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Analog Devices Inc. LTC6993HDCB-4#TRMPBF
- Part No.:
- LTC6993HDCB-4#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Multivibrators
- Package:
- 6-WFDFN Exposed Pad
- Datasheet:
-
LTC6993HDCB-4#TRMPBF.pdf
- Description:
- IC MULTIVIBRATOR 11NS 6DFN
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
LTC6993HDCB-4#TRMPBF from Analog Devices is a falling-edge-triggered, retriggerable monostable multivibrator (one-shot) with programmable pulse width from 1µs to 33.6 seconds. It operates from 2.25V to 5.5V, consumes as low as 65µA at 2.25V/800kΩ, and delivers ±20mA CMOS output drive in a –40°C to 125°C industrial temperature range. It is used in missing-pulse detection and envelope detection circuits where precise, wide-range timing with dynamic retriggering is required.
For engineers reviewing the LTC6993HDCB-4#TRMPBF datasheet, LTC6993HDCB-4#TRMPBF pinout, LTC6993HDCB-4#TRMPBF application, or LTC6993HDCB-4#TRMPBF equivalent, key selection criteria include falling-edge trigger polarity, retrigger capability, 6-lead DFN package (2mm × 3mm), ±2.3% pulse width accuracy for widths >512µs, and AEC-Q100 qualification suitability for automotive-grade designs.
Technical Context
The LTC6993HDCB-4#TRMPBF implements a master oscillator with 1µs base period, programmable via ISET current sourced from the SET pin (1.25µA–20µA), and an internal 4-bit A/D converter on the DIV pin that selects both NDIV (1, 8, 64, ..., 2²¹) and output polarity (POL bit). Its digital filter and latch logic ensure clean edge detection and stable one-shot behavior.
Unlike fixed-timing ICs, it supports dynamic pulse width adjustment via control voltage on SET and real-time NDIV reconfiguration via DIV pin voltage changes post-startup. The falling-edge trigger (TRIG) and retriggerable operation allow indefinite pulse extension during active output, enabling robust response to burst-mode input signals in high-vibration environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Pulse Width Range | 1µs to 33.6 seconds - enables single-component replacement of RC timers, crystal oscillators, and microcontroller-based delays across ultra-short to multi-second intervals. |
| Trigger Polarity & Retrigger | Falling-edge sensitive and retriggerable - accepts consecutive falling edges during active output to extend pulse duration, critical for missing-pulse detection in noisy serial streams. |
| Pulse Width Accuracy | ±2.3% (for tOUT > 512µs) - ensures reliable timing margins in watchdog and safety-critical timeout functions without calibration. |
| Supply Voltage | 2.25V to 5.5V - supports direct interface with Li-ion battery systems (3.0–4.2V), 3.3V logic, and 5V legacy interfaces without level-shifting. |
| Output Drive | ±20mA CMOS - directly drives LEDs, small relays, or logic inputs without external buffers, reducing BOM count in portable equipment. |
| Operating Temperature | –40°C to 125°C - qualified for under-hood automotive, industrial motor controls, and aerospace power management where thermal stability is mandatory. |
| Package | 6-lead DFN (2mm × 3mm, 1mm height) - surface-mount footprint compatible with automated assembly and space-constrained PCB layouts. |
Pinout & Package
Package: 6-lead plastic DFN (2mm × 3mm, 1mm profile), exposed pad connected to GND. RoHS-compliant, lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TRIG (Pin 1) | Falling-edge trigger input | Initiates output pulse on falling transition; hysteresis ensures noise immunity on slow-rising signals (VIH ≈ 0.7·V+, VIL ≈ 0.3·V+). |
| GND (Pin 2) | Analog/digital ground reference | Low-inductance return path for SET, TRIG, and output currents; exposed pad must be soldered to PCB ground plane for thermal and EMI performance. |
| SET (Pin 3) | Pulse width programming node | Sources ISET (1.25–20µA); voltage regulated to 1.00V ±30mV; connects to precision RSET (50kΩ–800kΩ) for accurate tOUT = NDIV·RSET/50kΩ·1µs. |
| DIV (Pin 4) | Divider ratio & polarity control | Voltage-programmed 4-bit A/D input (VDIV/V+ = (DIVCODE + 0.5)/16 ±1.5%) sets NDIV and POL bit to select output polarity and pulse scaling factor. |
| V+ (Pin 5) | Power supply input | 2.25V–5.5V single supply; requires local 0.1µF ceramic bypass capacitor between V+ and GND to suppress switching noise. |
