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Analog Devices Inc./Maxim Integrated DS1044R-20
- Part No.:
- DS1044R-20
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Delay Lines
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
DS1044R-20.pdf
- Description:
- IC DELAY LINE 20NS 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,422
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Product details
Overview
DS1044R-20 from Dallas Semiconductor is a 4-channel silicon delay line IC delivering precise, independent 20 ns nominal propagation delays (tPLH/tPHL) with ±1.5 ns initial tolerance and ±1.5 ns additional variation over 0°C–70°C and 4.75 V–5.25 V supply. Each output drives up to 10 LS-TTL loads and preserves input signal symmetry via matched leading/trailing edge accuracy. It serves in high-speed digital timing alignment for logic synchronization and clock deskewing.
For engineers reviewing the DS1044R-20 datasheet, DS1044R-20 pinout, DS1044R-20 application, or DS1044R-20 equivalent, this page provides verified delay specifications, SOIC-14 package details, input/output terminal roles, thermal/voltage stability data, and functional alternatives for logic-level timing correction circuits.
Technical Context
The DS1044R-20 implements four independent buffered delay paths within a single monolithic silicon die, each with identical 20 ns nominal tPLH/tPHL under +25°C and VCC = 5.0 V. Delay accuracy is specified for both rising and falling edges at the 1.5 V switching threshold, with no duty cycle dependency beyond pulse width ≥100% of tap delay.
It operates exclusively at +5 V (4.75–5.25 V), draws 45 mA typical active current, and features TTL-compatible input thresholds (VIH ≥ 2.2 V, VIL ≤ 0.8 V) and output drive capability (IOL = 12 mA, IOH = –1.0 mA). Power-up time is 100 ms; rise/fall times are 2.0–2.5 ns into 15 pF.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Delay | 20 ns per output - fixed, factory-trimmed propagation delay for timing alignment |
| Initial Tolerance | ±1.5 ns - guaranteed delay deviation at +25°C, VCC = 5.0 V |
| Temp/Voltage Tolerance | ±1.5 ns - added variation across full operating range (0°C–70°C, 4.75–5.25 V) |
| Supply Voltage | 4.75 V to 5.25 V - strict +5 V operation; no 3.3 V support |
| Output Drive | 10 LS-TTL loads - sufficient fanout for legacy TTL logic interfacing |
| Rise/Fall Time | 2.0–2.5 ns - fast edge control enabling sub-ns jitter margin in synchronized systems |
| Input Capacitance | 10 pF - low loading on upstream drivers, minimizing signal distortion |
Pinout & Package
DS1044R-20 is housed in a 14-pin SOIC (150 mil) package with standard JEDEC MS-012AC footprint. Pin 1 is marked by notch or dot; pins are numbered counter-clockwise from top-left corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC (Pin 14) | Power Supply | +5 V supply input; requires local 0.1 µF bypass capacitor |
| GND (Pin 7) | Ground Reference | Common return path for all inputs, outputs, and internal circuitry |
| IN1–IN4 (Pins 8–11) | Digital Inputs | TTL-compatible signal entry points; each independently delayed |
| OUT1–OUT4 (Pins 2,4,5,6) | Delayed Outputs | Buffered, symmetrical-delayed replicas of respective inputs |
| NC (Pins 1,3,12,13) | No Connection | Unbonded pins; must remain unconnected and unstubbed |
Key Features
| Feature | Design Value |
|---|---|
| All-silicon construction | Eliminates aging drift and mechanical failure modes inherent in analog RC or crystal-based delay solutions |
| Matched leading/trailing edge precision | Maintains 50% duty cycle integrity across all four outputs, critical for clock distribution |
| Four independent buffered delays | Enables parallel timing correction without inter-channel crosstalk or shared loading effects |
| ±1.5 ns initial delay tolerance | Reduces need for system-level calibration in production test environments |
| Vapor phase/IR/wave solder compatible | Supports automated PCB assembly without thermal damage to timing performance |
Applications
| Logic Synchronization | Bus Skew Correction |
|---|---|
Use Scenario: Aligning arrival times of multiple asynchronous control signals entering a state machine or FPGA I/O bank. IC Role / Device Role / Timing Role: DS1044R-20 provides deterministic, channel-isolated delay to equalize path skew between enable, latch, and strobe lines. Use Value: Enables reliable setup/hold timing margins without custom PCB trace tuning or discrete RC networks. | Use Scenario: Compensating for length mismatches in parallel address/data buses driving memory or peripheral controllers. IC Role / Device Role / Timing Role: DS1044R-20 applies identical 20 ns delay to selected bus lines to realign sampling windows at the receiver. Use Value: Restores synchronous read/write timing compliance where trace-length differences exceed 200 ps. |
| Test Equipment Timing | Digital Signal Integrity |
Use Scenario: Generating precisely offset trigger pulses for multi-channel oscilloscopes or logic analyzers. IC Role / Device Role / Timing Role: DS1044R-20 delivers four stable, temperature-invariant delay taps from a common input clock. Use Value: Replaces manual coaxial delay lines with repeatable, compact, and board-mountable timing control. | Use Scenario: Restoring edge symmetry in high-speed digital waveforms degraded by transmission line reflections or driver asymmetry. IC Role / Device Role / Timing Role: DS1044R-20 corrects duty cycle distortion by applying matched delay to one edge path in a dual-edge sampling circuit. Use Value: Improves eye diagram opening and reduces bit error rate in marginal signal integrity conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 4-channel fixed-delay line applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DS1044-20 (DIP) | Same electrical specs and delay value; differs only in 14-pin PDIP package (vs. SOIC) | Preferred for prototyping, through-hole assembly, or legacy board designs requiring DIP footprint | Select DS1044-20 when manual soldering or socket-based testing is required. |
| MC100EP195DG | 5.0 V ECL-compatible; 2.5 ns typical delay; differential PECL outputs; higher speed but different logic family | Suitable for high-frequency (>100 MHz) ECL systems; not TTL-compatible or drop-in replaceable | Choose MC100EP195DG only when ECL signaling, sub-ns resolution, or differential outputs are mandatory. |
Compared with DS1044-20 (DIP), the DS1044R-20 offers identical timing performance in surface-mount form for automated production; compared with MC100EP195DG, it provides TTL compatibility and simpler power delivery but lacks differential signaling or sub-ns granularity.
