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Analog Devices Inc./Maxim Integrated DS26524GA5
- Part No.:
- DS26524GA5
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Telecom
- Package:
- 256-LBGA, CSBGA
- Datasheet:
-
DS26524GA5.pdf
- Description:
- IC TELECOM INTERFACE 256CSBGA
- Quantity:
- Payment:
- Shipping:
Inventory:1,879
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Product details
Overview
DS26524GA5 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 lines. It delivers 4× T1 (1.544 Mbps), E1 (2.048 Mbps), or J1 framing with integrated crystal-less jitter attenuation meeting ITU-T G.823, G.736, and AT&T Pub 62411, and supports D4, ESF, SLC-96, G.704/CRC-4, and T1-to-E1 conversion in telecom access equipment.
For engineers reviewing the DS26524GA5 datasheet, DS26524GA5 pinout, DS26524GA5 application, or DS26524GA5 equivalent, key selection criteria include per-port framing flexibility, software-selectable 75Ω/100Ω/110Ω/120Ω termination, receive-signal level indication (–2.5dB to –44dB), LIU LOS detection per G.775/ETS 300 233/T1.231, and H.100 (CT Bus) backplane interface compatibility.
Technical Context
The DS26524GA5 integrates four independent framer/LIU channels sharing a common system interface and clock synthesis architecture. Each channel supports full T1/E1/J1 physical layer signaling, framing, alarm generation/insertion, and HDLC data link control - with separate transmit synchronizer, elastic store buffering, and gapped clock mode support for fractional timing alignment.
Its clock structure accepts external master clocks at multiples of 1.544MHz or 2.048MHz, internally adapting them for T1 or E1 usage in host mode. The crystal-less jitter attenuator operates on either transmit or receive path and complies with ETSI CTR 12/13, ITU-T G.742, and G.823 standards for network edge timing integrity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| T1 Data Rate | 1.544 Mbps per channel - enables standard T1 line interface without external rate adaptation logic. |
| E1 Data Rate | 2.048 Mbps per channel - supports E1 infrastructure with G.704 multiframe and CRC-4 error detection. |
| Framing Formats | D4, SLC-96, ESF (T1); G.704/CRC-4 (E1); J1 - allows field-deployable interoperability across North American, European, and Japanese telephony networks. |
| Termination Options | Software-selectable 75Ω coaxial, 100Ω T1, 110Ω J1, 120Ω E1 twisted-pair - eliminates discrete termination resistor networks and simplifies board layout. |
| Rx Signal Level Range | –2.5dB to –44dB (E1), –2.5dB to –36dB (T1) in ~2.5dB steps - enables precise loss monitoring and automatic gain adjustment in variable-length line deployments. |
| Jitter Attenuation | Crystal-less, selectable on Tx or Rx path - meets ITU-T G.823 mask for wander and jitter transfer without external VCXO or PLL components. |
| LOS Detection | Compliant with G.775, ETS 300 233, T1.231 - provides standardized loss-of-signal assertion for network management and failover control. |
Pinout & Package
DS26524GA5 is housed in a 256-ball TE-CSBGA package (56-G6028-001), 15mm × 15mm, 0.8mm ball pitch, RoHS-compliant. Thermal pad exposed on underside for enhanced heat dissipation in high-density telecom line cards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CLKIN | Master Clock Input | Accepts 1.544MHz/2.048MHz or integer multiples; internal divider adapts clock for T1/E1 operation in host mode. |
| BPCLK | Backplane Clock Output | Provides synchronized 1.544/2.048MHz clock to TDM backplane; supports H.100 (CT Bus) timing compliance. |
| RSYNC | Receive Sync Input | Aligns receive-side elastic store to external timing reference in CT Bus configurations. |
| TSSYNCIO | Transmit Sync I/O | Configurable as input or output for transmit-side synchronization in daisy-chained or distributed clock topologies. |
| ALARM[3:0] | Per-Port Alarm Output | Active-low open-drain outputs indicating LOS, AIS, RAI, or other framer-detected alarms per channel. |
| MDIO/MDC | Management Interface | IEEE 802.3-compliant MDIO bus for register access and real-time status monitoring of all four ports. |
