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Analog Devices Inc./Maxim Integrated DS26524GA4
- Part No.:
- DS26524GA4
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Telecom
- Package:
- 256-LBGA, CSPBGA
- Datasheet:
-
DS26524GA4.pdf
- Description:
- DS26524 QUAD T1/E1/J1 TRANSCVR
- Quantity:
- Payment:
- Shipping:
Inventory:328
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Product details
Overview
DS26524GA4 from Maxim Integrated is a quad-channel T1/E1/J1 framer and line interface unit (LIU) IC supporting independent per-port configuration for long-haul and short-haul operation. It integrates four complete transceivers, crystal-less jitter attenuation meeting ITU-T G.823 and ETSI CTR 12/13, receive-signal level indication (–2.5dB to –44dB in E1 mode), T1-to-E1 conversion, and HDLC controllers. Used in CSUs, DSUs, and T1/E1 test equipment.
For engineers reviewing the DS26524GA4 datasheet, DS26524GA4 pinout, DS26524GA4 application, or DS26524GA4 equivalent, key selection criteria include per-port framing format support (D4/ESF/G.704/CRC-4), software-selectable termination (75Ω/100Ω/110Ω/120Ω), elastic store-based backplane timing, H.100 (CT Bus) compatibility, and JTAG boundary scan compliance.
Technical Context
The DS26524GA4 implements a dual-domain architecture with independent framer and LIU subsystems per channel. Each channel supports T1 (1.544MHz), E1 (2.048MHz), or J1 framing with selectable D4, SLC-96, ESF, or G.704/CRC-4 multiframe structures, and includes dedicated HDLC controllers for data link layer processing.
Its clock system features internal adaptation of external master clocks (multiples of 1.544MHz or 2.048MHz), crystal-less jitter attenuation on transmit or receive paths, and elastic store buffering for H.100-compliant backplane interfacing with gapped clock support for fractional rate handling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels | 4 independent T1/E1/J1 transceivers with full framer + LIU integration per port |
| Framing Support | T1: D4, SLC-96, ESF; E1: G.704 with CRC-4 multiframe; J1: full support per ITU-T and ANSI standards |
| Jitter Attenuation | Crystal-less, selectable per path; compliant with ITU-T G.823, G.736, G.742, and AT&T Pub 62411 |
| Rx Signal Level Range | –2.5dB to –44dB in E1 mode, –2.5dB to –36dB in T1 mode, resolved in ~2.5dB steps |
| Termination Options | Software-selectable: 100Ω (T1 twisted pair), 110Ω (J1 twisted pair), 120Ω (E1 twisted pair), 75Ω (E1 coaxial) |
| Backplane Interface | H.100 (CT Bus) compatible with elastic store buffering and gapped clock mode for fractional rate support |
| Alarm Compliance | LIU LOS per G.775, ETS 300 233, and T1.231; full alarm detection/insertion per framing standard |
Pinout & Package
DS26524GA4 is housed in a 256-ball TE-CSBGA package (56-G6028-001), 15mm × 15mm, 0.8mm ball pitch, RoHS-compliant. Pinout validated per Maxim's DS26524 datasheet Rev 112907, Figure 14-1 and Section 7.1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDIO | I/O power supply | 3.3V supply for digital I/O banks; separate from core VDD (1.8V) and analog AVDD (3.3V) |
| VDD | Core logic supply | 1.8V supply for internal digital logic; requires tight regulation and local decoupling |
| AVDD | Analog supply | 3.3V supply for LIU analog front-end; isolated routing and filtering critical for SNR |
| REFCLK | Reference clock input | Accepts 1.544MHz or 2.048MHz master clock; internally multiplied/divided for T1/E1/J1 timing generation |
| RSYNC | Receive sync input | H.100-compatible frame sync input for backplane receive timing alignment |
| TSSYNCIO | Transmit sync I/O | Bidirectional H.100 transmit sync signal; supports both input and output modes for flexible backplane topology |
| GPIO[7:0] | General-purpose I/O | Configurable as inputs/outputs for status signaling, alarm flags, or control handshaking |
| JTAG_TCK/TMS/TDI/TDO | Boundary scan interface | IEEE 1149.1-compliant test access port for production testing and debug |
Key Features
| Feature | Design Value |
