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Analog Devices Inc. LTC6994HS6-1#WTRMPBF
- Part No.:
- LTC6994HS6-1#WTRMPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Delay Lines
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
LTC6994HS6-1#WTRMPBF.pdf
- Description:
- TIMERBLOX: DELAY BLOCK/ DEBOUNCE
- Quantity:
- Payment:
- Shipping:
Inventory:448
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Product details
Overview
LTC6994HS6-1#WTRMPBF from Analog Devices is a TimerBlox® programmable delay block (LTC6994-1 variant) in TSOT-23-6 package, delivering 1µs to 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 or noise discriminator in automotive sensor interfaces.
For engineers reviewing the LTC6994HS6-1#WTRMPBF datasheet, LTC6994HS6-1#WTRMPBF pinout, LTC6994HS6-1#WTRMPBF application, or LTC6994HS6-1#WTRMPBF equivalent, this page provides verified timing accuracy, automotive-grade temperature validation, SOT-23-6 terminal mapping, and drop-in alternatives for switch debounce and pulse qualification designs.
Technical Context
The LTC6994HS6-1#WTRMPBF implements a master oscillator (tMASTER = RSET/50kΩ × 1µs) 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 DIV pin voltage to select both NDIV and polarity mode (POL = 0 delays rising edge only).
It features hysteresis on the IN pin (VIN(RISING) ≈ 0.55×V+ + 185mV), regulated 1V SET pin reference (±30mV), and CMOS output capable of sourcing/sinking 20mA. Delay settling occurs within 6×tMASTER, and start-up time is 500×tMASTER (typ. 500µs at RSET = 50kΩ).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Delay Range | 1µs to 33.6 seconds - supports both microsecond-level signal conditioning and multi-second system timing. |
| Delay Accuracy | ±2.3% max for tDELAY > 512µs - enables reliable pulse qualification without calibration. |
| Supply Voltage | 2.25V to 5.5V - compatible with 3.3V and 5V logic domains and battery-powered systems. |
| Operating Temp | –40°C to 125°C - AEC-Q100 qualified for under-hood automotive applications. |
| Supply Current | 70µA at 10µs delay (V+ = 2.25V) - ultra-low power for always-on debounce circuits. |
| Output Drive | ±20mA CMOS - directly drives LEDs, logic inputs, or small MOSFET gates without buffering. |
| Start-Up Time | 500µs typical (RSET = 50kΩ) - ensures deterministic behavior after power-on reset. |
Pinout & Package
Package: 6-Lead Plastic TSOT-23 (S6), 1mm profile, lead-free, RoHS-compliant. Exposed pad optional for thermal relief.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (Pin 1) | Logic Input | Rising-edge sensitive input (POL = 0); hysteresis prevents false triggering on noisy signals. |
| GND (Pin 2) | Ground Reference | Low-inductance return path for SET regulation and output switching; connects to exposed pad. |
| SET (Pin 3) | Delay Programming | Sinks ISET = VSET/RSET; VSET regulated to 1.00V ±30mV for stable oscillator frequency. |
| DIV (Pin 4) | Divider Control | Voltage-programmed 4-bit A/D input selecting NDIV (1–221) and POL bit (rising/falling edge mode). |
| V+ (Pin 5) | Power Supply | 2.25V–5.5V single supply; requires 0.1µF bypass capacitor directly to GND for low-noise operation. |
| OUT (Pin 6) | CMOS Output | Full-rail output (GND to V+) with 30Ω typical drive impedance; sources/sinks 20mA. |
Key Features
| Feature | Design Value |
|---|---|
| Edge-selective delay | LTC6994HS6-1#WTRMPBF delays only rising OR falling edges (not both), enabling asymmetric pulse shaping. |
| Resistor-programmable timing | Single RSET (50kΩ–800kΩ) sets master oscillator; no external clock or crystal required. |
| Noise discrimination | Hysteresis + programmable delay rejects sub-microsecond glitches while passing valid transitions. |
