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Analog Devices Inc./Maxim Integrated DS26524GN+
- Part No.:
- DS26524GN+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Telecom
- Package:
- 256-LBGA, CSBGA
- Datasheet:
-
DS26524GN+.pdf
- Description:
- IC TELECOM INTERFACE 256CSBGA
- Quantity:
- Payment:
- Shipping:
Inventory:2,645
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Product details
Overview
DS26524GN+ 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 operation, crystal-less jitter attenuation compliant with ITU-T G.823 and ETSI ETR 12/13, and integrated transmit synchronizer and alarm detection - deployed in CSUs, DSUs, and T1/E1 test equipment.
For engineers reviewing the DS26524GN+ datasheet, DS26524GN+ pinout, DS26524GN+ application, or DS26524GN+ equivalent, key selection criteria include per-port framing format support (D4/ESF/G.704/CRC-4), software-selectable 75Ω/100Ω/110Ω/120Ω termination, receive signal level indication range (–2.5 dB to –44 dB in E1 mode), and H.100 (CT Bus) backplane interface compatibility.
Technical Context
The DS26524GN+ integrates four independent framer/LIU channels with dual-path crystal-less jitter attenuators meeting ITU-T G.736, G.742, and G.823 standards. Each channel supports T1, E1, or J1 line rates and framing formats (D4, SLC-96, ESF, G.704, CRC-4), with programmable transmit/receive termination and per-port loopback modes including analog, local, remote, and dual loopback.
It features a flexible system interface supporting Intel- and Motorola-style microprocessor buses, H.100 CT Bus compatibility via IBO multiplexer, elastic store buffering for clock domain bridging, and JTAG boundary-scan test access. The device operates from a single 3.3V supply and supports –40°C to +85°C industrial temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels | 4 independent T1/E1/J1 transceivers with full framer + LIU functionality per port |
| Data Rate | 1.544 Mbps (T1/J1) or 2.048 Mbps (E1); supports gapped clock mode for fractional timing |
| Jitter Attenuation | Crystal-less, meets ITU-T G.823, ETSI ETR 12/13, and AT&T Pub 62411 requirements |
| Termination | Software-selectable: 100Ω (T1), 110Ω (J1), 120Ω (E1 twisted pair), 75Ω (E1 coaxial) |
| Rx Level Indication | –2.5 dB to –44 dB in E1 mode, –2.5 dB to –36 dB in T1 mode, in ~2.5 dB steps |
| Framing Support | T1: D4, SLC-96, ESF; E1: G.704 multiframe with CRC-4; J1: full support with T1-to-E1 conversion |
| Supply Voltage | 3.3V ±5%; internal LDOs generate required core and I/O rails |
Pinout & Package
DS26524GN+ is housed in a 256-ball TE-CSBGA (56-G6028-001) package, 15 mm × 15 mm, 0.8 mm pitch, RoHS-compliant and lead-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CLKIN | Master Clock Input | Accepts 1.544 MHz or 2.048 MHz external clock; internally adapted for T1/E1 usage in host mode |
| RSYNC | Receive Sync Input | H.100 (CT Bus) frame sync input; enables backplane timing alignment across multiple devices |
| TSSYNCIO | Transmit Sync I/O | Bidirectional sync signal for transmit-side timing coordination in CT Bus systems |
| INT | Interrupt Output | Open-drain active-low interrupt signaling device-level or per-port events (alarms, LOS, BERT completion) |
| RESET | Hardware Reset Input | Active-low asynchronous reset; initiates full device initialization sequence |
| JTAG_TCK/TMS/TDI/TDO | Boundary Scan Interface | IEEE 1149.1-compliant test access port for programming, diagnostics, and production testing |
Key Features
| Feature | Design Value |
|---|---|
| T1-to-E1 Conversion | Enables protocol translation between T1 and E1 networks without external logic or FPGA intervention |
| Per-Port Loopback Modes | Supports analog, local, remote, and dual loopback per channel for isolation and field diagnostics |
| HDLC Controllers | Dedicated receive/transmit HDLC controllers per port for embedded data link layer processing |
| Alarm Detection & Insertion | Real-time detection of AIS, RAI, LOF, LOS, and FER alarms; programmable insertion for network testing |
| Bit-Error-Rate Test (BERT) | On-chip BERT engine with repetitive pattern generation and error counting for line integrity validation |
Applications
| Channel Service Unit (CSU) | Data Service Unit (DSU) |
|---|---|
Use Scenario: Deployment at customer premises to terminate T1/E1 lines and provide signal conditioning, timing recovery, and alarm monitoring. IC Role / Device Role / Timing Role: DS26524GN+ serves as the complete framer/LIU, handling line interface, framing, and backplane TDM interfacing. Use Value: Eliminates need for discrete framer and LIU ICs; reduces BOM count and PCB area while enabling per-port reconfiguration. | Use Scenario: Integration into wide-area network edge devices that convert legacy T1/E1 signals to packet-based protocols (e.g., PPP, Frame Relay). IC Role / Device Role / Timing Role: DS26524GN+ provides physical-layer framing, clock synchronization, and HDLC data-link processing before packet encapsulation. Use Value: On-chip HDLC controllers and elastic stores simplify interface to microprocessors or ASICs, reducing firmware overhead. |
| T1/E1 Test Equipment | Telecom Switch Backplane Interface |
Use Scenario: Portable or rack-mounted testers verifying line integrity, jitter performance, framing accuracy, and alarm response in field or lab environments. IC Role / Device Role / Timing Role: DS26524GN+ acts as a programmable T1/E1 source/sink with BERT, loopbacks, and precise signal level control. Use Value: Crystal-less jitter attenuator meets ETSI/ITU compliance for test-grade timing; software-selectable termination avoids hardware changes. | Use Scenario: Interfacing line cards to central switch fabric using H.100 (CT Bus) or custom TDM backplanes. IC Role / Device Role / Timing Role: DS26524GN+ functions as a TDM concentrator with IBO multiplexer and elastic store buffering for clock domain crossing. Use Value: Supports 4.096 MHz, 8.192 MHz, and 16.384 MHz backplane clocks; eliminates external FIFOs or clock-domain adapters. |
