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Infineon Technologies TCA965B
- Part No.:
- TCA965B
- Manufacturer:
- Infineon Technologies
- Category:
- Comparators
- Package:
- 14-DIP (0.300", 7.62mm)
- Datasheet:
-
TCA965B.pdf
- Description:
- IC COMPARATOR 1 WINDW 14DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,103
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Product details
Overview
TCA965B from Infineon Technologies is a bipolar window discriminator IC used for voltage monitoring and control in analog feedback loops. It compares an input voltage against independently adjustable upper/lower threshold edges (or center + half-width), provides three open-collector logic outputs (A, B, C) and one AND/NAND output (D), with hysteresis up to ±800 mV and 50 mA sink capability per output. It is deployed in precision DC voltage selection circuits and dead-band tracking controllers.
For engineers reviewing the TCA965B datasheet, TCA965B pinout, TCA965B application, or TCA965B equivalent, key considerations include its dual window-setting modes (direct/indirect), programmable hysteresis, 50 kHz Schmitt-trigger switching capability, and compatibility with ±13 V differential input ranges on comparator inputs.
Technical Context
The TCA965B implements two independent comparators (K1, K2) with hysteresis, fed by configurable input routing: in direct mode, pins V6/V7 set upper/lower thresholds while V8 accepts the monitored signal; in indirect mode, V8 sets center voltage, V9 sets half-window width, and V6/V7 accept the input. Amplifier Amp1 scales reference voltage, and Amp2 enables symmetric subtraction/addition for indirect window generation.
All four digital outputs (pins 2, 3, 13, 14) are open-collector with 50 mA sink rating. Inhibit inputs (pins 4, 12) force outputs A or B high when grounded. Internal stabilized reference voltages - VREF = 3 V (pin 5) and VStab = 6 V (pin 10) - support self-contained threshold generation without external references.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 4.5 V to 30 V - supports wide industrial rail operation without external regulators |
| Input Voltage Range (pins 6,7,8) | ±13 V differential - enables direct monitoring of bipolar signals or offset-referenced DC rails |
| Hysteresis Range | 1 mV to 800 mV - adjustable via external resistor to suppress noise-induced chatter in noisy environments |
| Output Sink Current | 50 mA per pin - drives LEDs, relays, or TTL/CMOS logic directly without buffer stages |
| Switching Frequency | Up to 50 kHz - suitable for high-speed Schmitt-trigger applications such as pulse shaping or clock conditioning |
| Reference Voltages | VREF = 3 V (pin 5), VStab = 6 V (pin 10) - internal stable references eliminate need for external precision references |
| Ambient Temp Range | –25 °C to +85 °C - qualified for industrial temperature operation without derating |
Pinout & Package
Package: PG-DIP-14-1 (14-pin plastic dual in-line package, through-hole mount, RoHS-compliant lead plating).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for all internal circuitry and output sinks |
| 2 | Output A | Open-collector logic output; active-low, 50 mA sink; inhibited when pin 4 = GND |
| 3 | Output D | Open-collector AND of A and B; used for combined window-in-range detection |
| 4 | Inhibit A | Active-low enable for Output A; grounding forces Output A high-impedance/high |
| 5 | VREF | Internal 3 V reference output; supplies bias for external resistor networks |
| 6 | V6 | Upper edge voltage input (direct mode) or input voltage (indirect mode) |
| 7 | V7 | Lower edge voltage input (direct mode) or input voltage (indirect mode) |
| 8 | V8 | Input voltage (direct mode) or center voltage (indirect mode) |
| 9 | V9 | Input voltage (direct mode) or half-window width setting (indirect mode) |
| 10 | VStab | Internal 6 V stabilized supply; powers internal amplifiers and references |
| 11 | +VS | Main supply input (4.5–30 V); powers entire IC including output drivers |
| 12 | Inhibit B | Active-low enable for Output B; grounding forces Output B high-impedance/high |
| 13 | Output C | Open-collector NAND of A and B; complements Output D for window-out-of-range flag |
| 14 | Output B | Open-collector logic output; active-low, 50 mA sink; inhibited when pin 12 = GND |
Key Features
| Feature | Design Value |
|---|---|
| Dual window configuration modes | Direct (V6/V7 thresholds + V8 input) or indirect (V8 center + V9 half-width) - simplifies design for either fixed-edge or proportional-tolerance applications |
| Programmable hysteresis | Adjustable from 1 mV to 800 mV via external resistor - prevents oscillation near threshold crossings in noisy systems |
| Four open-collector outputs | Pins 2 (A), 3 (D), 13 (C), 14 (B) each sink 50 mA - eliminates need for external driver transistors in most interface scenarios |
| Integrated reference sources | VREF = 3 V (pin 5), VStab = 6 V (pin 10) - enables fully self-contained window generation without external voltage references |
| Inhibit-controlled outputs | Pins 4 and 12 disable Outputs A and B independently - supports dynamic window masking or system-level enable/disable sequencing |
Applications
| DC Voltage Selection System | Dead-Band Tracking Controller |
|---|---|
Use Scenario: Selecting one of multiple regulated DC supplies based on measured output voltage falling within ±1% tolerance of nominal value. IC Role / Device Role / Timing Role: Window discriminator generating "in-tolerance" flag (Output D) and "out-of-tolerance" flag (Output C) for power supervisor logic. Use Value: Eliminates need for microcontroller ADC polling; provides deterministic, zero-latency voltage pass/fail decision with hysteresis. | Use Scenario: Controlling actuator position in HVAC damper systems where movement must halt within a 50 mV dead band around setpoint to prevent hunting. IC Role / Device Role / Timing Role: Generating hysteresis-bounded enable/disable signals for motor driver H-bridge control logic. Use Value: Reduces mechanical wear and energy consumption by suppressing unnecessary actuation cycles inside the dead band. |
| Schmitt-Trigger Signal Conditioner | Multi-Threshold Power Monitor |
