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Analog Devices Inc. LTC6994HDCB-1#TRPBF
- Part No.:
- LTC6994HDCB-1#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Delay Lines
- Package:
- 6-WFDFN Exposed Pad
- Datasheet:
-
LTC6994HDCB-1#TRPBF.pdf
- Description:
- IC DELAY BLOCK 8TAP PROG 6DFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,002
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Product details
Overview
LTC6994HDCB-1#TRPBF from Analog Devices is a TimerBlox® programmable delay block (LTC6994-1 variant) in 6-lead DFN package, delivering 1µs–33.6s edge-selective delay with ±2.3% max error (>512µs), 70µA supply current at 10µs delay, and operation from –40°C to 125°C. It serves as a precision debouncer and noise discriminator in automotive sensor interfaces and industrial control timing circuits.
For engineers reviewing the LTC6994HDCB-1#TRPBF datasheet, LTC6994HDCB-1#TRPBF pinout, LTC6994HDCB-1#TRPBF application, or LTC6994HDCB-1#TRPBF equivalent, this page provides verified delay accuracy specs, DIVCODE-based NDIV configuration, thermal drift data across temperature, CMOS output drive capability, and validated automotive-grade packaging for high-reliability embedded timing design.
Technical Context
The LTC6994HDCB-1#TRPBF implements a master oscillator with tMASTER = 1µs × RSET/50kΩ, feeding an 8-step programmable divider (NDIV = 1, 8, 64, ..., 221) to set total delay tDELAY = NDIV × RSET/50kΩ × 1µs. Its internal 4-bit A/D converter reads VDIV to determine both NDIV and POL bit state.
As an LTC6994-1 variant, it delays only rising edges (POL = 0) or only falling edges (POL = 1), not both - unlike the LTC6994-2. The SET pin regulates VSET to 1.00V ±30mV, making delay accuracy dependent solely on RSET tolerance and inherent ∆tDELAY specification, not VSET drift.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Delay Range | 1µs to 33.6 seconds - supports ultra-low-power wake-up timers and long-interval system synchronization. |
| Delay Accuracy | ±2.3% max for tDELAY > 512µs - enables reliable pulse qualification without calibration in automotive ECU inputs. |
| Supply Voltage | 2.25V to 5.5V - compatible with Li-ion battery systems (3.0–4.2V) and 3.3V/5V logic domains. |
| Supply Current | 70µA at 10µs delay (V+ = 2.25V, RSET = 800kΩ) - extends battery life in portable diagnostic tools. |
| Operating Temp | –40°C to 125°C - qualified per AEC-Q100 for under-hood automotive applications. |
| Output Drive | CMOS output sourcing/sinking 20mA - directly drives LEDs, MOSFET gates, or logic inputs without buffering. |
| Start-Up Time | 500 × tMASTER (typical 500µs at RSET = 50kΩ) - ensures deterministic initialization after power-on reset. |
Pinout & Package
Package: 6-lead (2mm × 3mm) plastic DFN with exposed pad connected to GND; 1mm profile; RoHS-compliant lead-free finish (LFCT marking).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (Pin 4) | Logic input trigger | Accepts 0.3×V+ to 0.7×V+ hysteresis thresholds; rising or falling edge selected by POL bit for delay initiation. |
| GND (Pin 2) | Ground reference | Low-inductance ground plane connection required; exposed pad must be tied to GND for thermal and electrical performance. |
| SET (Pin 3) | Delay programming node | Sinks ISET = 1.25–20µA; voltage regulated to 1.00V ±30mV; connects to precision RSET (50k–800kΩ) for accurate tDELAY. |
| OUT (Pin 6) | CMOS output driver | Swings rail-to-rail (GND to V+); 30Ω typical output resistance; sources/sinks 20mA; no external pull-up needed. |
| V+ (Pin 1) | Power supply | 2.25–5.5V single supply; requires 0.1µF ceramic bypass capacitor directly to GND pin. |
| DIV (Pin 5) | Divider/polarity control | 4-bit A/D input; resistor divider sets VDIV/V+ ratio to select NDIV (1–221) and POL bit (rising/falling edge selection). |
Key Features
| Feature | Design Value |