Availability
DS1044R-20 is available at Aetrix Electronics and suitable for logic synchronization, bus skew correction, test equipment timing, and digital signal integrity applications requiring stable component supply and long-term obsolescence management.
Supply support for DS1044R-20 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
Dallas Semiconductor (now part of Maxim Integrated, a subsidiary of Analog Devices) specializes in precision timing, memory, and mixed-signal ICs for industrial and embedded systems.
The DS1044 series was designed specifically for high-reliability, fixed-value digital delay applications where silicon-based repeatability and temperature stability surpass RC or analog alternatives.
FAQ
What is the nominal propagation delay of the DS1044R-20?
The DS1044R-20 has a nominal propagation delay of 20 ns for each of its four outputs (tPLH and tPHL), measured at the 1.5 V switching threshold under +25°C and VCC = 5.0 V. This value is factory-trimmed and specified in Table 1 of the official datasheet. The DS1044R-20 maintains this delay with ±1.5 ns initial tolerance and an additional ±1.5 ns variation across temperature and supply voltage.
Is the DS1044R-20 compatible with 3.3 V logic systems?
No, the DS1044R-20 is strictly a +5 V device with absolute maximum VCC of +7.0 V and minimum operating VCC of 4.75 V. Its input thresholds (VIH ≥ 2.2 V, VIL ≤ 0.8 V) and output drive levels are optimized for TTL/LS-TTL interfaces. Using DS1044R-20 in a 3.3 V system risks undriven inputs, insufficient noise margin, and potential damage if VCC is undersupplied. For 3.3 V applications, consider level-shifting or alternative delay ICs.
How many loads can each output of the DS1044R-20 drive?
Each output of the DS1044R-20 is rated to drive up to 10 LS-TTL loads, corresponding to an output sink current (IOL) of 12 mA and source current (IOH) of –1.0 mA under VCC = 4.75 V. This fanout capability ensures robust signal integrity when interfacing with legacy TTL logic families. Exceeding this load count may degrade delay accuracy and edge fidelity in the DS1044R-20.
Does the DS1044R-20 require external components for basic operation?
The DS1044R-20 requires only a 0.1 µF ceramic bypass capacitor between VCC (Pin 14) and GND (Pin 7) placed near the package. No external resistors, capacitors, or trimming components are needed - all delay values are internally fixed and factory-calibrated. This minimal external component requirement simplifies layout and enhances reliability of the DS1044R-20 in timing-critical circuits.
What is the operating temperature range for the DS1044R-20?
The DS1044R-20 is specified for commercial-grade operation from 0°C to +70°C ambient temperature. Its delay stability, input/output thresholds, and DC/AC parameters are guaranteed across this full range when supplied with 4.75 V to 5.25 V. Storage temperature extends to –55°C to +125°C, but functional operation outside 0°C–70°C is not characterized or warranted for the DS1044R-20.
DS1044R-20 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Number of Taps/Steps:
- -
- Function:
- Multiple, NonProgrammable
- Delay to 1st Tap:
- 20ns
- Tap Increment:
- -
- Available Total Delays:
- 20ns
- Number of Independent Delays:
- 4
- Voltage - Supply:
- 4.75V ~ 5.25V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
DS1044R-20 FAQ
1.How can I place an order for DS1044R-20 through Aetrix?
Please submit a Request for Quotation (RFQ) for DS1044R-20 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 DS1044R-20 reliable?
The price and inventory of DS1044R-20 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS1044R-20 is usually 5 days.
3.What payment methods are accepted for DS1044R-20?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1044R-20 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS1044R-20?
DS1044R-20 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS1044R-20 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 DS1044R-20?
For technical support, including DS1044R-20 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1044R-20 requirements.
6.How does Aetrix verify that DS1044R-20 is sourced from the original manufacturer or authorized distributors?
All DS1044R-20 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 DS1044R-20 meets industry standards.
7.What is the process for return or replacement of DS1044R-20?
All DS1044R-20 units undergo pre-shipment inspection (PSI). If there is an issue with DS1044R-20, 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 DS1044R-20 part is unused and in its original packaging.
Return procedure for DS1044R-20:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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