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Analog Devices Inc. LTC6994CDCB-1#TRPBF
- Part No.:
- LTC6994CDCB-1#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Delay Lines
- Package:
- 6-WFDFN Exposed Pad
- Datasheet:
-
LTC6994CDCB-1#TRPBF.pdf
- Description:
- IC DELAY BLOCK 8TAP PROG 6DFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,429
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Product details
Overview
LTC6994CDCB-1#TRPBF from Analog Devices is a TimerBlox® programmable delay block IC designed for edge-controlled timing in noise-prone environments. It delays either rising or falling input transitions (LTC6994-1 variant), supports 1µs–33.6s delay range via RSET resistor and DIV pin programming, operates from 2.25V to 5.5V, and delivers ±20mA CMOS output drive. It is used in switch debouncing, pulse qualification, and delay matching circuits.
For engineers reviewing the LTC6994CDCB-1#TRPBF datasheet, LTC6994CDCB-1#TRPBF pinout, LTC6994CDCB-1#TRPBF application, or LTC6994CDCB-1#TRPBF equivalent, this page provides verified delay accuracy specs, temperature-stable VSET regulation, DFN package layout guidance, and validated automotive-grade alternatives for high-reliability embedded timing design.
Technical Context
The LTC6994CDCB-1#TRPBF implements a master oscillator with 1µs/50kΩ scaling, whose frequency is set by ISET current sourced from the SET pin. Delay is computed as tDELAY = NDIV × RSET / 50kΩ × 1µs, where NDIV is selected from eight values (1, 8, 64, 512, 4096, 2¹⁵, 2¹⁸, 2²¹) via a 4-bit A/D converter on the DIV pin.
Its edge-selective behavior (rising OR falling only) is determined by the POL bit (MSB of DIVCODE); for LTC6994-1, POL = 0 enables rising-edge delay and POL = 1 enables falling-edge delay. The device features internal 1V VSET regulation, 70µA typical supply current at 10µs delay, and 500µs start-up time with power-on reset assertion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Delay Range | 1µs to 33.6 seconds - fully programmable via RSET (50kΩ–800kΩ) and DIVCODE-selectable NDIV. |
| Delay Accuracy | ±2.3% max for delays >512µs - ensures predictable timing in critical debounce and qualification functions. |
| Supply Voltage | 2.25V to 5.5V - compatible with modern low-voltage microcontrollers and battery-powered systems. |
| Output Drive | ±20mA CMOS - sufficient to directly drive logic inputs, LEDs (with series resistor), or small capacitive loads. |
| Operating Temp | 0°C to 70°C - commercial-grade specification confirmed for LTC6994CDCB-1 variants per ordering table. |
| Package | 6-lead (2mm × 3mm) DFN - low-profile, thermally enhanced surface-mount package with exposed pad tied to GND. |
| Start-Up Time | 500 × tMASTER (typical 500µs at RSET = 100kΩ) - deterministic initialization before first valid output transition. |
Pinout & Package
Package: 6-lead (2mm × 3mm) plastic DFN (DCB), 1mm profile, exposed thermal pad connected to GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (Pin 4) | Logic Input | Accepts 0V/V+ digital signal; hysteresis thresholds scale with V+ (≈0.55V+ + 185mV rising, ≈0.48V+ – 155mV falling). |
| GND (Pin 2) | Ground Reference | Low-inductance return path; exposed pad must be connected to PCB ground plane for thermal and noise performance. |
| SET (Pin 3) | Delay Programming | Sinks ISET current (1.25µA–20µA); voltage regulated to 1.00V ±30mV; requires ≤10pF capacitance for stability. |
| V+ (Pin 1) | Power Supply | 2.25V–5.5V input; must be bypassed with 0.1µF capacitor directly to GND pin to suppress switching noise. |
| DIV (Pin 5) | Divider & Polarity Control | 4-bit A/D input; voltage divider between V+ and GND sets NDIV and POL bit; ≤100pF capacitance required for fast settling. |
| OUT (Pin 6) | CMOS Output | Push-pull driver swinging rail-to-rail (GND to V+); 30Ω typical output resistance; sources/sinks up to ±20mA. |
Key Features
| Feature | Design Value |
|---|---|
| Rising- or falling-edge selective delay | LTC6994-1 functionality enables precise single-edge timing control without affecting opposite transitions. |
| Dynamic delay adjustment | DIV pin accepts analog voltage or DAC output to reconfigure NDIV and polarity during operation. |
