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Analog Devices Inc./Maxim Integrated DS26334GN
- Part No.:
- DS26334GN
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Telecom
- Package:
- 256-LBGA, CSBGA
- Datasheet:
-
DS26334GN.pdf
- Description:
- IC TELECOM INTERFACE 256CSBGA
- Quantity:
- Payment:
- Shipping:
Inventory:1,972
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Product details
Overview
DS26334GN from Maxim Integrated is a 16-channel E1/T1/J1 short- and long-haul line interface unit (LIU) operating from a single 3.3V supply, supporting independent per-channel E1/T1/J1 selection, fully internal impedance matching (no external resistors), and crystal-less jitter attenuation. It targets telecom infrastructure requiring high-density, temperature-hardened line interfacing - such as wireless base stations and E1/T1 multiplexers.
For engineers reviewing the DS26334GN datasheet, DS26334GN pinout, DS26334GN application, or DS26334GN equivalent, key selection considerations include its -40°C to +85°C industrial temperature rating, 256-ball TE-CSBGA package, dual-rail/single-rail mode configurability, AMI/HDB3/B8ZS encoding support, and G.772 nonintrusive monitoring capability.
Technical Context
The DS26334GN integrates 16 independent LIUs with programmable transmit/receive-side impedance matching, on-chip PLL-based clock synthesis from a single master clock (e.g., 2.048MHz or 1.544MHz), and dual clock outputs. Each channel supports selectable short/long-haul templates compliant with ANSI T1.231, ITU-T G.775, and ETS 300 233.
It implements digital/analog loss-of-signal detection, AIS generation/detection, bipolar violation and excessive-zero monitoring, and two independent built-in BERT engines. Interface options include 8-bit parallel (Intel/Motorola modes) or 4-wire serial control, with JTAG boundary scan per IEEE 1149.1 for test and debug.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels | 16 independent E1/T1/J1 LIUs - enables full T1/E1 aggregation in single-package line cards without external channel splitting. |
| Supply Voltage | Single 3.3V ±5% - simplifies power design; I/O pins are 5V tolerant, easing integration with legacy 5V logic. |
| Operating Temp | -40°C to +85°C - qualified for industrial and outdoor telecom environments including wireless base stations and remote DSLAMs. |
| Package | 256-ball TE-CSBGA (15mm × 15mm, 0.8mm pitch) - smallest available package for 16-channel LIU, optimizing board space in dense line cards. |
| Line Encoding | AMI, HDB3 (E1), B8ZS (T1/J1) - ensures standards-compliant signal integrity across global telecom networks. |
| Receiver Sensitivity | -38dB (T1 mode), -43dB (E1 mode) - supports long-haul operation over 12–30dB cable attenuation plus 14–30dB resistive loss. |
| Jitter Attenuation | Crystal-less architecture - eliminates external crystal oscillator, reducing BOM count and board area while meeting G.772 jitter requirements. |
Pinout & Package
DS26334GN is housed in a 256-ball TE-CSBGA (15mm × 15mm, 0.8mm pitch) with exposed thermal pad. Pin functions are defined per channel pair (TTIP/TRING, RTIP/RRING) and shared control resources.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TTIP[n], TRING[n] | Transmit differential output (n = 1–16) | Drives balanced T1/E1 line; supports short/long-haul templates and dual-rail mode for enhanced voltage swing. |
| RTIP[n], RRING[n] | Receive differential input (n = 1–16) | Accepts line signals with configurable gain; enables monitor mode for up to 44dB total attenuation handling. |
| RCLK, TCLK | Receive/transmit clock outputs | Provides recovered or synthesized clocks for host timing sync or daisy-chained downstream devices. |
| TNEG, TPOS, RNEG, RPOS | Test access points | Enable analog loopback and signal integrity validation at each LIU's front-end without external hardware. |
| JTAG_TCK/TMS/TDI/TDO | IEEE 1149.1 boundary scan interface | Supports production testing, in-system diagnostics, and firmware update verification without dedicated debug headers. |
Key Features
| Feature | Design Value |
|---|---|
| Software-selectable impedance match | Per-channel TX/RX termination configuration eliminates need for external resistors and reduces layout complexity. |
| G.772 nonintrusive monitoring | Enables real-time line health assessment without disrupting live traffic - critical for carrier-grade SLA compliance. |
| Dual built-in BERT engines | Allows concurrent bit error rate testing on any two channels during deployment or maintenance, accelerating field diagnostics. |
| Transmit short-circuit protection | Hardware-level fault response prevents damage during line faults or miswiring - improves system reliability in unattended sites. |
| Loss-of-signal detection per T1.231/G.775 | Meets strict telecom standard thresholds (-2.5dB to -38dB in T1, -3dB to -43dB in E1) for accurate alarm triggering. |
Applications
| Wireless Base Stations | E1/T1 Multiplexer |
|---|---|
Use Scenario: Backhaul interface between BTS and BSC in macro/micro cell deployments with mixed E1/T1 connectivity. IC Role / Device Role / Timing Role: Line interface unit providing physical layer framing, clock recovery, and AIS handling for synchronous transport. Use Value: Single-chip 16-channel support reduces component count and PCB area versus discrete LIU solutions, while -40°C to +85°C rating ensures outdoor cabinet operation. | Use Scenario: Aggregation of multiple E1/T1 feeds into higher-order PDH/SDH streams in central office equipment. IC Role / Device Role / Timing Role: Physical layer transceiver enabling per-channel protocol selection (E1 vs T1), encoding (HDB3/B8ZS), and jitter cleanup. Use Value: On-chip synthesizer eliminates need for multiple crystal oscillators; internal impedance match removes 32 external termination resistors per device. |
| ISDN Primary Rate Interface | ATM/Frame Relay Equipment |
