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Analog Devices Inc./Maxim Integrated DS1044R-7
- Part No.:
- DS1044R-7
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Delay Lines
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
DS1044R-7.pdf
- Description:
- IC DELAY LINE 7NS 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,922
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Product details
Overview
DS1044R-7 from Dallas Semiconductor is a 4-channel silicon delay line IC delivering precise, independent 7 ns nominal propagation delays (tPLH/tPHL) with ±1.5 ns initial tolerance and ±1.0 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 leading/trailing edge accuracy. It serves in high-speed digital timing alignment for logic synchronization and clock deskewing.
For engineers reviewing the DS1044R-7 datasheet, DS1044R-7 pinout, DS1044R-7 application, or DS1044R-7 equivalent, key selection criteria include guaranteed 7 ns delay stability across voltage/temperature, 14-pin SOIC (150 mil) packaging, four buffered outputs with no internal interconnect, and compatibility with standard 5 V TTL/LS logic families.
Technical Context
The DS1044R-7 implements four electrically isolated, logic-buffered delay paths within a single monolithic silicon die-each path provides identical 7 ns nominal tPLH/tPHL delay under +5 V, 25°C conditions. Delay accuracy is specified for both rising and falling edges, with symmetrical rise/fall times ≤2.5 ns and input pulse width ≥100% of tap delay.
It operates strictly at +5 V (4.75–5.25 V), draws 45 mA typical active current, and supports full 0°C–70°C industrial temperature range. The device requires no external components, has no internal feedback or programmability, and relies on fixed all-silicon delay elements-not RC or analog-based timing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal delay | 7 ns per output (tPLH/tPHL); enables precise 7 ns skew correction between parallel data/clock lines |
| Initial delay tolerance | ±1.5 ns at +25°C, VCC = 5.0 V; sets baseline timing margin for board-level timing budgeting |
| Tolerance over temp/voltage | ±1.0 ns (0°C–70°C, 4.75–5.25 V); ensures total delay deviation stays within ±2.5 ns across operating range |
| Output drive strength | 12 mA sink / –1.0 mA source at VOH = 4.0 V, VOL = 0.5 V; directly interfaces 74F04-equivalent loads without buffering |
| Rise/fall time | ≤2.5 ns (20%–80%); maintains signal integrity for >200 MHz edge rates in high-speed logic systems |
| Supply current | 45 mA typical at VCC = 5.25 V, 1 µs period; defines power rail demand for multi-delay-line timing subsystems |
Pinout & Package
DS1044R-7 is housed in a 14-pin SOIC package (150 mil width), pin-compatible with the DIP variant but optimized for surface-mount assembly. All NC pins are unconnected and must remain floating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 3, 8, 14 | NC | No internal connection; must be left unconnected on PCB |
| 2, 4, 5, 6 | IN1–IN4 | Independent TTL/LS-compatible inputs; each triggers its corresponding delayed output |
| 7, 9, 10, 11 | OUT1–OUT4 | Buffered, delayed outputs; each delivers identical 7 ns delay with full LS-TTL drive capability |
| 12 | VCC | +5 V power supply pin; requires local 0.1 µF ceramic decoupling to GND |
| 13 | GND | Ground reference for all inputs, outputs, and internal circuitry; must connect to low-impedance system ground plane |
Key Features
| Feature | Design Value |
|---|---|
| Four independent delay paths | Enables simultaneous, non-interacting timing adjustment of four signal lines-no crosstalk or shared delay element limitations |
| All-silicon construction | Eliminates aging, drift, and environmental sensitivity associated with RC or crystal-based delay solutions |
| Leading & trailing edge precision | Maintains 50% duty cycle integrity across all outputs-critical for clock distribution and synchronous sampling |
| Standard 14-pin SOIC footprint | Supports automated SMT placement and reflow (vapor phase, IR, wave solderable); compatible with legacy DIP layouts via adapter |
| 10 LS-TTL load drive per output | Drives fanout without external buffers-reduces component count and layout complexity in dense logic systems |
Applications
| Logic Skew Compensation | High-Speed Clock Deskewing |
|---|---|
Use Scenario: Aligning arrival times of multiple parallel data signals in FPGA-to-ASIC interfaces where trace length mismatches cause setup/hold violations. IC Role / Device Role / Timing Role: DS1044R-7 applies identical 7 ns delay to shorter traces to match longer-path signals-restoring synchronous capture timing. Use Value: Eliminates need for manual PCB trace tuning or complex programmable delay ICs; achieves sub-nanosecond alignment repeatability. | Use Scenario: Equalizing clock arrival at multiple memory controller inputs in DDR2/DDR3 subsystems with distributed clock trees. IC Role / Device Role / Timing Role: DS1044R-7 inserts calibrated 7 ns delay on early-arriving clock branches to synchronize edge transitions across all destinations. Use Value: Maintains tight clock skew (<500 ps) required for reliable double-data-rate sampling without custom ASIC timing blocks. |
| Digital Test Equipment Timing | Legacy Bus Signal Alignment |
Use Scenario: Generating precisely offset trigger pulses for multi-channel oscilloscopes or logic analyzers requiring deterministic inter-channel delay. IC Role / Device Role / Timing Role: DS1044R-7 provides four independent, stable 7 ns delays from a common input-enabling synchronized channel triggering. Use Value: Replaces discrete delay-line modules with predictable, temperature-stable performance and minimal board space. | Use Scenario: Matching signal propagation in industrial backplane buses (e.g., VME, Multibus) where legacy TTL devices exhibit varying gate delays. IC Role / Device Role / Timing Role: DS1044R-7 compensates for slower peripheral response by delaying faster master-side control signals to meet slave setup windows. Use Value: Extends usable life of aging bus architectures without redesigning timing-critical control logic. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed fixed-delay line applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DS1044-7 (DIP) | Same electrical specs and delay value; differs only in 14-pin PDIP package instead of SOIC | Preferred for prototyping, through-hole assembly, or legacy DIP-based systems | Select DS1044-7 when manual soldering, breadboarding, or socket-based testing is required |
| MC100ELT24DG | 4-channel ECL/TTL translator with 2.4 ns typical propagation delay; not a fixed-delay device-delay varies with loading and supply | Suitable for level-shifting with minimal added delay, not for precise skew correction | Choose MC100ELT24DG only if signal translation is primary need and <1 ns delay stability is not required |
Compared with DS1044-7 and MC100ELT24DG, the DS1044R-7 uniquely delivers factory-trimmed 7 ns delay in a surface-mount package with ±1.0 ns thermal/voltage stability-making it the only option among the three qualified for deterministic, repeatable skew management in production-grade 5 V TTL systems.