| Noise-immune input thresholding | Hysteresis scales with supply voltage, rejecting sub-microsecond glitches common in mechanical switch bounce. |
| Ultra-low quiescent current | As low as 55µA at 2.25V/800kΩ idle condition - extends battery life in portable equipment. |
| Automotive-qualified option available | Same architecture offered in AEC-Q100 qualified versions (e.g., LTC6994HS6-1#WTRPBF) for under-hood applications. |
Applications
| Switch Debouncing | Noise Discriminator |
|---|---|
|
Use Scenario: Mechanical pushbutton or relay contact closure in industrial HMI or automotive control panels. IC Role / Device Role / Timing Role: LTC6994CDCB-1#TRPBF acts as a hardware-based pulse qualifier that ignores transients <1µs and outputs clean, delayed edges. Use Value: Eliminates need for firmware debouncing routines and reduces MCU interrupt load while ensuring deterministic response. |
Use Scenario: Filtering EMI-induced spikes on sensor lines or communication buses in high-vibration environments. IC Role / Device Role / Timing Role: LTC6994CDCB-1#TRPBF qualifies valid signal transitions by enforcing minimum pulse width and stable edge timing. Use Value: Prevents false triggering of downstream logic or ADC sampling due to electrical noise without adding software latency. |
| Delay Matching | Portable Equipment Timing |
|
Use Scenario: Synchronizing enable signals across multiple power rails or clock domains in FPGA or ASIC subsystems. IC Role / Device Role / Timing Role: LTC6994CDCB-1#TRPBF provides precise, resistor-programmed delay to align timing margins between parallel paths. Use Value: Achieves sub-microsecond skew control without requiring matched trace lengths or complex PLL-based solutions. |
Use Scenario: Power sequencing and wake-up timing in wearables, medical sensors, or IoT edge nodes. IC Role / Device Role / Timing Role: LTC6994CDCB-1#TRPBF generates low-power, supply-voltage-scalable delays to manage sleep/wake cycles and peripheral activation. Use Value: Enables ultra-low standby current (≤70µA) while maintaining accurate timing over 2.25V–5.5V battery discharge range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar programmable delay applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC6994IDCB-1#TRPBF | Same circuit architecture and pinout; rated for –40°C to 85°C operating range instead of 0°C to 70°C. | Required for extended-temperature industrial or outdoor deployments where ambient exceeds 70°C. | Select when wider temperature coverage is needed without changing board layout or firmware. |
| LTC6994HDCB-1#TRPBF | Identical functionality; specified for –40°C to 125°C operation and higher reliability screening. | Suitable for under-hood automotive or high-temperature industrial control applications. | Choose for AEC-Q100-aligned designs where long-term stability at elevated junction temperatures is critical. |
Compared with LTC6994CDCB-1#TRPBF, the LTC6994IDCB-1#TRPBF and LTC6994HDCB-1#TRPBF offer identical delay programming, pin compatibility, and DFN packaging but extend guaranteed operation to –40°C, enabling deployment in harsher thermal environments without redesign.
Availability
LTC6994CDCB-1#TRPBF is available at Aetrix Electronics and suitable for switch debouncing, noise discrimination, and delay matching applications requiring stable component supply across commercial temperature ranges.
Supply support for LTC6994CDCB-1#TRPBF 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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LTC6994CDCB-1#TRPBF belongs to the TimerBlox® family - a series of plug-and-play silicon timing devices engineered to replace discrete RC networks and microcontroller-based delays with deterministic, low-power, resistor-programmable solutions.
FAQ
What is the maximum delay achievable with the LTC6994CDCB-1#TRPBF?
The LTC6994CDCB-1#TRPBF supports a maximum delay of 33.6 seconds, achieved when NDIV = 2²¹ (2,097,152) and RSET = 800kΩ. This value is derived from the equation tDELAY = NDIV × RSET / 50kΩ × 1µs and is confirmed in the Electrical Characteristics table under tDELAY parameter (MAX = 33.55 sec). The device maintains ±5.1% accuracy even at the shortest 1µs delay setting.