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 |
|---|---|---|---|
| DS26528GN+ | 8-channel version; identical architecture, pinout, and feature set per channel; larger 324-ball TE-CSBGA package | Designed for higher-density line cards requiring >4 ports; shares same register map and firmware compatibility | Select DS26528GN+ when scaling to 8-line interfaces without redesigning driver stack or layout. |
| MAX3675A | Single-channel T1/E1 LIU only - no framer, no HDLC, no BERT, no jitter attenuator; requires external framer | Targeted at cost-sensitive, low-channel-count applications where framer functionality resides elsewhere | Choose MAX3675A only if framer and control logic are implemented externally; not a functional substitute for DS26524GN+. |
Compared with DS26528GN+, DS26524GN+ offers lower channel density but smaller footprint and power; compared with MAX3675A, DS26524GN+ delivers full integration - eliminating external framer, clock cleanup, and diagnostic logic - making it optimal for compact, self-contained CSU/DSU designs.
Availability
DS26524GN+ is available at Aetrix Electronics and suitable for channel service units (CSUs), data service units (DSUs), and T1/E1 test equipment requiring stable component supply, industrial temperature operation (–40°C to +85°C), and RoHS-compliant packaging.
Supply support for DS26524GN+ 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 U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and RF ICs for communications, industrial, and computing markets.
The DS26524GN+ belongs to Maxim's telecom line interface portfolio, designed specifically for carrier-grade T1/E1/J1 infrastructure equipment requiring integrated framer, LIU, jitter attenuation, and backplane interface capabilities.
FAQ
What is the operating temperature range for DS26524GN+?
The DS26524GN+ is rated for industrial operation from –40°C to +85°C. This specification is confirmed in the Ordering Information table and thermal characteristics section of the official datasheet. The 'N' suffix explicitly denotes the extended temperature grade, and the '+' indicates RoHS-compliant packaging. DS26524GN+ maintains full electrical performance across this range without derating.
Does DS26524GN+ support both T1 and E1 framing simultaneously across its four ports?
Yes, DS26524GN+ supports independent framing selection per port: each of the four channels can be configured individually for T1 (D4, SLC-96, ESF), E1 (G.704 with CRC-4), or J1 operation. This is enabled by dedicated per-port mode registers and verified in Section 1.1 (Major Operating Modes) and Section 8.9 (Framers) of the datasheet. DS26524GN+ does not require global mode locking.
Is an external crystal required for DS26524GN+ jitter attenuation?
No, DS26524GN+ incorporates a crystal-less jitter attenuator for both transmit and receive paths. As stated in the Features list and Section 2.4, it meets ETSI ETR 12/13, ITU-T G.736, G.742, G.823, and AT&T Pub 62411 without requiring an external crystal oscillator. DS26524GN+ uses internal PLL-based synthesis for jitter cleanup.
What backplane interface standards does DS26524GN+ support?
DS26524GN+ supports H.100 (CT Bus) compatibility through its IBO multiplexer and RSYNC/TSSYNCIO signaling, as documented in Sections 8.8.3 and 10.3. It also supports generic TDM backplane interfacing with elastic store buffering for clock domain crossing. DS26524GN+ does not support PCI, PCIe, or Ethernet backplanes - its interface is strictly time-division multiplexed (TDM) and synchronous.
How is termination impedance selected on DS26524GN+?
Termination impedance on DS26524GN+ is software-selectable per port via internal register configuration. Supported values are 100Ω (T1), 110Ω (J1), 120Ω (E1 twisted pair), and 75Ω (E1 coaxial), as specified in the Features section and Section 2.2 (Line Interface). Selection is performed through LIU control registers - no external resistors or hardware jumpers are needed. DS26524GN+ implements all termination networks internally.
DS26524GN+ 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:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 256-CSBGA (17x17)
DS26524GN+ FAQ
1.How can I place an order for DS26524GN+ through Aetrix?
Please submit a Request for Quotation (RFQ) for DS26524GN+ 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 DS26524GN+ reliable?
The price and inventory of DS26524GN+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS26524GN+ is usually 5 days.
3.What payment methods are accepted for DS26524GN+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS26524GN+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS26524GN+?
DS26524GN+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS26524GN+ 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 DS26524GN+?
For technical support, including DS26524GN+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS26524GN+ requirements.
6.How does Aetrix verify that DS26524GN+ is sourced from the original manufacturer or authorized distributors?
All DS26524GN+ 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 DS26524GN+ meets industry standards.
7.What is the process for return or replacement of DS26524GN+?
All DS26524GN+ units undergo pre-shipment inspection (PSI). If there is an issue with DS26524GN+, 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 DS26524GN+ part is unused and in its original packaging.
Return procedure for DS26524GN+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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