|---|---|
| Edge-selective delay | LTC6994-1 functionality: delays either rising edge (POL=0) or falling edge (POL=1), enabling precise signal edge conditioning. |
| Dynamic DIVCODE update | Supports real-time NDIV reconfiguration via VDIV change; settling time = 16 × (∆DIVCODE + 6) × tMASTER - allows adaptive timing in closed-loop systems. |
| Low-jitter operation | 0.03%P-P jitter at NDIV = 4096 (5.5V supply) - critical for stable clock stretching and deterministic serial interface timing. |
| Noise discrimination | Rejects sub-1µs glitches via internal digital filter and edge-triggered timing - eliminates false triggers in high-EMI engine control environments. |
| Automotive qualification | AEC-Q100 Grade H (–40°C to 125°C) with controlled manufacturing - meets reliability requirements for safety-critical vehicle subsystems. |
Applications
| Engine Control Unit Input Debouncing | Industrial PLC Digital Input Filtering |
|---|---|
Use Scenario: Raw crankshaft position sensor signals contain mechanical bounce and EMI-induced spikes in automotive engines. IC Role / Device Role / Timing Role: LTC6994HDCB-1#TRPBF acts as a hardware-level pulse qualifier, delaying only valid rising edges with ≥10µs minimum pulse width. Use Value: Eliminates software debouncing overhead and prevents misfire detection due to false zero-crossing events. |
Use Scenario: Factory floor pushbuttons and limit switches generate contact bounce lasting 5–50ms in harsh industrial settings. IC Role / Device Role / Timing Role: LTC6994HDCB-1#TRPBF configured for falling-edge delay filters switch transitions before PLC logic sampling. Use Value: Reduces firmware complexity and ensures deterministic 10ms debounce window independent of CPU load or RTOS scheduling. |
| Battery-Powered Sensor Wake-Up Timer | High-Vibration Accelerometer Signal Conditioning |
Use Scenario: Portable gas detector sleeps between 30-second intervals, requiring ultra-low-power wake-up with precise timing. IC Role / Device Role / Timing Role: LTC6994HDCB-1#TRPBF generates 30s delay using RSET = 800kΩ and NDIV = 512, drawing only 65µA at 2.25V. Use Value: Extends coin-cell battery life beyond 2 years while maintaining ±2.3% timing accuracy across temperature. |
Use Scenario: MEMS accelerometers in vehicle crash sensors produce transient noise during high-g shock events. IC Role / Device Role / Timing Role: LTC6994HDCB-1#TRPBF qualifies valid acceleration pulses >2ms duration, rejecting sub-millisecond vibration artifacts. Use Value: Prevents false airbag deployment by enforcing minimum event duration before triggering safety logic. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar programmable delay applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6816EUT+T | Fixed 10ms debounce time; no resistor-programmable delay range; 5V-only supply; SOT-23-6 package. | Only suitable for standardized debounce intervals; lacks flexibility for custom timing or low-voltage operation. | Select when fixed 10ms filtering suffices and board space is constrained - but not for variable-delay or 2.25V systems. |
| SN74LVC1G123DBVR | Monostable multivibrator with 10ns–100s range via RC network; no internal oscillator; higher propagation delay (≥15ns); non-automotive temp grade. | Requires external capacitor; timing accuracy depends on C tolerance and leakage; not qualified for –40°C to 125°C operation. | Choose for cost-sensitive consumer designs where AEC-Q100 compliance and ±2.3% delay accuracy are not required. |
Compared with MAX6816EUT+T and SN74LVC1G123DBVR, the LTC6994HDCB-1#TRPBF delivers factory-trimmed oscillator stability, guaranteed automotive temperature performance, and resistor-programmable delay without external capacitors - making it uniquely suited for safety-critical timing where accuracy, reliability, and supply flexibility are mandatory.