| Automotive qualification | AEC-Q100 Grade H (–40°C to 125°C) with controlled manufacturing - validated for safety-critical vehicle systems. |
| Low-power idle state | Idle current drops to 65µA (V+ = 2.25V, RSET = 800kΩ, NDIV ≥ 512) - extends battery life in portable equipment. |
Applications
| Automotive Door Switch Debouncing | Industrial PLC Input Filtering |
|---|---|
|
Use Scenario: Mechanical door latch switches generate contact bounce lasting 1–10ms in high-vibration vehicle environments. IC Role / Device Role / Timing Role: LTC6994HS6-1#WTRMPBF configured with RSET = 100kΩ and DIV = 8 delivers 800µs delay to suppress all bounces before asserting clean signal. Use Value: Eliminates need for RC filters and firmware debouncing, reducing BOM count and MCU interrupt load. |
Use Scenario: Factory floor sensors feed noisy 24V digital inputs into PLC modules via optocouplers with slow rise times. IC Role / Device Role / Timing Role: LTC6994HS6-1#WTRMPBF placed after optocoupler output acts as hardware pulse qualifier, rejecting EMI-induced spikes < 5µs. Use Value: Prevents spurious PLC state changes without adding software latency or complex FPGA logic. |
| Portable Medical Device Power-On Sequencing | High-Acceleration Inertial Sensor Interface |
|
Use Scenario: Battery-powered glucose monitor requires precise 10ms delay between MCU wake-up and sensor activation to avoid inrush current. IC Role / Device Role / Timing Role: LTC6994HS6-1#WTRMPBF (RSET = 500kΩ, NDIV = 1) generates exact 10ms delay using internal oscillator - no timing capacitor drift. Use Value: Guarantees repeatable sequencing across temperature and battery voltage (2.25–5.5V), improving device reliability. |
Use Scenario: MEMS accelerometers in airbag controllers output short pulses during crash events, but experience high-frequency vibration noise. IC Role / Device Role / Timing Role: LTC6994HS6-1#WTRMPBF (RSET = 200kΩ, NDIV = 64) qualifies pulses > 12.8ms as valid crash signals, ignoring sub-10ms noise. Use Value: Enables deterministic crash detection without false triggers, meeting ISO 26262 ASIL-B requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar programmable delay applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC6994HS6-2#WTRMPBF | Delays both rising and falling edges; adds output inversion option via POL bit. | Required when symmetric delay on both edges or inverting logic function is needed. | Select LTC6994HS6-2#WTRMPBF only if dual-edge delay or output polarity control is mandatory. |
| MAX6816EUT+T | Fixed 10ms debounce time; no resistor programming; 2.7–5.5V supply; 1.5µA quiescent current. | Only suitable for fixed-delay applications; lacks adjustable timing range or edge selectivity. | Choose MAX6816EUT+T for cost-sensitive, single-delay-point designs where programmability is unnecessary. |
Compared with LTC6994HS6-1#WTRMPBF, the -2 variant adds functional flexibility at the cost of design complexity, while MAX6816EUT+T trades programmability for ultra-low power and simplicity - selection depends on whether adjustable delay, edge selectivity, or minimal quiescent current dominates the design priority.
Availability
LTC6994HS6-1#WTRMPBF is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC input conditioning, and portable medical device power sequencing requiring stable component supply across extended temperature ranges.
Supply support for LTC6994HS6-1#WTRMPBF 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 TimerBlox® family - including LTC6994HS6-1#WTRMPBF - was designed to replace discrete RC timers and microcontroller-based delays with pin-configurable, high-accuracy silicon timing blocks for robust embedded systems.
FAQ
What is the maximum delay achievable with LTC6994HS6-1#WTRMPBF?
