LM319N 8mV 1uA Comparator IC PDIP-14
The LM319N is a dual high-speed voltage comparator housed in a 14-pin PDIP package, engineered for rapid threshold detection in mixed-signal systems. It accepts a wide range of supply arrangements from a single 5 V logic supply up to ±15 V power rails and is optimized to provide fast, deterministic switching behavior rather than high-precision amplification.
Each of the LM319N’s two independent channels compares differential inputs and drives an open-collector output transistor, allowing direct interfacing with TTL/CMOS logic, LEDs, or small relays when paired with an external pull-up. The device balances speed and robustness with moderate input bias currents and a common-mode input range suitable for many digital and analog detection tasks.
With typical response times around 80 ns (measured at ±15 V with a 100 mV step and small overdrive), reliable output saturation characteristics, and industry-standard PDIP packaging, the LM319N is a practical choice for level-shifting, window detectors, pulse discrimination, relay drivers, and other fast switching applications where predictable comparator action is required. Its straightforward interface and availability in PDIP form factor make it easy to prototype and replace in existing designs, and it supports moderate temperature environments up to +70°C.
Features:
- Two Independent Comparators on One Chip.
- Operates from a Single 5-V Supply.
- High-Speed Operation (80 ns Typical Response Time).
- Low Input Bias Current (1 µA Maximum).
- Inputs and Outputs can be Isolated from System Ground.
- High Common-Mode Slew Rate.
- Compatible with RTL, DTL, and TTL Logic.
- Output Can Drive Lamps and Relays (Up to 25 mA).
Specifications:
| Parameter | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Input Offset Voltage: | TA = 25°C | 8 | mV | ||
| Input Bias Current: | TA = 25°C | 1 | µA | ||
| Response Time: | VS = ±15 V, TA = 25°C | 80 | ns | ||
| Voltage Gain: | TA = 25°C | 8 | 40 | V/mV | |
| Supply Voltage Range: | Single Supply | 5 | 30 | V | |
| Dual Supply | ±2.5 | ±15 | V | ||
| Supply Current: | VS = ±15 V, TA = 25°C | 8 | 12.5 | mA | |
| Output Saturation Voltage: | IOUT = 25 mA | 0.75 | 1.5 | V | |
| Operating Temperature: | 0 | +70 | °C | ||
| Package: | PDIP | 14 |
Pinout Diagram:
Footprint:
Applications:
- Voltage Level Detection.
- Relay Drivers.
- Window Comparators / Window Detectors.
- Line Receivers.
- Zero-Crossing Detectors.
- Precision Schmitt Triggers.
- Analog-to-Digital Converters.
Package Contents:
- 1x LM319N 8mV 1uA Comparator IC PDIP-14
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