Availability
DS1044R-7 is available at Aetrix Electronics and suitable for logic skew compensation, high-speed clock deskewing, digital test equipment timing, and legacy bus signal alignment requiring stable component supply and long-term obsolescence support.
Supply support for DS1044R-7 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, then Analog Devices) specialized in precision timing, memory, and mixed-signal ICs for industrial and communications infrastructure.
The DS1044 series was designed specifically for fixed, high-accuracy digital delay applications in 5 V TTL/LS logic systems-prioritizing edge fidelity, thermal stability, and multi-channel independence over programmability or wide voltage range.
FAQ
What is the guaranteed delay accuracy of DS1044R-7 over its full operating temperature and voltage range?
The DS1044R-7 guarantees a total delay deviation of ±2.5 ns maximum: ±1.5 ns initial tolerance at +25°C/VCC=5.0 V, plus ±1.0 ns additional variation across 0°C–70°C and 4.75 V–5.25 V. This applies identically to both tPLH and tPHL for all four outputs, measured at the 1.5 V switching threshold.
Can DS1044R-7 be used with 3.3 V logic systems?
No. The DS1044R-7 is specified exclusively for +5 V operation (4.75–5.25 V). Its input thresholds (VIH ≥2.2 V, VIL ≤0.8 V) and output drive levels (VOH ≥4.0 V, VOL ≤0.5 V) are designed for TTL/LS compatibility. Using it with 3.3 V supplies risks undefined logic states, excessive current draw, or permanent damage due to absolute maximum ratings violation.
Are the four delay paths in DS1044R-7 electrically isolated from each other?
Yes. The DS1044R-7 contains four fully independent delay circuits sharing only VCC and GND rails. There is no internal coupling, shared delay element, or cross-talk path between IN1/OUT1, IN2/OUT2, IN3/OUT3, and IN4/OUT4. Each channel operates autonomously with identical 7 ns delay and timing characteristics.
Does DS1044R-7 require external passive components for stable operation?
No. The DS1044R-7 is a self-contained delay line requiring only proper power supply decoupling: a 0.1 µF ceramic capacitor placed between VCC (pin 12) and GND (pin 13) as close to the package as possible. No resistors, capacitors, or inductors are needed for basic delay functionality or signal integrity.
How does DS1044R-7 differ from DS1044-7 in terms of performance and compatibility?
The DS1044R-7 and DS1044-7 share identical electrical specifications, delay value (7 ns), tolerances, timing parameters, and pin functions. Their sole difference is packaging: DS1044R-7 uses a 14-pin SOIC (150 mil), while DS1044-7 uses a 14-pin PDIP. Both are drop-in replacements electrically and functionally-only PCB footprint and assembly process differ.
DS1044R-7 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:
- 7ns
- Tap Increment:
- -
- Available Total Delays:
- 7ns
- 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-7 FAQ
1.How can I place an order for DS1044R-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DS1044R-7 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-7 reliable?
The price and inventory of DS1044R-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS1044R-7 is usually 5 days.
3.What payment methods are accepted for DS1044R-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1044R-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS1044R-7?
DS1044R-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS1044R-7 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-7?
For technical support, including DS1044R-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1044R-7 requirements.
6.How does Aetrix verify that DS1044R-7 is sourced from the original manufacturer or authorized distributors?
All DS1044R-7 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-7 meets industry standards.
7.What is the process for return or replacement of DS1044R-7?
All DS1044R-7 units undergo pre-shipment inspection (PSI). If there is an issue with DS1044R-7, 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-7 part is unused and in its original packaging.
Return procedure for DS1044R-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DS1044R-7 Tags
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