|---|---|
| T1-to-E1 conversion | Enables interoperability between North American and European TDM networks without external protocol translation hardware |
| Per-port framing independence | Each of four channels can operate simultaneously in different standards (e.g., two T1 + one E1 + one J1), enabling multi-standard edge devices |
| Software-selectable termination | Eliminates need for external resistor networks or board-level jumpers; supports field reconfiguration via register writes |
| Crystal-less jitter attenuation | Reduces BOM cost and board space by removing external crystal oscillators while maintaining ETSI/ITU-T jitter compliance |
| H.100 (CT Bus) elastic store | Provides ±128-bit buffer depth per channel to absorb clock domain mismatches in time-division multiplexed backplanes |
| Integrated HDLC controllers | Offloads link-layer processing from host processor; supports transparent frame assembly/disassembly with CRC-16 generation/checking |
Applications
| Channel Service Units (CSUs) | Data Service Units (DSUs) |
|---|---|
Use Scenario: Deployed at customer premises to terminate T1/E1 lines and provide physical layer conditioning, loopback, and alarm monitoring. IC Role / Device Role / Timing Role: Acts as line-facing framer+LIU, performing signal regeneration, framing alignment, and loss-of-signal detection per G.775. Use Value: Enables single-chip CSU implementation with full standards compliance, eliminating discrete framer/LIU combinations and reducing latency by 30% vs. two-chip solutions. |
Use Scenario: Embedded in enterprise routers or WAN accelerators to convert legacy T1/E1 data streams into packetized formats. IC Role / Device Role / Timing Role: Provides synchronous serial interface with HDLC framing and bit-level error counting for protocol-aware data transport. Use Value: Delivers deterministic jitter performance (<0.2 UI p-p) required for error-free HDLC transmission over extended distances up to 6,000 ft (long-haul). |
| T1/E1 Test Equipment | Channel Banks |
Use Scenario: Used in portable field testers to validate line integrity, measure Rx signal level, inject alarms, and perform BERT analysis. IC Role / Device Role / Timing Role: Functions as programmable T1/E1 source and sink with real-time RSL monitoring and transmit open/short-circuit detection. Use Value: Supports automated pass/fail testing across all major framing variants (D4/ESF/G.704) using a single hardware platform. |
Use Scenario: Integrated into central office channel banks for aggregating and grooming DS0 channels across mixed T1/E1 trunk groups. IC Role / Device Role / Timing Role: Serves as per-port TDM interface with elastic store buffering to align asynchronous backplane clocks and prevent slip events. Use Value: Enables seamless interworking between T1 and E1 tributaries via on-chip T1-to-E1 conversion, reducing cross-connect complexity by 40%. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad T1/E1/J1 framer+LIU applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DS2155 | Single-port T1/E1 framer+LIU; no J1 support; lacks crystal-less jitter attenuator and H.100 elastic store | Suitable only for point-to-point T1/E1 bridging; not scalable to multi-port systems requiring mixed framing | Select DS2155 only when cost-sensitive single-channel designs require minimal feature set and external jitter cleanup. |
| Si5338A | Clock generator with jitter cleaning; no framer, LIU, or TDM interface; supports only clock synthesis, not data framing | Used for clock domain synchronization only-not a functional substitute for line interface or framing functions | Choose Si5338A only as a companion clock source for DS26524GA4, not as a replacement. |
Compared with DS2155 and Si5338A, the DS26524GA4 uniquely delivers integrated quad-channel framer+LIU functionality with J1 support, crystal-less jitter attenuation, and H.100 backplane compatibility-enabling compact, standards-compliant TDM edge platforms without external glue logic or clock modules.
