TS339CN - 16V Micropower Quad CMOS Comparator | STMicroelectronics
MPN: TS339CN ✓ ActiveTS339CN Overview
A voltage comparator is an integrated circuit that compares two input voltages and changes its output state according to their relative polarity. The TS339 belongs to the comparator hierarchy, where a comparator is a type of analog integrated circuit and signal-conditioning semiconductor. Its four channels provide flexible logic-level sensing, while the open-drain outputs allow wired connections or external pull-up networks when a push-pull output is not required.
The principal benefits of the TS339CN are its low 9 uA typical supply current per comparator, extremely low 1 pA typical input offset current, and high 10^12 ohm typical input impedance. These characteristics reduce loading on high-impedance sensors and support battery-operated or low-leakage measurement systems. The open-drain architecture also supports wired-AND behavior, provided suitable pull-up resistors and an appropriate supply voltage are used.
The TS339CN is designed around a CMOS input stage and four independent comparator channels. Its response time is 1.5 us typical for a 5 mV overdrive condition, making it suitable for many threshold and control functions where microsecond-scale decisions are sufficient. The manufacturer also identifies the device as pin-to-pin and functionally compatible with the bipolar LM339, which can simplify qualification of an existing comparator-based design.
Typical uses include battery-powered sensor interfaces, low-voltage monitoring circuits, threshold detection, window comparators formed from pairs of channels, and general control logic. Because the outputs are open-drain, an application must include pull-up resistors whenever a valid high output level is required. The four-channel architecture also allows multiple independent measurements from a single IC.
For a new through-hole design, allow adequate clearance around the 14-pin DIP footprint and route sensitive input traces away from switching nodes and output pull-up networks. Input common-mode range, output saturation levels, supply current, and output timing should be checked against the manufacturer datasheet for the intended supply voltage and temperature conditions.
This page organizes the key TS339CN specifications, comparison information, practical design notes, and verified sourcing references. It also highlights the device's open-drain output architecture, low-power operation, and LM339 compatibility considerations for engineers evaluating PCB and firmware changes.
Drop-in alternatives for TS339CN — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with TS339CN (same form factor and footprint) — differing in Comparator Type, Mounting Type, Number of Comparators, Output Type, Package.
LM339DR
✅ Drop-InContact for price
View Datasheet →TS339CN Maximum Ratings & Electrical Characteristics
| Comparator Type | General-purpose CMOS voltage comparator |
| Number of Comparators | 4 |
| Output Type | Open drain |
| Supply Voltage | 2.7 V to 16 V |
| Maximum Supply Voltage | 16 V |
| Supply Current | 9 uA typical per comparator |
| Input Offset Current | 1 pA typical |
| Input Bias Current | 600 pA |
| Input Impedance | 10^12 ohms typical |
| Response Time | 1.5 us typical for 5 mV overdrive |
| Compatibility | Pin-to-pin and functionally compatible with bipolar LM339 |
| Package | 14-pin DIP, 7.62 mm row spacing |
| Mounting Type | Through hole |
TS339CN Pin Configuration
| Pin 1 | OUT 1 — Open-drain output for comparator channel 1 |
| Pin 2 | IN 1- — Inverting input for comparator channel 1 |
| Pin 3 | IN 1+ — Non-inverting input for comparator channel 1 |
| Pin 4 | GND — Ground connection |
| Pin 5 | IN 2+ — Non-inverting input for comparator channel 2 |
| Pin 6 | IN 2- — Inverting input for comparator channel 2 |
| Pin 7 | OUT 2 — Open-drain output for comparator channel 2 |
| Pin 8 | OUT 3 — Open-drain output for comparator channel 3 |
| Pin 9 | IN 3- — Inverting input for comparator channel 3 |
| Pin 10 | IN 3+ — Non-inverting input for comparator channel 3 |
| Pin 11 | GND — Ground connection |
| Pin 12 | IN 4+ — Non-inverting input for comparator channel 4 |
| Pin 13 | IN 4- — Inverting input for comparator channel 4 |
| Pin 14 | OUT 4 — Open-drain output for comparator channel 4 |
Typical Applications
TS339CN is suitable for 6 applications: Battery-Powered Sensor Interfaces, Threshold Detection and Control, Window Monitoring, Precision Voltage Reference Comparison, Industrial Level Sensing, Open-Drain Wired-Logic Interfacing.
Battery-Powered Sensor Interfaces
The TS339CN is appropriate for battery-powered sensing because each comparator consumes 9 uA typical, helping limit standby demand in portable measurement systems. Its 10^12 ohm typical input impedance and 1 pA typical input offset current minimize loading on high-impedance sources such as electrochemical sensors. Each channel compares a sensor-derived voltage against a reference and produces an open-drain status output. Add pull-up resistors to establish a usable high level, and keep the sensor input and reference traces short to reduce leakage and interference. The 1.5 us typical response for 5 mV overdrive is adequate for many slow sensing thresholds but should be checked against the required system polling rate.
