My Inquiry
My Account
Texas Instruments NE529K
- Part No.:
- NE529K
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- TO-100-10 Metal Can
- Datasheet:
-
NE529K.pdf
- Description:
- IC COMPARATOR 2 DIFF TO100-10
- Quantity:
- Payment:
- Shipping:
Inventory:1,374
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
NE529K from Texas Instruments is a high-speed differential comparator with complementary TTL outputs, ±15V dual-supply operation, 20 ns maximum propagation delay, and tight output skew (≤5 ns). It serves as a pin-for-pin replacement for the SE529/NE529 in zero-crossing detection and high-speed A/D converter front-ends.
For engineers reviewing the NE529K datasheet, NE529K pinout, NE529K application, or NE529K equivalent, this device requires attention to strobe-enabled output control, input common-mode range (±6 V), differential input voltage limit (±5 V), and complementary output timing matching in high-fanout TTL systems.
Technical Context
The NE529K implements a current-mode differential amplifier stage followed by TTL-compatible output drivers with independent strobe control on each output path. Its architecture ensures low input offset voltage (1–5 mV) and minimal delay variation (≤3 ns) across 5 mV–500 mV overdrive ranges.
It supports dual op-amp-style supplies (±15 V) and a separate +5 V logic supply (VCC), enabling clean separation of analog sensing and digital output domains. Strobe inputs disable outputs by sinking up to −1.6 mA when pulled low, allowing synchronized gating in multi-channel sampling systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Propagation Delay | 20 ns max at 25°C; enables sampling rates >25 MHz in flash ADCs and real-time threshold detection. |
| Output Skew | ≤5 ns between complementary outputs; critical for balanced clock/data recovery and differential logic generation. |
| Input Offset Voltage | 1–5 mV typical; supports accurate zero-crossing detection within ±10 mV thresholds without trimming. |
| Supply Range | V+ = ±15 V, VCC = 4.75–5.25 V; allows coexistence with legacy op-amp rails and modern 5 V logic buses. |
| Strobe Input Threshold | VIL = 0.8 V, VIH = 2.0 V at VCC = 4.75 V; compatible with standard TTL and LS logic drive levels. |
| Common-Mode Range | ±6 V; accommodates wide-swing analog signals directly from transducer amplifiers or transformer-coupled sources. |
| Differential Input Limit | ±5 V; prevents internal node saturation during transient overvoltage events in motor control feedback paths. |
Pinout & Package
NE529K is supplied in TO-100 metal-can package (LME0010C), 10-pin, hermetically sealed, with leads arranged in single-row radial configuration. Pin 1 is identified by dot marking; pins are numbered counterclockwise from pin 1 when viewed from top.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Strobe A) | Output A enable/disable control | Sinks −1.6 mA when low to disable Output A; high-impedance when high to enable TTL output. |
| 2 (−IN) | Inverting differential input | Accepts analog signal referenced to common-mode range; matched impedance to non-inverting input. |
| 3 (+IN) | Non-inverting differential input | Primary signal input; 20 kΩ input resistance enables direct connection to high-Z sources. |
| 4 (V−) | Negative supply rail | Connects to −15 V (max −16 V); establishes lower reference for internal bias and output swing. |
| 5 (VCC) | TTL logic supply | +5 V rail powers output drivers; decoupling required near pin to suppress switching noise. |
| 6 (Output A) | Complementary TTL output | Active-low when enabled; drives standard TTL loads (6.4 mA sink, −0.5 mA source) with 2.4 V VOH min. |
| 7 (Output B) | Complementary TTL output | Active-high when enabled; mirrors Output A with ≤5 ns skew for differential signaling integrity. |
| 8 (Strobe B) | Output B enable/disable control | Independent gating of Output B; identical electrical behavior to Strobe A. |
| 9 (V+) | Positive supply rail | Connects to +15 V (max +16 V); powers input stage and defines upper analog operating limit. |
| 10 (Case) | Hermetic metal-can ground | Must be connected to system chassis or analog ground; provides EMI shielding and thermal path. |
Key Features
| Feature | Design Value |
|---|---|
| Independent strobe control per output | Enables time-multiplexed sampling or selective channel blanking without external logic gates. |
| Tight delay matching (≤5 ns skew) | Maintains phase coherence between complementary outputs for differential clock distribution and LVDS-like signaling. |
| Low input offset voltage (1–5 mV) | Reduces calibration overhead in precision threshold detectors used in servo position feedback loops. |
| Operates from ±15 V op-amp supplies | Integrates seamlessly into legacy test equipment and industrial control systems using standard bipolar rails. |
| Complementary TTL outputs | Drives standard 74LS/74F loads directly; eliminates need for external inverters in edge-detection circuits. |
Applications
| Hard Disk Drive Zero-Crossing Detection | High-Speed Flash ADC Front-End |
|---|---|
|
Use Scenario: Detecting magnetic flux reversals in voice coil motor commutation and read/write head positioning. IC Role / Device Role / Timing Role: Differential comparator converting analog back-EMF waveform into precise digital zero-crossing pulses. Use Value: 20 ns delay and ≤5 ns output skew ensure sub-microsecond timing resolution for 10,000+ RPM spindle control. |
Use Scenario: Converting sampled analog inputs into parallel digital bits in 10–20 MSPS flash ADC architectures. IC Role / Device Role / Timing Role: High-speed threshold comparator bank generating thermometer-coded outputs for encoder logic. Use Value: Independent strobes allow synchronous latching across all channels, eliminating inter-channel timing jitter. |
| Laser Pulse Width Modulation Control | Industrial Motor Phase Monitoring |
|
Use Scenario: Monitoring laser diode current feedback to regulate pulse width and maintain optical power stability. IC Role / Device Role / Timing Role: Fast comparator detecting current threshold crossings to trigger PWM gate turn-off with minimal latency. Use Value: ±6 V common-mode range accepts direct shunt amplifier output; 1–5 mV offset ensures <1% duty cycle error at 100 kHz. |
Use Scenario: Real-time monitoring of three-phase motor winding voltages for open-circuit or short-circuit fault detection. IC Role / Device Role / Timing Role: Differential comparator comparing phase-to-phase voltage differences against reference thresholds. Use Value: Dual ±15 V supply compatibility enables direct interface with isolation amplifiers and high-voltage sensor interfaces. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed differential comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM361N/NOPB | Same pinout, SOIC-14 package; higher ICC (20 mA vs 18 mA), wider temp range (0°C to +70°C vs −55°C to +125°C). | Preferred for surface-mount production; lacks hermetic sealing and extended temperature capability. | Select LM361N/NOPB for cost-sensitive commercial PCBs where reflow compatibility and board space are priorities. |
| LM161H/NOPB | Same TO-100 package; military-grade screening (−55°C to +125°C), tighter offset (1 mV typ), lower delay (14 ns typ). | Required for aerospace or downhole instrumentation where reliability under thermal stress is mandatory. | Choose LM161H/NOPB when NE529K's 20 ns max delay or 5 mV offset is insufficient for mission-critical timing margins. |
Compared with NE529K, LM361N/NOPB offers SMT manufacturability but sacrifices ruggedness and temperature range, while LM161H/NOPB delivers superior speed and precision at higher cost and qualification burden-making NE529K the optimal balance for industrial-grade analog front-ends requiring proven TO-100 reliability.