Key Features
| Feature | Design Value |
|---|---|
| T1-to-E1 Conversion | Enables protocol-transparent bridging between T1 and E1 networks without external mapping logic or FPGA glue. |
| Per-Port Framing Independence | Each of four channels can be individually configured for T1/D4, T1/ESF, E1/G.704, or J1 - ideal for multi-standard CSU/DSU or mux applications. |
| Transmit Open/Short-Circuit Detection | On-chip diagnostics identify line faults before service activation, reducing field troubleshooting time and improving NMS reliability. |
| HDLC Controller Integration | Dedicated receive/transmit HDLC engines per port handle LAP-B framing, CRC-16, address filtering, and flag detection - offloads host processor. |
| BIT-ERROR-RATE TEST (BERT) | On-chip BERT generator/detector supports PRBS patterns and real-time error counting - eliminates need for external test equipment during production burn-in. |
Applications
| Channel Service Unit (CSU) | Data Service Unit (DSU) |
|---|---|
Use Scenario: Deployed in carrier-class CSUs terminating T1/E1 lines at customer premises, providing line conditioning, loopback, and alarm reporting. IC Role / Device Role / Timing Role: Acts as full-framing LIU with integrated jitter attenuation and LOS detection - serves as primary physical layer interface and timing anchor. Use Value: Eliminates discrete framer + LIU + jitter cleaner combinations; reduces BOM count by ≥3 ICs and improves timing stability per GR-474-CORE. |
Use Scenario: Embedded in enterprise DSUs connecting legacy PBX or routers to telco T1/E1 lines with protocol conversion and data link management. IC Role / Device Role / Timing Role: Provides HDLC framing, signaling extraction/insertion, and T1/E1 format translation - functions as data-link and physical-layer bridge. Use Value: Enables single-chip support for both T1 and E1 modes with software-selectable termination, simplifying global product variants and certification. |
| T1/E1 Test Equipment | Telecom Muxes & Switches |
Use Scenario: Used in portable T1/E1 analyzers for field technicians performing line qualification, BER testing, and alarm injection. IC Role / Device Role / Timing Role: Serves as programmable transceiver with built-in BERT, loopbacks (analog/local/remote), and real-time signal-level monitoring. Use Value: Delivers lab-grade diagnostics in handheld form factor - supports PRBS pattern generation, error counting, and per-port signal margin analysis. |
Use Scenario: Integrated into modular TDM muxes aggregating multiple T1/E1 streams onto higher-speed backplanes (e.g., H.100 CT Bus). IC Role / Device Role / Timing Role: Functions as line-side framer/LIU with elastic store buffering and BPCLK distribution - ensures deterministic TDM slot alignment across ports. Use Value: Enables seamless interoperation with H.100-compliant switch fabrics and eliminates external clock domain crossing logic. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad T1/E1 framer-LIU applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DS2155 | Single-port T1/E1 framer+LIU; no jitter attenuator; requires external clock synthesis; smaller 144-BGA package. | Suitable for cost-sensitive, low-density line cards where quad integration is unnecessary. | Select DS2155 only when scaling to ≤1 port/channel and external jitter cleanup is acceptable. |
| Si5324A-D-GM | Stand-alone jitter attenuator (no framer/LIU); supports wider frequency range (0.001–710 MHz); uses I2C control; different package (40-QFN). | Used in systems requiring ultra-low-jitter clock regeneration upstream of discrete framers. | Choose Si5324A-D-GM only when jitter attenuation must be decoupled from framing functionality and higher-frequency flexibility is required. |
Compared with DS2155 and Si5324A-D-GM, the DS26524GA5 uniquely integrates four complete framer-LIU channels with embedded crystal-less jitter attenuation - delivering full T1/E1/J1 line interface capability in one device, eliminating inter-chip timing skew and reducing PCB area by >40% versus multi-chip solutions.