The LTC6994HS6-1#WTRMPBF supports a maximum delay of 33.6 seconds, achieved when RSET = 800kΩ and NDIV = 221 (2,097,152). This is confirmed in the Electrical Characteristics table (tDELAY MAX = 33.55 sec) and Figure 2 of the datasheet. The value is derived from the equation tDELAY = NDIV × RSET/50kΩ × 1µs, with tolerance and temperature drift accounted for in the ±2.3% accuracy spec for delays > 512µs.
Does LTC6994HS6-1#WTRMPBF support both rising and falling edge delay?
No, LTC6994HS6-1#WTRMPBF is the -1 variant and delays only one edge type per configuration: rising edge when POL = 0 (DIVCODE 0–7), or falling edge when POL = 1 (DIVCODE 8–15). This is explicitly stated in the "DEVICE DELAY FUNCTION" diagram and PIN FUNCTIONS section. The -2 variant (LTC6994HS6-2#WTRMPBF) is required for dual-edge delay capability.
What is the operating temperature range for LTC6994HS6-1#WTRMPBF?
LTC6994HS6-1#WTRMPBF is rated for –40°C to 125°C, designated by the 'H' grade in its part number and confirmed in the ORDER INFORMATION table. It is AEC-Q100 qualified for automotive applications, with full electrical specifications guaranteed across this range (denoted by 'l' symbol in Electrical Characteristics). This exceeds commercial (C) and industrial (I) grades, making it suitable for under-hood and engine-control use cases.
Can LTC6994HS6-1#WTRMPBF be used with a 2.5V supply?
Yes, LTC6994HS6-1#WTRMPBF operates from 2.25V to 5.5V, so 2.5V is fully supported. Electrical characteristics including delay accuracy (±2.3%), supply current (70µA typ. at 10µs delay), and output drive (±20mA) are specified down to 2.25V. Propagation delay increases to 24ns at 2.25V (vs. 10ns at 5.5V), and VOL rises to 0.07V at 8mA sink - all verified in the Electrical Characteristics table.
How is the delay time programmed on LTC6994HS6-1#WTRMPBF?
Delay is programmed using two external resistors: RSET (between SET and GND) sets the master oscillator period (tMASTER = RSET/50kΩ × 1µs), and a resistor divider on the DIV pin selects NDIV (1 to 221) and POL mode. Total delay is tDELAY = NDIV × tMASTER. Table 1 in the datasheet provides recommended 1% resistor values for each DIVCODE; for example, RSET = 100kΩ and DIV divider yielding DIVCODE = 3 gives tDELAY = 512 × (100k/50k) × 1µs = 1.024ms.
LTC6994HS6-1#WTRMPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- TimerBlox®
- Package/Case:
- SOT-23-6 Thin, TSOT-23-6
- 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:
- TSOT-23-6
LTC6994HS6-1#WTRMPBF FAQ
1.How can I place an order for LTC6994HS6-1#WTRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC6994HS6-1#WTRMPBF 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 LTC6994HS6-1#WTRMPBF reliable?
The price and inventory of LTC6994HS6-1#WTRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC6994HS6-1#WTRMPBF is usually 5 days.
3.What payment methods are accepted for LTC6994HS6-1#WTRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC6994HS6-1#WTRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC6994HS6-1#WTRMPBF?
LTC6994HS6-1#WTRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC6994HS6-1#WTRMPBF 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 LTC6994HS6-1#WTRMPBF?
For technical support, including LTC6994HS6-1#WTRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC6994HS6-1#WTRMPBF requirements.
6.How does Aetrix verify that LTC6994HS6-1#WTRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC6994HS6-1#WTRMPBF 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 LTC6994HS6-1#WTRMPBF meets industry standards.
7.What is the process for return or replacement of LTC6994HS6-1#WTRMPBF?
All LTC6994HS6-1#WTRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC6994HS6-1#WTRMPBF, 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 LTC6994HS6-1#WTRMPBF part is unused and in its original packaging.
Return procedure for LTC6994HS6-1#WTRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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