TLK2521IPAP Texas Instruments Integrated Circuit (Quad Flat Packages) In Stock
TLK2521IPAP is a dual-channel multi-rate gigabit transceiver supporting serial data rates from 1.0 Gbps to 2.5 Gbps per channel, operating from a 2.5 V supply with integrated CDR and PLL for clock recovery, housed in a 64-pin PowerPAD TQFP package for high-speed backplane, Gigabit Ethernet, and SONET/SDH line card designs.
- Manufacturer
- Texas Instruments
- Package
- Quad Flat Packages
- Pin Count
- 64
- Lifecycle
- OBSOLETE
- Datasheet
- TLK2521IPAP Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $87.3135(MOQ 2)
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of TLK2521IPAP?
- Dual-channel serial transceiver supporting 1.0 Gbps to 2.5 Gbps line rates per channel
- Integrated CDR and PLL for jitter filtering and clock recovery without external VCO
- 2.5 V core supply with LVPECL and LVTTL compatible I/O interfaces
- Loopback test mode for in-system link diagnostics without external test equipment
- Lock-detect output for link monitoring and host processor alarm management
- 64-pin PowerPAD TQFP with exposed die pad for efficient thermal dissipation
- Internal elastic buffer compensates for reference clock frequency offset between endpoints
What is TLK2521IPAP used for?
TLK2521IPAP is used in Gigabit Ethernet line cards, SONET/SDH OC-48 interfaces, and Fibre Channel storage equipment that require dual independent high-speed serial links at up to 2.5 Gbps per channel. Telecom shelf backplane designs use the integrated CDR to recover clean clocks from incoming serial streams and retransmit them across mid-plane connectors with reduced jitter. Network switch ASICs and FPGA-based mezzanine cards also pair this device with parallel logic buses to serialize and deserialize high-bandwidth data paths for inter-board communication.
What are the specifications of TLK2521IPAP?
| Pbfree Code | Yes |
| YTEOL | 0 |
| JESD-30 Code | S-PQFP-G64 |
| JESD-609 Code | e4 |
| Number of Functions | 1 |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TQFP64,.47SQ |
| Package Shape | SQUARE |
| Package Style | FLATPACK, THIN PROFILE, FINE PITCH |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Supply Voltage-Nom | 2.5V |
| Surface Mount | YES |
| Technology | CMOS |
| Telecom IC Type | TELECOM CIRCUIT |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | NICKEL PALLADIUM GOLD |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.5mm |
| Terminal Position | QUAD |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Package | Quad Flat Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 3 |
| HTS Code | 8542.39.00.01 |
Where can I find the TLK2521IPAP datasheet?
TLK2521IPAP Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for TLK2521IPAP?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
Over what serial line rate range does TLK2521IPAP operate on each channel?
TLK2521IPAP supports serial data rates from 1.0 Gbps to 2.5 Gbps per channel, covering Gigabit Ethernet at 1.25 Gbps, SONET OC-48 at 2.488 Gbps, and Fibre Channel at 1.0625 Gbps and 2.125 Gbps. The integrated multi-rate CDR automatically locks to any rate in this range without manual band-selection programming.
How does the integrated CDR in TLK2521IPAP improve jitter performance on a noisy backplane?
The on-chip clock and data recovery circuit re-times incoming serial data against an internal VCO, filtering accumulated jitter and duty-cycle distortion from FR4 backplane traces. At 2.5 Gbps, the CDR achieves output jitter below 30 ps RMS, meeting SONET OC-48 and Gigabit Ethernet receiver jitter tolerance masks without external jitter-attenuating PLLs.
Which I/O standards does TLK2521IPAP support for connecting to FPGAs and legacy LVPECL logic?
TLK2521IPAP provides LVPECL-compatible differential I/O for the high-speed serial data paths, accepting a 100-ohm differential termination, and LVTTL-compatible single-ended I/O for control and status signals. This dual-standard interface allows direct connection to FPGA SERDES transceivers using on-chip termination as well as to discrete LVPECL clock distribution ICs without level-shifters.
Can TLK2521IPAP run a built-in loopback test, and how does it help during board bring-up?
Yes, TLK2521IPAP includes a serial loopback mode activated by a logic-level control pin that routes transmitted data directly to the receiver CDR input without sending it to the output pins. During board bring-up this allows firmware to verify transmitter and receiver signal integrity at 2.5 Gbps in under 1 ms without a second endpoint device, dramatically reducing debug time on first-article hardware.
What are the supply voltage requirements and power dissipation of TLK2521IPAP in a dual-channel 2.5 Gbps configuration?
TLK2521IPAP operates from a single 2.5 V supply for the core and I/O, drawing approximately 280 mA typical at full 2.5 Gbps dual-channel operation, yielding a total dissipation near 700 mW. The exposed PowerPAD on the 64-pin TQFP package requires a PCB thermal via array to maintain junction temperature below 85°C in a 25°C ambient environment without a heatsink.
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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.
More from Texas Instruments
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 2+ | $100.7463 | $201.49 |
| 3+ | $97.3881 | $292.16 |
| 4+ | $87.3135 | $349.25 |
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