SN65ELT21DR Texas Instruments Integrated Circuit (Other) In Stock
The SN65ELT21DR is a 5-V PECL-to-TTL translator IC from Texas Instruments. It features low-skew clock driver architecture with 20 pF load capacitance and 24 mA output current. From $1.27, available in SOIC-8 package with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Other
- Pin Count
- 8
- Lifecycle
- ACTIVE
- Datasheet
- SN65ELT21DR Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $1.2700(MOQ 1)
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 5-V PECL-to-TTL signal translation for seamless interface between ECL and TTL logic families
- Low skew clock driver design ensures minimal propagation delay variation across outputs
- 24 mA output current (I_ol) supports driving standard TTL loads without additional buffering
- Single-function device in compact SOIC-8 (R-PDSO-G8) package for space-constrained designs
- Pb-free (RoHS compliant) construction meeting JESD-609 e4 environmental standards
Applications
The SN65ELT21DR is widely used in high-speed digital systems requiring PECL-to-TTL level translation, such as clock distribution networks in telecommunications equipment and networking switches. It is also applied in test and measurement instruments, data storage systems, and FPGA-based designs where ECL clock signals must interface with TTL logic. Its low-skew characteristics make it ideal for synchronous systems demanding precise timing control.
Specifications
| Pbfree Code | Yes |
| YTEOL | 15 |
| Family | 65ELT |
| Input Conditioning | STANDARD |
| JESD-30 Code | R-PDSO-G8 |
| JESD-609 Code | e4 |
| Load Capacitance (CL) | 20pF |
| Logic IC Type | LOW SKEW CLOCK DRIVER |
| Max I(ol) | 0.024A |
| Number of Functions | 1 |
| Number of True Outputs | 1 |
| Package Body Material | PLASTIC/EPOXY |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Packing Method | TR |
| Peak Reflow Temperature (Cel) | 260 |
| Power Supply Current-Max (ICC) | 20mA |
| Prop. Delay@Nom-Sup | 4.5ns |
| Propagation Delay (tpd) | 4.5ns |
| Qualification Status | Not Qualified |
| Supply Voltage-Max (Vsup) | 5.7V |
| Supply Voltage-Min (Vsup) | 4.2V |
| Supply Voltage-Nom (Vsup) | 5V |
| Surface Mount | YES |
| Technology | BICMOS |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | Nickel/Palladium/Gold (Ni/Pd/Au) |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Package | Other |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | 5A991.B.1 |
| HTS Code | 8542.39.00.90 |
| Country of Origin | Malaysia |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for SN65ELT21DR:
Driver, 65ELT Series, 1 True Output(s), 0 Inverted Output(s), PDSO8
Frequently Asked Questions
What is the input voltage standard supported by the SN65ELT21DR?
The SN65ELT21DR supports 5-V PECL (Positive Emitter-Coupled Logic) inputs. PECL signals are typically referenced to VCC and swing between VCC-1.3 V and VCC-0.3 V. The device translates these PECL input levels to standard TTL-compatible output levels, enabling interoperability between ECL and TTL logic domains in mixed-signal digital systems.
What are the key electrical characteristics of the SN65ELT21DR?
Key specifications include a 5 V supply voltage, 20 pF rated load capacitance (CL), and a maximum output low current (I_ol) of 24 mA. It is classified as a low-skew clock driver with a single function, housed in an 8-pin SOIC package (JESD-30 code R-PDSO-G8). These parameters make it suitable for clock distribution in high-speed digital designs.
What package does the SN65ELT21DR come in and is it RoHS compliant?
The SN65ELT21DR is available in an 8-pin Small Outline IC (SOIC) surface-mount package, designated R-PDSO-G8 per JESD-30. It is fully Pb-free and RoHS compliant, meeting JESD-609 e4 environmental requirements. The 'DR' suffix in the part number indicates the standard SOIC-8 tape-and-reel packaging option for automated assembly.
What are typical applications for the SN65ELT21DR?
The SN65ELT21DR is commonly used in clock distribution and signal translation applications where PECL clock signals must drive TTL logic circuits. Typical use cases include telecom line cards, Ethernet switches, FPGA development boards, and high-speed data acquisition systems. Its low-skew design is especially valuable in synchronous digital systems where timing accuracy is critical.
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About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $2.7600 | $2.76 |
| 151+ | $1.9900 | $300.49 |
| 500+ | $1.4300 | $715.00 |
| 1000+ | $1.3500 | $1350.00 |
| 10000+ | $1.2700 | $12700.00 |
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