Recommended
Threshold Detection and Control
The TS339CN can implement threshold detection with four independent comparator channels, allowing one IC to monitor several analog conditions. A 2.7 V to 16 V supply range supports both low-voltage logic and industrial signal ranges, while the open-drain output can directly drive a pull-up or participate in a wired-AND arrangement. The 1 pA typical input offset current is useful when the compared voltage comes from a high-impedance divider. Design each channel with suitable input common-mode limits and an output pull-up for the intended logic voltage. Its 1.5 us typical response time at 5 mV overdrive suits control loops that do not require sub-microsecond decision speed.
Recommended
Window Monitoring
Pairs of TS339CN channels can form upper and lower thresholds for a window comparator, useful in battery, sensor, and industrial monitoring systems. The device's four-channel organization allows two windows to be implemented in one 14-pin DIP without duplicating package count. Its 1 pA typical input offset current reduces errors when the monitored voltage is generated by a high-impedance source, while 9 uA typical consumption per comparator supports low-power designs. Each open-drain output requires its own pull-up or a suitable shared pull-up arrangement. Verify common-mode range, output saturation, and pull-up voltage against the manufacturer datasheet for the selected supply and input conditions.
Recommended
Precision Voltage Reference Comparison
The TS339CN can compare a precision reference against a divided or sensed voltage for limit detection and system supervision. Its high 10^12 ohm typical input impedance limits loading of the reference source, and the 1 pA typical input offset current helps preserve small voltage margins. Four channels support multiple rails or reference points within one package. The open-drain output provides flexible coupling to a pull-up, alarm input, or relay-control stage, although external drive strength must be evaluated. A 1.5 us typical response for 5 mV overdrive is suitable for power-supply supervision and slow precision threshold functions. The circuit should include adequate bypassing and keep the reference path away from noisy switching nodes.
Recommended
Industrial Level Sensing
The TS339CN is useful for industrial level or condition sensing where a controller must interpret an analog signal as above or below a threshold. The 16 V maximum supply provides compatibility with higher-voltage sensing systems, while the CMOS input characteristics minimize loading of resistive dividers or high-impedance probes. Four channels can monitor multiple levels or provide redundant comparisons. Because the output is open drain, the designer must choose pull-up resistors for the required logic voltage and account for leakage current from the wiring and board surface at very high impedance. Place the device away from motors, relay contacts, and switching power stages, and use the manufacturer's common-mode and output limits to define the usable input range.
Recommended
Open-Drain Wired-Logic Interfacing
The four open-drain outputs of the TS339CN can participate in wired-AND alarm or fault-signal networks, reducing the number of digital output drivers required. Each output can pull a shared bus low, while a pull-up establishes the high state; users must calculate the maximum sink current and ensure that one channel's leakage does not disturb another. The 2.7 V to 16 V supply range enables different logic levels when the pull-up and device supply are selected appropriately. The 9 uA typical current per comparator is beneficial in continuously monitored equipment. Avoid using open-drain outputs as a direct replacement for a push-pull driver, and verify input and output ratings for every channel connected to the bus.
Recommended
Recommended Products Summary
Engineering reference data for TS339CN — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | LM339 |
|---|---|---|
| Manufacturer | STMicroelectronics | Texas Instruments |
| Package | 14-pin DIP | 14-pin DIP |
| Comparator Count | 4 | 4 |
| Output Type | Open drain | Open drain |
| Input Technology | CMOS | Bipolar |
Key Differentiators
- Lower input offset current (vs LM339)
- Micropower CMOS implementation (vs LM339)
- Four independent channels in one package (vs LM339)
Design Notes
Every open-drain output requires a pull-up resistor when a valid high output is required. Select the pull-up voltage to match the receiving logic and calculate its maximum sink current at the output's low-state limit. Do not use the output as a push-pull driver, and account for leakage from all devices connected to a shared bus.
Keep the two inputs of each comparator as short as practical and separate them from switching nodes, relay contacts, and high-current return paths. For high-impedance sensing, use a guarded input layout, clean board materials, and a grounded guard structure where appropriate. The 1 pA typical offset current is valuable, but leakage through contamination or humidity can still dominate a very high-impedance design.
Do not assume that the TS339CN can replace every LM339 circuit without reviewing the original part's input common-mode range, output saturation, supply current, and output timing. Also verify that the board uses the through-hole 14-pin DIP footprint rather than the 14-SOIC TS339CD or TS339CDT variants. Use the manufacturer datasheet for the final pin and electrical checks.
Place the supply bypass capacitor close to the device and return its ground connection directly to the circuit ground plane. Although the TS339CN is specified at 9 uA typical per comparator, switching loads and pull-up networks can dominate total system consumption. Size pull-ups for adequate logic rise time without unnecessarily increasing continuous current.
Compliance Information
No explicit RoHS, REACH, lead-free, halogen-free, or conflict-minerals statement was identified for TS339CN. AEC-Q100 is not applicable because this is a general-purpose comparator rather than an automotive-qualified device.
