conditions.

Key Specifications

Pinout & Package

16-pin SOIC package (JEDEC MS-012 compliant), 10.3mm × 7.5mm footprint, 1.27mm pitch, with exposed pad not present. Pin 14 is GND; pins 1–2, 15–16 are comparator outputs; pins 4–5, 6–7, 10–11, 12–13 are input pairs; pin 8 is REF; pins 3 and 9 are V+ and V− respectively.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad comparator with reference applications.

Compared with MAX934ESE+, TSM934ESE+ offers identical functionality as an alternate source with guaranteed form-fit-function compliance; versus TLV3704IPW, it trades higher I_Q for integrated reference and faster response-reducing design complexity in cost- and space-constrained threshold detection systems.

Availability

TSM934ESE+ is available at Aetrix Electronics and suitable for battery-powered systems, power-supply supervision, analog signal conditioning, and portable instrumentation requiring stable component supply across extended temperature ranges.

Supply support for TSM934ESE+ 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

Silicon Labs is a fabless semiconductor company specializing in low-power mixed-signal ICs for timing, MCU, wireless, and sensor applications.

The TSM93x family was designed specifically for micropower analog comparison in space- and energy-constrained systems, emphasizing ultra-low I_Q, integrated reference, and robust output drive without external components.

FAQ

What is the maximum operating temperature range for the TSM934ESE+?

The TSM934ESE+ is rated for operation from −40°C to +85°C, as indicated by the "E" suffix in the part number. This extended temperature grade ensures reliable performance in industrial environments, automotive under-hood modules, and outdoor electronics where thermal stress exceeds commercial-grade limits. All electrical specifications-including 8.5μA max supply current and 1.182V ±2% reference accuracy-are guaranteed across this full range.

Does the TSM934ESE+ include an adjustable hysteresis pin like the TSM931–TSM933?

No, the TSM934ESE+ does not feature a dedicated HYST pin. Unlike TSM931–TSM933, hysteresis must be implemented externally using positive feedback resistors on each comparator's input pair. The TSM934ESE+ datasheet provides detailed design equations and example circuits (e.g., Figure 3) to calculate R1/R2 values for desired hysteresis bands, ensuring stable switching in noisy environments.

Can the TSM934ESE+ operate from a 1.8V single supply?

Yes-the TSM934ESE+ supports operation down to 1.5V single supply, as explicitly stated in the "Low-Voltage Operation: V+ = 1.5V (TSM934 Only)" section. At 1.8V, the comparators remain functional, though the internal 1.182V reference may exhibit reduced accuracy or dropout; full reference functionality is guaranteed only above 2.2V. Propagation delay increases and output drive decreases at sub-2.5V operation.

What is the output voltage swing specification for TSM934ESE+ when sourcing 10mA?

When sourcing 10mA, the TSM934ESE+ guarantees VOH ≥ V+ − 0.4V across −40°C to +85°C, per the Electrical Characteristics table on page 5. For example, with V+ = 3V, VOH ≥ 2.6V; with V+ = 5V, VOH ≥ 4.6V. This rail-swing capability ensures robust TTL/CMOS logic-level compatibility without pull-up resistors.

How is the reference voltage (REF) referenced in the TSM934ESE+?

The REF pin voltage is referenced to V−, not GND. When V− is tied to GND (single-supply mode), REF = 1.182V relative to GND. In dual-supply configurations (e.g., V+ = +5V, V− = −5V), REF = 1.182V above V−, i.e., −3.818V relative to GND. This V− referencing enables consistent trip-point scaling regardless of supply topology and must be accounted for in resistor-divider calculations.