How does the LTC6994CDCB-1#TRPBF differ from the LTC6994-2 variant?
The LTC6994CDCB-1#TRPBF implements the LTC6994-1 function: it delays either rising or falling edges-not both-based on the POL bit from the DIV pin. In contrast, LTC6994-2 variants delay both edges and add output inversion capability. This makes LTC6994CDCB-1#TRPBF ideal for asymmetric timing tasks like switch debouncing where only one edge requires qualification.
Can the LTC6994CDCB-1#TRPBF operate from a 2.5V supply?
Yes, the LTC6994CDCB-1#TRPBF is fully specified for operation from 2.25V to 5.5V. At 2.5V, it delivers 1.58V VOL (low-level output) at 8mA sink current and 2.17V VOH (high-level output) at 1mA source current, with propagation delay of 24ns. Supply current remains stable across this range, dropping to ~60µA in idle mode with RSET = 800kΩ.
What is the purpose of the exposed pad on the LTC6994CDCB-1#TRPBF DFN package?
The exposed pad (Pin 7) on the LTC6994CDCB-1#TRPBF DFN package is internally connected to GND and must be soldered to a PCB thermal pad tied to the system ground plane. This connection improves thermal dissipation (θJC = 10.6°C/W), reduces ground impedance, and minimizes noise coupling into sensitive analog nodes like the SET and DIV pins.
Is the LTC6994CDCB-1#TRPBF suitable for automotive applications?
The LTC6994CDCB-1#TRPBF itself is not AEC-Q100 qualified; however, Analog Devices offers functionally identical automotive-grade variants including LTC6994HS6-1#WTRPBF (SOT-23) and LTC6994HDCB-1#WTRPBF (DFN), both certified for –40°C to 125°C operation. For automotive use, those W-suffix parts must be selected instead of LTC6994CDCB-1#TRPBF.
LTC6994CDCB-1#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- TimerBlox®
- Package/Case:
- 6-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Taps/Steps:
- 8
- Function:
- Programmable
- Delay to 1st Tap:
- -
- Tap Increment:
- -
- Available Total Delays:
- 1µs ~ 33.6s
- Number of Independent Delays:
- 1
- Voltage - Supply:
- 2.25V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-DFN (2x3)
LTC6994CDCB-1#TRPBF FAQ
1.How can I place an order for LTC6994CDCB-1#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC6994CDCB-1#TRPBF 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 LTC6994CDCB-1#TRPBF reliable?
The price and inventory of LTC6994CDCB-1#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC6994CDCB-1#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC6994CDCB-1#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC6994CDCB-1#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC6994CDCB-1#TRPBF?
LTC6994CDCB-1#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC6994CDCB-1#TRPBF 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 LTC6994CDCB-1#TRPBF?
For technical support, including LTC6994CDCB-1#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC6994CDCB-1#TRPBF requirements.
6.How does Aetrix verify that LTC6994CDCB-1#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC6994CDCB-1#TRPBF 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 LTC6994CDCB-1#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC6994CDCB-1#TRPBF?
All LTC6994CDCB-1#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC6994CDCB-1#TRPBF, 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 LTC6994CDCB-1#TRPBF part is unused and in its original packaging.
Return procedure for LTC6994CDCB-1#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC6994CDCB-1#TRPBF Tags
-
LTC6994CS6-1#TRMPBF
Analog Devices Inc.
-
LTC6994CDCB-1#TRMPBF
Analog Devices Inc.
-
LTC6994IS6-1#TRMPBF
Analog Devices Inc.
-
LTC6994IS6-1#TRPBF
Analog Devices Inc.
-
LTC6994IDCB-1#TRMPBF
Analog Devices Inc.
-
LTC6994IS6-2#TRMPBF
Analog Devices Inc.
-
LTC6994HS6-1#TRPBF
Analog Devices Inc.
-
LTC6994HS6-1#TRMPBF
Analog Devices Inc.
-
LTC6994HS6-2#TRMPBF
Analog Devices Inc.
-
LTC6994HDCB-2#TRMPBF
Analog Devices Inc.
-
LTC6994HDCB-1#TRMPBF
Analog Devices Inc.
-
DS1124U-25+T
Analog Devices Inc./Maxim Integrated
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