| OUT (Pin 6) | CMOS output driver | Full rail-to-rail swing (GND to V+); 30Ω typical output resistance; sources/sinks 20mA; rise/fall times <2.7ns at 2.25V with 5pF load. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable pulse width via resistor network | Single RSET (50kΩ–800kΩ) and resistor divider on DIV pin enable precise, drift-compensated timing without microcontroller intervention. |
| Falling-edge retriggerable operation | Enables continuous pulse extension during active output-ideal for detecting intermittent faults in serial data or sensor streams. |
| Wide supply range and ultra-low quiescent current | 65µA supply current at 2.25V/800kΩ allows battery-powered operation for years in envelope detector or watchdog applications. |
| Output polarity selection | POL bit (via DIVCODE) configures positive or negative output pulses-eliminates need for external inverters in mixed-signal timing chains. |
| AEC-Q100 qualified variant available | LTC6993HS6-4#WTRMPBF and LTC6993HDCB-4#WTRMPBF meet automotive reliability standards for use in engine control and ADAS subsystems. |
Applications
| Missing Pulse Detection | Envelope Detection |
|---|---|
Use Scenario: Monitoring periodic CAN or UART frames where loss of expected transmission indicates bus failure or node disconnection. IC Role / Device Role / Timing Role: Falling-edge triggered one-shot configured with ~10ms pulse width; TRIG tied to frame sync signal; missing edge causes output to fall, triggering fault interrupt. Use Value: Eliminates software polling overhead and provides deterministic hardware-level fault response within nanoseconds of pulse loss. | Use Scenario: Extracting amplitude envelope from RF-modulated carrier signals in wireless sensor receivers or medical telemetry. IC Role / Device Role / Timing Role: Configured as gated integrator: TRIG driven by carrier zero-crossings; SET and DIV set for µs-scale pulse width matching modulation bandwidth. Use Value: Delivers jitter-free, temperature-stable envelope timing without analog op-amp drift or ADC sampling latency. |
| Watchdog Timer | High-Vibration Timing |
Use Scenario: Supervising microcontroller health in industrial PLCs where software hangs must reset system within 100ms. IC Role / Device Role / Timing Role: Retriggerable one-shot with 100ms tOUT; MCU toggles TRIG before timeout; failure to retrigger asserts reset via OUT. Use Value: Guarantees fail-safe reset independent of MCU clock integrity or firmware state-critical for SIL-2/IEC 61508 compliance. | Use Scenario: Timing control in engine management systems subject to shock (>50g) and thermal cycling (–40°C to 125°C). IC Role / Device Role / Timing Role: LTC6993HDCB-4#TRMPBF's DFN package and –40°C to 125°C rating provide mechanical and thermal stability where ceramic resonators or SOT-23 parts crack or drift. Use Value: Maintains ±2.3% pulse width accuracy across full temperature range-enabling reliable ignition timing or fuel injection sequencing without recalibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar monostable timing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC6993HDCB-2#TRMPBF | Rising-edge trigger, retriggerable; identical pulse width range, accuracy, and package. | Requires rising-edge input signal instead of falling-edge; unsuitable for inverted logic paths without external inverter. | Select when system TRIG signal is naturally rising (e.g., GPIO toggle, comparator output) and polarity inversion is undesirable. |
| LTC6993HDCB-4#WTRMPBF | Automotive-grade version with AEC-Q100 qualification, same electrical specs and pinout. | Required for production automotive ECUs; includes extended reliability testing, traceable lot documentation, and PPAP support. | Select for Tier-1 automotive programs where qualification evidence and supply chain traceability are mandatory. |
Compared with LTC6993HDCB-2#TRMPBF, the LTC6993HDCB-4#TRMPBF enables direct interface with falling-edge sources like differential receivers or inverted microcontroller outputs-reducing component count. Versus LTC6993HDCB-4#WTRMPBF, it offers identical timing performance but lacks automotive qualification documentation and controlled manufacturing flow.
Availability
LTC6993HDCB-4#TRMPBF is available at Aetrix Electronics and suitable for missing-pulse detection, envelope detection, and watchdog timer applications requiring stable component supply across industrial, automotive, and portable equipment designs.