Availability
LTC6994HDCB-1#TRPBF is available at Aetrix Electronics and suitable for automotive ECU design, industrial PLC input modules, and battery-powered sensor wake-up circuits requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC6994HDCB-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 LTC6994HDCB-1#TRPBF belongs to the TimerBlox® family - silicon timing devices designed for replacing discrete RC timers and crystal oscillators in space-constrained, high-reliability embedded systems requiring precise, programmable delay without software intervention.
FAQ
What is the maximum delay achievable with the LTC6994HDCB-1#TRPBF?
The LTC6994HDCB-1#TRPBF achieves up to 33.6 seconds delay using NDIV = 221 and RSET = 800kΩ. This is calculated as tDELAY = NDIV × RSET/50kΩ × 1µs = 2,097,152 × 800kΩ/50kΩ × 1µs = 33.55s. The datasheet specifies 33.6s as the practical maximum, confirmed across operating conditions for the LTC6994HDCB-1#TRPBF.
How does the LTC6994HDCB-1#TRPBF differ from the LTC6994HDCB-2#TRPBF?
The LTC6994HDCB-1#TRPBF delays only one edge - rising (POL = 0) or falling (POL = 1) - whereas the LTC6994HDCB-2#TRPBF delays both edges and adds output inversion capability. The LTC6994HDCB-1#TRPBF has no output polarity control beyond edge selection; its DIV pin's MSB (POL) solely determines which edge is delayed, not output logic state.
Can the LTC6994HDCB-1#TRPBF operate from a 2.5V supply?
Yes, the LTC6994HDCB-1#TRPBF operates from 2.25V to 5.5V, including 2.5V. At 2.25V, it maintains full functionality: 70µA supply current (RSET = 800kΩ), 20mA output drive, and ±2.3% delay accuracy for tDELAY > 512µs. Propagation delay increases to 24ns, and VOH/VOL remain within spec per the Electrical Characteristics table.
Is the LTC6994HDCB-1#TRPBF pin-compatible with other TimerBlox delay blocks?
No - the LTC6994HDCB-1#TRPBF uses a unique 6-pin DFN (DCB) footprint with specific pin assignments (IN, GND, SET, OUT, V+, DIV). Other TimerBlox devices like LTC6993 or LTC6995 use different pinouts and functions. Substituting requires PCB redesign; the LTC6994HDCB-1#TRPBF pinout is fixed per the DCB package drawing in the datasheet.
What is the purpose of the exposed pad on the LTC6994HDCB-1#TRPBF DFN package?
The exposed pad (Pin 7) on the LTC6994HDCB-1#TRPBF DFN package is internally connected to GND and must be soldered to a PCB GND plane for optimal thermal dissipation (θJA = 64°C/W) and electrical noise immunity. While PCB connection is optional per the datasheet, omitting it degrades thermal performance and may increase jitter in high-frequency timing applications.
LTC6994HDCB-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:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-DFN (2x3)
LTC6994HDCB-1#TRPBF FAQ
1.How can I place an order for LTC6994HDCB-1#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC6994HDCB-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 LTC6994HDCB-1#TRPBF reliable?
The price and inventory of LTC6994HDCB-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 LTC6994HDCB-1#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC6994HDCB-1#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC6994HDCB-1#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC6994HDCB-1#TRPBF?
LTC6994HDCB-1#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC6994HDCB-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 LTC6994HDCB-1#TRPBF?
For technical support, including LTC6994HDCB-1#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC6994HDCB-1#TRPBF requirements.
6.How does Aetrix verify that LTC6994HDCB-1#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC6994HDCB-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 LTC6994HDCB-1#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC6994HDCB-1#TRPBF?
All LTC6994HDCB-1#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC6994HDCB-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 LTC6994HDCB-1#TRPBF part is unused and in its original packaging.
Return procedure for LTC6994HDCB-1#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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