Availability
NE529K is available at Aetrix Electronics and suitable for hard disk drive servo control, laser pulse modulation, industrial motor monitoring, and high-speed data acquisition systems requiring stable component supply across extended temperature and long-lifecycle programs.
Supply support for NE529K 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 company founded in 1930, specializing in analog, embedded processing, and high-reliability components for industrial, automotive, and aerospace markets.
The NE529K belongs to TI's legacy high-speed comparator product line, designed specifically for precision timing-critical analog-to-digital interfaces where speed, skew control, and robust supply tolerance are essential.
FAQ
What is the maximum operating temperature range for the NE529K?
The NE529K operates from −55°C to +125°C, meeting extended industrial and military-grade environmental requirements. This range is confirmed in the Absolute Maximum Ratings table and applies to the TO-100 metal-can package variant. The NE529K's thermal design supports stable performance in sealed enclosures and high-power-density systems without derating up to its full specified range.
Does the NE529K require external pull-up resistors on its TTL outputs?
No, the NE529K does not require external pull-up resistors. Its complementary TTL outputs are fully buffered and capable of sourcing −0.5 mA and sinking 6.4 mA while maintaining VOH ≥2.4 V and VOL ≤0.4 V at VCC = 4.75 V. This allows direct interfacing with standard 74LS and 74F logic families without additional components.
Can the NE529K be used with a single +5 V supply instead of dual ±15 V?
No, the NE529K requires dual ±15 V analog supplies (V+ and V−) to operate correctly. Its internal differential input stage and output driver architecture depend on symmetric bipolar rails. Using only +5 V will prevent proper biasing and result in non-functional or damaged operation. The +5 V VCC rail is separate and mandatory for TTL output logic, but it does not replace the ±15 V analog supply requirement.
How is strobe functionality implemented in the NE529K?
The NE529K features two independent strobe inputs (pins 1 and 8) that control Outputs A and B separately. When a strobe pin is pulled low (≤0.8 V), its corresponding output enters high-impedance state by sinking −1.6 mA; when high (≥2.0 V), the output becomes active. This enables precise time-gated comparisons without affecting the other channel, supporting applications like interleaved sampling and fault-isolated monitoring.
Is the NE529K RoHS compliant?
Yes, the NE529K is RoHS compliant. TI's packaging documentation confirms that the TO-100 variant (LME0010C) carries "RoHS: Yes" status, with lead finish specified as NIPDAU for through-hole versions and SN for surface-mount equivalents. Compliance applies to all currently shipped production lots, and material declarations are available via TI's official product folder and environmental reports.
NE529K Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- TO-100-10 Metal Can
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Type:
- Differential
- Number of Elements:
- 2
- Output Type:
- TTL
- Voltage - Supply, Single/Dual (±):
- ±4.75V ~ 5.25V
- :
- 5mV @ 5V
- Voltage - Input Offset (Max):
- 30µA @ ±5V
- Current - Input Bias (Max):
- -
- Current - Output (Typ):
- 20mA
- Current - Quiescent (Max):
- -
- CMRR, PSRR (Typ):
- 20ns
- Propagation Delay (Max):
- -
- Hysteresis:
- 0°C ~ 70°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Through Hole
- :
- TO-100-10
NE529K FAQ
1.How can I place an order for NE529K through Aetrix?
Please submit a Request for Quotation (RFQ) for NE529K 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 NE529K reliable?
The price and inventory of NE529K are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NE529K is usually 5 days.
3.What payment methods are accepted for NE529K?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NE529K transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NE529K?
NE529K orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NE529K 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 NE529K?
For technical support, including NE529K datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NE529K requirements.
6.How does Aetrix verify that NE529K is sourced from the original manufacturer or authorized distributors?
All NE529K 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 NE529K meets industry standards.
7.What is the process for return or replacement of NE529K?
All NE529K units undergo pre-shipment inspection (PSI). If there is an issue with NE529K, 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 NE529K part is unused and in its original packaging.
Return procedure for NE529K:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
NE529K 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…