Use Scenario: PRI termination in enterprise PBX gateways or service provider edge routers supporting 30B+D (E1) or 23B+D (T1) interfaces. IC Role / Device Role / Timing Role: Full-duplex LIU managing line coding, AIS, BPV detection, and loss-of-signal reporting per channel. Use Value: Independent channel configuration allows mixed E1/T1 ports on same card; JTAG support simplifies firmware updates in deployed systems. | Use Scenario: Physical layer interface in ATM switches or Frame Relay access devices connecting to telco T1/E1 lines. IC Role / Device Role / Timing Role: Synchronous data link controller with integrated clock recovery, BERT, and loopback modes for service activation and troubleshooting. Use Value: Analog/digital/remote loopback modes enable end-to-end path validation without external test gear - reducing OPEX for field technicians. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar line interface unit applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DS26528G+ | 32-channel E1/T1 LIU in 324-ball CSBGA; higher channel density but larger footprint and +70°C max temp. | Targeted at high-port-count central office cards where space permits larger package and ambient temp stays ≤70°C. | Select DS26528G+ only when doubling channel count per slot is required and industrial temperature range is not needed. |
| MAX3008CJ | 8-channel T1/E1 LIU in 128-pin LQFP; no jitter attenuator, requires external crystal, and lacks G.772 monitoring. | Suitable for cost-sensitive, lower-density applications like branch office routers where advanced diagnostics are optional. | Choose MAX3008CJ for simpler designs with <8 channels and relaxed telecom feature requirements. |
Compared with DS26334GN, DS26528G+ offers double channel count but sacrifices industrial temperature rating and increases board area, while MAX3008CJ reduces integration level and diagnostic capability to meet lower-cost, lower-complexity use cases.
Availability
DS26334GN is available at Aetrix Electronics and suitable for wireless base stations, E1/T1 multiplexers, and ISDN primary rate interface equipment requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for DS26334GN 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 power management ICs for industrial, communications, and computing applications.
The DS26334GN belongs to Maxim's telecom line interface portfolio, designed specifically for carrier-class E1/T1/J1 physical layer interfacing in space-constrained, thermally demanding infrastructure equipment.
FAQ
What is the operating temperature range specified for the DS26334GN?
The DS26334GN is rated for industrial operation from -40°C to +85°C. This specification is explicitly tied to the "GN" suffix in the ordering code and qualifies the device for deployment in outdoor cabinets, remote radio units, and other uncontrolled-environment telecom applications where extended thermal performance is mandatory. The DS26334GN meets this range without derating under full 16-channel load.
Does the DS26334GN require external termination resistors for E1/T1 line interfacing?
No, the DS26334GN features fully internal impedance matching for both transmit and receive paths, eliminating the need for external termination resistors. This capability is confirmed in the device's FEATURES section and supported by Table 5-6 (LIU Front-End Values) and Figure 5-8 (LIU Front-End). Software-selectable impedance values allow per-channel optimization without hardware changes.
How does the DS26334GN handle clock generation for E1 and T1 standards?
The DS26334GN uses an on-chip synthesizer that accepts a single master clock (e.g., 2.048MHz for E1 or 1.544MHz for T1/J1) and internally adapts it to generate all required line and frame clocks. As stated in the GENERAL DESCRIPTION, this eliminates external clock sources. Two dedicated clock outputs (RCLK and TCLK) are provided for host synchronization or cascading.
Can the DS26334GN perform bit error rate testing while in normal operation?
Yes, the DS26334GN integrates two independent built-in BERT engines that operate concurrently with normal line traffic. Per the datasheet's Section 5.9, these testers support PRBS and repetitive pattern generation/detection on any selected channel pair without interrupting live data transmission - enabling in-service diagnostics and SLA verification.
Is JTAG boundary scan supported on the DS26334GN, and what standard does it follow?
Yes, the DS26334GN implements full IEEE 1149.1 JTAG boundary scan functionality, including EXTEST, HIGHZ, CLAMP, SAMPLE/PRELOAD, IDCODE, and BYPASS instructions. This is documented in Section 7 and Table 7-1. JTAG support enables production test, in-system programming, and failure analysis without requiring additional debug hardware or board redesign.
DS26334GN 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:
- 16
- Voltage - Supply:
- 3.135V ~ 3.465V
- Current - Supply:
- 500mA
- Power (Watts):
- -
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 256-CSBGA (17x17)
DS26334GN FAQ
1.How can I place an order for DS26334GN through Aetrix?
Please submit a Request for Quotation (RFQ) for DS26334GN 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 DS26334GN reliable?
The price and inventory of DS26334GN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS26334GN is usually 5 days.
3.What payment methods are accepted for DS26334GN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS26334GN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS26334GN?
DS26334GN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS26334GN 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 DS26334GN?
For technical support, including DS26334GN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS26334GN requirements.
6.How does Aetrix verify that DS26334GN is sourced from the original manufacturer or authorized distributors?
All DS26334GN 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 DS26334GN meets industry standards.
7.What is the process for return or replacement of DS26334GN?
All DS26334GN units undergo pre-shipment inspection (PSI). If there is an issue with DS26334GN, 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 DS26334GN part is unused and in its original packaging.
Return procedure for DS26334GN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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