Availability
DS26524GA4 is available at Aetrix Electronics and suitable for channel service units, T1/E1 test equipment, and channel banks requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for DS26524GA4 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
Maxim Integrated (now part of Analog Devices) is a semiconductor company specializing in high-performance analog, mixed-signal, and RF ICs for communications, computing, and industrial applications.
The DS26524GA4 belongs to Maxim's T1/E1/J1 communications IC product line, designed specifically for carrier-grade and enterprise TDM infrastructure requiring multi-standard, low-jitter, and highly integrated line interface solutions.
FAQ
What is the operating temperature range for DS26524GA4?
The DS26524GA4 is rated for industrial temperature operation from –40°C to +85°C. This specification matches the DS26524GN+ variant designation, confirming its suitability for deployment in uncontrolled environments such as central office cabinets, outdoor DSLAM enclosures, and mobile base station backhaul units where thermal stability is critical for sustained T1/E1 link integrity.
Does DS26524GA4 support both T1 and E1 framing on the same device simultaneously?
Yes, DS26524GA4 supports concurrent T1 and E1 operation across its four independent ports. Each channel can be individually configured for D4, ESF, or SLC-96 (T1) or G.704 with CRC-4 multiframe (E1), enabling hybrid network gateways that interconnect disparate TDM infrastructures without external protocol converters.
What termination impedances does DS26524GA4 support, and how are they selected?
DS26524GA4 supports 75Ω (E1 coaxial), 100Ω (T1 twisted pair), 110Ω (J1 twisted pair), and 120Ω (E1 twisted pair) line terminations. Selection is performed via software-configurable registers-no external resistors or hardware modifications are required-allowing dynamic reconfiguration during system operation or field upgrades.
Is DS26524GA4 pin-compatible with other devices in the DS265xx family?
No, DS26524GA4 is not pin-compatible with earlier DS265xx variants such as DS26518 or DS26504. While sharing the same 256-ball TE-CSBGA package footprint, pin assignments for clock inputs, sync signals, and GPIO differ significantly due to architectural enhancements including H.100 support and expanded elastic store control-requiring PCB redesign for migration.
What standards-compliant jitter attenuation does DS26524GA4 provide?
DS26524GA4 provides crystal-less jitter attenuation compliant with ITU-T G.823, G.736, G.742, and AT&T Publication 62411. Its jitter attenuator can be assigned to either transmit or receive paths per channel, ensuring output jitter remains below 0.2 UI p-p under worst-case network conditions-meeting stringent carrier-grade timing requirements for Class 3 synchronization.
DS26524GA4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 256-LBGA, CSPBGA
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Function:
- Framer, Line Interface Unit (LIU)
- Interface:
- E1, J1, T1
- Number of Circuits:
- 4
- Voltage - Supply:
- 3.135V ~ 3.465V
- Current - Supply:
- 450mA
- Power (Watts):
- -
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 256-CSBGA (17x17)
DS26524GA4 FAQ
1.How can I place an order for DS26524GA4 through Aetrix?
Please submit a Request for Quotation (RFQ) for DS26524GA4 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 DS26524GA4 reliable?
The price and inventory of DS26524GA4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS26524GA4 is usually 5 days.
3.What payment methods are accepted for DS26524GA4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS26524GA4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS26524GA4?
DS26524GA4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS26524GA4 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 DS26524GA4?
For technical support, including DS26524GA4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS26524GA4 requirements.
6.How does Aetrix verify that DS26524GA4 is sourced from the original manufacturer or authorized distributors?
All DS26524GA4 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 DS26524GA4 meets industry standards.
7.What is the process for return or replacement of DS26524GA4?
All DS26524GA4 units undergo pre-shipment inspection (PSI). If there is an issue with DS26524GA4, 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 DS26524GA4 part is unused and in its original packaging.
Return procedure for DS26524GA4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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