Supply support for LTC6993HDCB-4#TRMPBF 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
Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, communications, automotive, and consumer markets since 1965.
The TimerBlox® family-including LTC6993HDCB-4#TRMPBF-is designed for precision, low-power, resistor-programmable timing in space- and power-constrained systems where microcontroller-based timing is impractical or unreliable.
FAQ
What is the trigger behavior of the LTC6993HDCB-4#TRMPBF?
The LTC6993HDCB-4#TRMPBF is a falling-edge-triggered, retriggerable monostable multivibrator. A falling transition on the TRIG pin initiates the output pulse, and subsequent falling edges occurring before the pulse completes will extend its duration. This behavior is confirmed in Table 2 and Figure 4 of the datasheet, distinguishing it from non-retriggerable or rising-edge variants like LTC6993-1 or LTC6993-2.
How do I set a 10ms output pulse width on the LTC6993HDCB-4#TRMPBF?
To achieve a 10ms pulse width on the LTC6993HDCB-4#TRMPBF, configure NDIV = 512 (DIVCODE = 3, VDIV/V+ ≈ 0.21875) and RSET = 100kΩ. This yields tOUT = 512 × 100kΩ / 50kΩ × 1µs = 10.24ms. Use 1% metal-film resistors for RSET and the DIV divider to maintain ±2.3% accuracy per the datasheet's specifications for NDIV ≥ 512.
Does the LTC6993HDCB-4#TRMPBF require external components to operate?
Yes-the LTC6993HDCB-4#TRMPBF requires three external components for basic operation: a 0.1µF ceramic capacitor between V+ and GND, a precision resistor (RSET) from SET to GND, and a resistor divider (R1/R2) on the DIV pin to set NDIV and polarity. No crystal, inductor, or additional ICs are needed, making it a self-contained timing solution.
What is the maximum output current capability of the LTC6993HDCB-4#TRMPBF?
The LTC6993HDCB-4#TRMPBF provides ±20mA CMOS output drive at V+ = 2.7V to 5.5V, as specified in the Electrical Characteristics table under IOUT(MAX). This allows direct driving of LEDs, small solenoids, or logic inputs without external buffers-verified across the full –40°C to 125°C operating range.
Is the LTC6993HDCB-4#TRMPBF suitable for automotive applications?
The LTC6993HDCB-4#TRMPBF is rated for –40°C to 125°C operation and shares the same silicon and design as AEC-Q100 qualified variants (e.g., LTC6993HDCB-4#WTRMPBF). While it is not itself AEC-Q100 certified, its temperature grade and reliability characteristics make it suitable for non-safety-critical automotive subsystems such as body electronics or infotainment-provided qualification is performed at the system level.
LTC6993HDCB-4#TRMPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- LTC®6993
- Package/Case:
- 6-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Logic Type:
- Monostable
- Independent Circuits:
- 1
- Schmitt Trigger Input:
- No
- Propagation Delay:
- 11 ns
- Current - Output High, Low:
- 16mA, 16mA
- Voltage - Supply:
- 2.25 V ~ 5.5 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-DFN (2x3)
LTC6993HDCB-4#TRMPBF FAQ
1.How can I place an order for LTC6993HDCB-4#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC6993HDCB-4#TRMPBF 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 LTC6993HDCB-4#TRMPBF reliable?
The price and inventory of LTC6993HDCB-4#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC6993HDCB-4#TRMPBF is usually 5 days.
3.What payment methods are accepted for LTC6993HDCB-4#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC6993HDCB-4#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC6993HDCB-4#TRMPBF?
LTC6993HDCB-4#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC6993HDCB-4#TRMPBF 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 LTC6993HDCB-4#TRMPBF?
For technical support, including LTC6993HDCB-4#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC6993HDCB-4#TRMPBF requirements.
6.How does Aetrix verify that LTC6993HDCB-4#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC6993HDCB-4#TRMPBF 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 LTC6993HDCB-4#TRMPBF meets industry standards.
7.What is the process for return or replacement of LTC6993HDCB-4#TRMPBF?
All LTC6993HDCB-4#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC6993HDCB-4#TRMPBF, 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 LTC6993HDCB-4#TRMPBF part is unused and in its original packaging.
Return procedure for LTC6993HDCB-4#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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