My Inquiry
My Account
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:1,979
Please send an inquiry. Send us your inquiry, and we will respond immediately.
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 operation across telecom infrastructure. It delivers four fully integrated 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), and T1-to-E1 format conversion - deployed in channel banks and CSUs.
For engineers reviewing the DS26524GN datasheet, DS26524GN pinout, DS26524GN application, or DS26524GN equivalent, key selection criteria include its –40°C to +85°C industrial temperature rating, 256-ball TE-CSBGA package, per-port framing flexibility (D4/ESF/G.704/CRC-4), software-selectable 75Ω/100Ω/110Ω/120Ω termination, 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 compliant with ITU-T G.736, G.742, and AT&T Pub 62411. Each channel supports selectable T1 (1.544MHz), E1 (2.048MHz), or J1 framing and includes dedicated HDLC controllers, elastic store buffers, and alarm generation circuitry per G.775 and ETS 300 233.
Its clock architecture accepts external master clocks at multiples of 1.544MHz or 2.048MHz and adapts them internally for host-mode T1/E1 operation. The system interface supports Intel- and Motorola-style microprocessor buses plus JTAG boundary scan (IEEE 1149.1), while the backplane interface implements H.100 CT Bus timing with IBO multiplexer support.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Temp | –40°C to +85°C - enables deployment in uncontrolled industrial telecom cabinets and outdoor access nodes. |
| Interface Type | H.100 (CT Bus) backplane + microprocessor bus (Intel/Motorola modes) - provides direct integration into legacy TDM switching fabrics and host controller systems. |
| Jitter Attenuation | Crystal-less, meets ITU-T G.823, G.736, G.742 - eliminates need for external VCXO, reduces BOM count and board space in timing-critical line cards. |
| Rx Signal Level Range | –2.5dB to –44dB in E1 mode (2.5dB steps) - enables precise loss monitoring and automatic gain adjustment without external ADCs. |
| Framing Support | T1: D4, SLC-96, ESF; E1: G.704, CRC-4 multiframe; J1: full support - allows single-part deployment across North America, Europe, and Japan carrier networks. |
| Termination Options | Software-selectable 75Ω coaxial, 100Ω/110Ω/120Ω twisted-pair - eliminates manual resistor changes during field reconfiguration or multi-region product variants. |
| Alarm Compliance | LIU LOS per G.775, ETS 300 233, T1.231 - ensures interoperability with carrier-grade network management and fault isolation systems. |
Pinout & Package
DS26524GN uses a 256-ball TE-CSBGA (56-G6028-001) package with 1.0mm ball pitch, designed for high-density telecom line card layouts and thermal dissipation in convection-cooled chassis.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDIO | I/O Power Supply | 3.3V supply for microprocessor and backplane interface logic; decoupling required per Maxim layout guidelines. |
| VDDA | Analog Core Supply | 3.3V analog supply for LIU transceiver circuits; isolated routing prevents digital noise coupling into line signals. |
| RSYNC | Receive Sync Input | H.100-compatible frame sync input for backplane receive path; supports 1.544/2.048MHz rates with elastic store alignment. |
| TSSYNCIO | Transmit Sync I/O | Bidirectional sync signal for transmit-side timing control in CT Bus mode; configurable as input or output via register. |
| RESET_N | Active-Low Reset | Synchronous reset assertion clears all internal registers and places LIUs in high-impedance state until initialization completes. |
| JTAG_TCK | JTAG Clock | IEEE 1149.1 test clock input; enables boundary scan testing and in-system programming without dedicated debug headers. |
Key Features
| Feature | Design Value |
|---|---|
| T1-to-E1 Format Conversion | Hardware-accelerated real-time conversion between T1 and E1 framing structures, enabling interworking gateways without FPGA logic. |
| Per-Port Framing Independence | Each of four channels individually configured for D4, ESF, G.704, or CRC-4 - supports mixed-service line cards (e.g., T1 voice + E1 data on same chip). |
| Transmit Open/Short Detection | On-chip diagnostics identify physical layer faults (open circuit, short to ground/VDD) before service activation - reduces truck rolls for field technicians. |
| Flexible Signaling Extraction/Insertion | Supports CAS, CCS, and robbed-bit signaling via system interface or microprocessor port - simplifies integration with legacy PBX and SS7 signaling stacks. |
| Integrated BERT Function | On-die bit-error-rate test engine with repetitive pattern generation and error counting - enables production-line loopback validation without external test equipment. |
Applications
| Channel Service Units (CSUs) | Data Service Units (DSUs) |
|---|---|
Use Scenario: Deployed in central office edge devices aggregating multiple T1/E1 lines into packet-switched backbones. IC Role / Device Role / Timing Role: Framer/LIU performs line synchronization, framing alignment, and jitter cleanup before handing off to ATM or IP encapsulation engines. Use Value: Eliminates discrete jitter cleaners and framers, reducing latency by up to 1.2μs and power consumption by 35% versus multi-chip solutions. |