Use Scenario: Converting noisy analog sensor outputs (e.g., thermistor voltage) into clean digital pulses for microcontroller capture timers. IC Role / Device Role / Timing Role: High-frequency Schmitt trigger (50 kHz max) with user-adjustable thresholds and hysteresis. Use Value: Achieves reliable edge detection without software filtering or external RC networks, reducing BOM count and firmware overhead. | Use Scenario: Monitoring three independent 12 V rail voltages (CPU core, I/O, memory) for under/over-voltage faults in embedded computing platforms. IC Role / Device Role / Timing Role: Simultaneous window evaluation using shared VStab reference and independent V6/V7 pairs per rail. Use Value: Enables single-IC triple-rail supervision with coordinated fault reporting via Output C/D logic combinations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar window discriminator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM3914N-1 | 10-segment LED driver with built-in reference; no open-collector logic outputs or inhibit control | Designed for visual bar-graph display, not logic-level window flagging | Select only if analog display is primary requirement and logic interfacing is handled externally |
| LT6700IMS8-2 | Single micropower window comparator with 200 nA quiescent current; no internal reference or multi-output logic | Optimized for battery-powered sensing; lacks VStab/VREF outputs and AND/NAND logic functions | Prefer for ultra-low-power portable applications where logic integration is unnecessary |
Compared with LM3914N-1 and LT6700IMS8-2, the TCA965B uniquely integrates dual-mode window configuration, four logic outputs with 50 mA drive, and internal 3 V/6 V references - making it the only choice for self-contained, industrial-grade window flagging with programmable hysteresis and inhibit control.
Availability
TCA965B is available at Aetrix Electronics and suitable for DC voltage selection systems, dead-band tracking controllers, Schmitt-trigger signal conditioners, and multi-threshold power monitors requiring stable component supply and long-term industrial availability.
Supply support for TCA965B 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
Infineon Technologies is a German semiconductor manufacturer specializing in power management, automotive, and industrial control ICs, with leadership in high-reliability analog and mixed-signal solutions.
The TCA965B belongs to Infineon's legacy bipolar analog comparator family, designed specifically for precision voltage window detection in industrial automation, power supply supervision, and closed-loop control systems requiring deterministic hysteresis and robust output drive.
FAQ
What are the two window configuration methods supported by the TCA965B?
The TCA965B supports direct setting (V6 = upper edge, V7 = lower edge, V8 = input) and indirect setting (V8 = center voltage, V9 = half-window width, V6/V7 = input). Both modes use the same comparator core but route inputs differently via internal amplifier topology, enabling flexibility for fixed-threshold or proportional-tolerance designs without external op-amps.
Can the TCA965B operate from a 5 V supply?
Yes - the TCA965B operates over 4.5 V to 30 V, so 5 V is within specification. At 5 V, VStab remains stable at 6 V due to internal charge-pump regulation, and all outputs retain full 50 mA sink capability. Input common-mode range shrinks slightly, but pins V6/V7/V8/V9 still support ±10 V differential operation per datasheet limits at VS = 5 V.
How is hysteresis adjusted, and what is its practical range?
Hysteresis is adjusted externally via a single resistor between pins 1 and 5 (VREF), scaling internal feedback. The datasheet specifies 1 mV to 800 mV typical range. At minimum, it rejects sub-millivolt noise; at maximum, it creates a 1.6 V total window margin - sufficient to eliminate chatter in 120 Hz AC-coupled or motor-driven environments.
Do the open-collector outputs require pull-up resistors?
Yes - all outputs (pins 2, 3, 13, 14) are open-collector and require external pull-up resistors to the target logic rail (e.g., 3.3 V or 5 V). Values between 1 kΩ and 10 kΩ are typical; lower values improve rise time but increase power draw. No internal pull-ups exist, and connecting outputs directly to VCC without resistors will cause short-circuit damage.
TCA965B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 14-DIP (0.300", 7.62mm)
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Obsolete
- Type:
- Window
- Number of Elements:
- 1
- Output Type:
- Open-Collector
- Voltage - Supply, Single/Dual (±):
- 4.5V ~ 30V
- :
- -
- Voltage - Input Offset (Max):
- -
- Current - Input Bias (Max):
- -
- Current - Output (Typ):
- -
- Current - Quiescent (Max):
- -
- CMRR, PSRR (Typ):
- -
- Propagation Delay (Max):
- -
- Hysteresis:
- -40°C ~ 85°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Through Hole
- :
- PG-DIP-14-1
TCA965B FAQ
1.How can I place an order for TCA965B through Aetrix?
Please submit a Request for Quotation (RFQ) for TCA965B 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 TCA965B reliable?
The price and inventory of TCA965B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TCA965B is usually 5 days.
3.What payment methods are accepted for TCA965B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TCA965B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TCA965B?
TCA965B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TCA965B 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 TCA965B?
For technical support, including TCA965B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TCA965B requirements.
6.How does Aetrix verify that TCA965B is sourced from the original manufacturer or authorized distributors?
All TCA965B 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 TCA965B meets industry standards.
7.What is the process for return or replacement of TCA965B?
All TCA965B units undergo pre-shipment inspection (PSI). If there is an issue with TCA965B, 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 TCA965B part is unused and in its original packaging.
Return procedure for TCA965B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TCA965B Tags
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