Availability
DS26524GA5 is available at Aetrix Electronics and suitable for telecom access equipment, CSU/DSU deployment, and T1/E1 test instrumentation requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for DS26524GA5 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) designs precision analog, mixed-signal, and high-reliability communication ICs for telecom, industrial, and automotive markets.
The DS26524GA5 belongs to Maxim's T1/E1/J1 line interface portfolio, engineered specifically for carrier-grade CSUs, DSUs, muxes, and test equipment requiring integrated framing, physical layer interface, and jitter-critical timing performance.
FAQ
What is the operating temperature range for DS26524GA5?
The DS26524GA5 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 outdoor cabinets, central office line cards, and mobile base station backhaul units where thermal margins exceed commercial-grade limits.
Does DS26524GA5 support H.100 (CT Bus) interface compliance?
Yes, the DS26524GA5 supports H.100 (CT Bus) compatibility through its backplane interface, including BPCLK output, RSYNC input, and TSSYNCIO I/O pins. The device implements elastic store buffering and gapped clock mode to meet H.100 timing requirements for TDM slot alignment and frame boundary synchronization across multi-slot backplanes.
How does DS26524GA5 handle T1 and E1 framing simultaneously?
The DS26524GA5 supports independent per-port framing configuration: each of its four channels can be set to T1 (D4/ESF/SLC-96), E1 (G.704/CRC-4), or J1 mode via register programming. This enables true mixed-mode operation - for example, two ports in T1 ESF and two in E1 CRC-4 - without hardware reconfiguration or shared resource contention.
Is DS26524GA5 pin-compatible with earlier DS26524 variants like DS26524G?
Yes, DS26524GA5 shares identical 256-ball TE-CSBGA pinout and footprint with DS26524G, DS26524GN, and DS26524GN+. All variants use the same 56-G6028-001 package, enabling drop-in replacement across temperature grades and RoHS compliance levels without PCB redesign.
What termination impedances does DS26524GA5 support on its line interface?
The DS26524GA5 supports software-selectable termination for 75Ω (E1 coaxial), 100Ω (T1 twisted pair), 110Ω (J1 twisted pair), and 120Ω (E1 twisted pair). This selection is made independently per channel via LIU configuration registers, allowing mixed-impedance line connections on a single device without external resistor networks.
DS26524GA5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 256-LBGA, CSBGA
- Packaging:
- Tray
- Product Status:
- Obsolete
- Function:
- Line Interface Unit (LIU)
- Interface:
- LIU
- Number of Circuits:
- 4
- Voltage - Supply:
- 3.135V ~ 3.465V
- Current - Supply:
- 260mA
- Power (Watts):
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 256-CSBGA (17x17)
DS26524GA5 FAQ
1.How can I place an order for DS26524GA5 through Aetrix?
Please submit a Request for Quotation (RFQ) for DS26524GA5 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 DS26524GA5 reliable?
The price and inventory of DS26524GA5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS26524GA5 is usually 5 days.
3.What payment methods are accepted for DS26524GA5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS26524GA5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS26524GA5?
DS26524GA5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS26524GA5 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 DS26524GA5?
For technical support, including DS26524GA5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS26524GA5 requirements.
6.How does Aetrix verify that DS26524GA5 is sourced from the original manufacturer or authorized distributors?
All DS26524GA5 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 DS26524GA5 meets industry standards.
7.What is the process for return or replacement of DS26524GA5?
All DS26524GA5 units undergo pre-shipment inspection (PSI). If there is an issue with DS26524GA5, 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 DS26524GA5 part is unused and in its original packaging.
Return procedure for DS26524GA5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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