Use Scenario: Embedded in enterprise WAN routers connecting branch offices over leased T1/E1 circuits. IC Role / Device Role / Timing Role: Acts as physical-layer interface handling line coding (AMI/HDB3), framing, and alarm reporting to router OS. Use Value: Software-selectable termination and framing allows single hardware SKU to serve global customers without PCB redesign. |
| T1/E1 Test Equipment | Channel Banks |
Use Scenario: Portable field testers verifying line integrity, signal level, and framing compliance during installation or troubleshooting. IC Role / Device Role / Timing Role: Provides calibrated Rx level detection (–44dB sensitivity), BERT, and remote loopback control via JTAG or microprocessor interface. Use Value: On-chip BERT and open/short detection replace external signal analyzers, cutting tester BOM cost by $120+ per unit. |
Use Scenario: High-density line cards in Class 5 switches supporting 256+ simultaneous DS0 channels. IC Role / Device Role / Timing Role: Quad-channel framer/LIU handles TDM time-slot mapping, CAS signaling extraction, and H.100 backplane interfacing. Use Value: Elastic store buffers absorb clock domain mismatches between line and backplane domains, preventing slip events in >99.999% uptime systems. |
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 oscillator; 144-pin LQFP package. | Targeted at low-channel-count add-on modules rather than high-density line cards. | Select DS2155 only when scaling to ≤2 ports and external timing sources are acceptable. |
| Si5338A | Programmable clock generator (not framer/LIU); no line interface, framing, or alarm logic; supports jitter cleaning but not T1/E1 protocol processing. | Used as companion clock source for framer ICs like DS26524GN - not a functional substitute. | Consider Si5338A only as a timing reference upgrade alongside DS26524GN, not as a replacement. |
Compared with DS2155 and Si5338A, the DS26524GN uniquely integrates four complete framer/LIU channels with crystal-less jitter attenuation, eliminating both discrete timing components and multi-chip interconnect complexity - making it the sole option for compact, carrier-grade quad T1/E1 line interface designs.
Availability
DS26524GN is available at Aetrix Electronics and suitable for channel banks, CSUs, DSUs, and T1/E1 test equipment requiring stable component supply across extended temperature ranges and long product lifecycles.
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 semiconductor company specializing in high-performance analog, mixed-signal, and RF solutions for industrial, communications, and computing markets.
The DS26524GN belongs to Maxim's telecom line interface portfolio, engineered specifically for carrier-class TDM infrastructure where protocol flexibility, jitter performance, and thermal reliability are non-negotiable.
FAQ
What is the operating temperature range of the DS26524GN?
The DS26524GN is rated for industrial operation from –40°C to +85°C. This extended range ensures reliable performance in telecom cabinets exposed to ambient temperature swings, outdoor enclosures, and high-power-density line cards where airflow may be limited. The DS26524GN maintains full electrical specifications across this range without derating.
Does the DS26524GN support both T1 and E1 framing simultaneously?
Yes, the DS26524GN supports independent framing per channel: one port can run T1 ESF while another runs E1 G.704/CRC-4. This per-port configurability is enabled by dedicated framer resources and separate control registers, allowing mixed-service line cards without external multiplexing logic. The DS26524GN does not require global mode locking.
How does the crystal-less jitter attenuator in the DS26524GN meet ITU-T standards?
The DS26524GN's integrated jitter attenuator meets ITU-T G.823, G.736, and G.742 requirements without an external crystal. It uses a digitally controlled loop with adaptive bandwidth tuning to suppress input jitter while maintaining phase stability - validated across –40°C to +85°C and confirmed in Maxim's compliance test reports for the DS26524GN device family.
What termination impedances does the DS26524GN support on its LIU ports?
The DS26524GN supports software-selectable termination: 100Ω for T1 twisted pair, 110Ω for J1 twisted pair, 120Ω for E1 twisted pair, and 75Ω for E1 coaxial. Selection is made per channel via register writes, enabling field reconfiguration without hardware changes. The DS26524GN applies termination only during active line connection, minimizing power draw in idle states.
Is the DS26524GN pin-compatible with other devices in the DS265xx family?
No, the DS26524GN is not pin-compatible with earlier DS265xx variants such as DS26518 or DS26504. While all share the 256-ball TE-CSBGA package, pin functions differ significantly across the family due to expanded feature sets (e.g., added H.100 signals, enhanced JTAG, new power domains). Board design must be specific to the DS26524GN footprint and signal mapping.
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.
DS26524GN Tags
-
LMC567CMX/NOPB
Texas Instruments
-
LM567CMX/NOPB
Texas Instruments
-
LM567CM/NOPB
Texas Instruments
-
VSC8531XMW-02
Microchip Technology
-
VSC8531XMW-05
Microchip Technology
-
GPY115C0VI
MaxLinear, Inc.
-
SI32185-A-FMR
Skyworks Solutions Inc.
-
VSC8541XMV-05
Microchip Technology
-
SI32178-B-FM1R
Skyworks Solutions Inc.
-
GPY215C0VI
MaxLinear, Inc.
-
CPC7514ZTR
Littelfuse Inc.
-
VSC8502XML-03
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
