Analog Devices Inc./Maxim Integrated DS26334GA3

Overview

DS26334GA3 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 delivers -38dB T1 and -43dB E1 receiver sensitivity with 2.5dB resolution signal level indication, and integrates dual BERT testers for diagnostics in telecom infrastructure.

For engineers reviewing the DS26334GA3 datasheet, DS26334GA3 pinout, DS26334GA3 application, or DS26334GA3 equivalent, key selection criteria include its 256-ball TE-CSBGA package, G.772 nonintrusive monitoring capability, software-selectable AMI/HDB3/B8ZS encoding, dual-rail/single-rail mode support, and compliance with ANSI T1.231, ITU-T G.775, and ETS 300 233 loss-of-signal standards.

Technical Context

The DS26334GA3 implements a fully integrated LIU architecture with independent transmit/receive front-ends per channel, each configurable for short- or long-haul operation via template selection registers. Its on-chip synthesizer accepts master clock inputs at multiples of 1.544MHz (T1/J1) or 2.048MHz (E1) and generates all required line clocks without external PLLs.

Receiver functionality includes analog/digital loss-of-signal detection per T1.231/G.775/ETS 300 233, AIS detection/generation, bipolar violation and excessive zero monitoring, and programmable receive monitor mode supporting 14–30dB resistive + 12–30dB cable attenuation combinations.

Key Specifications

Pinout & Package

The DS26334GA3 is housed in a 256-ball TE-CSBGA (Thermally Enhanced Chip Scale Ball Grid Array) package, measuring 15mm × 15mm with 0.8mm ball pitch. This is the smallest available package for a 16-channel LIU, optimized for high-density telecom line card layouts.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar line interface unit applications.

Compared with DS21Q55 and MAX3395E, the DS26334GA3 uniquely delivers 16-channel integration, crystal-less jitter attenuation, and G.772-compliant monitoring in a single 3.3V device-making it the only option for high-density, carrier-grade E1/T1/J1 line cards requiring autonomous diagnostics and minimal external components.

Availability

DS26334GA3 is available at Aetrix Electronics and suitable for T1 digital cross-connects, wireless base station backhaul, and E1/T1/J1 multiplexers requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for DS26334GA3 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 solutions for industrial, communications, and computing markets.

The DS26334GA3 belongs to Maxim's telecom line interface product line, designed specifically for carrier-class E1/T1/J1 infrastructure equipment requiring high channel density, low power, and comprehensive diagnostic capabilities.

FAQ

What is the operating temperature range for the DS26334GA3?

The DS26334GA3 is rated for operation from -40°C to +85°C, making it suitable for industrial and outdoor telecom environments including wireless base stations and central office line cards. This extended temperature grade is confirmed by the 'N' suffix in the ordering code and aligns with the DS26334GN+ variant specification. The DS26334GA3 maintains full electrical performance-including receiver sensitivity, jitter attenuation, and BERT accuracy-across this entire range.

Does the DS26334GA3 require external termination resistors?

No, the DS26334GA3 features fully internal impedance matching for both transmit and receive paths, eliminating the need for external termination resistors. This capability is explicitly stated in the device's FEATURES section and verified in the "LIU Front-End" block diagram and Table 5-6 (LIU Front-End Values). The internal match supports 100Ω (T1) and 120Ω (E1) line impedances, reducing BOM cost and PCB area while improving consistency across channels.

How does the DS26334GA3 handle clock generation and jitter attenuation?

The DS26334GA3 integrates an on-chip synthesizer that accepts a single master clock (e.g., 19.44MHz, 25.6MHz, or other integer multiples of 1.544/2.048MHz) and generates all required E1/T1/J1 line clocks internally. Its crystal-less jitter attenuator uses a PLL-based architecture (Figure 5-5 and Section 5.6) to clean recovered clock signals, meeting ITU-T G.823/G.824 jitter transfer and tolerance requirements without external VCXOs or clock cleaners.

What host interface options does the DS26334GA3 support?

The DS26334GA3 supports both an 8-bit parallel interface (configurable for Intel or Motorola bus timing) and a 4-wire serial interface (SPI-like), selected via the MODE pin. Parallel mode supports nonmultiplexed and multiplexed addressing with full interrupt handling (Section 5.1); serial mode uses CLK, CS, SDI, and SDO signals with configurable CLKE polarity (Table 9-7). Both interfaces provide full register-level access to all 16 LIUs, BERT engines, and monitoring functions.

Is the DS26334GA3 RoHS compliant and lead-free?

Yes, the DS26334GA3 carries the '+' suffix in its ordering code, which Maxim specifies as denoting a lead(Pb)-free and RoHS-compliant package. This is explicitly documented in the ORDERING INFORMATION table under the DS26334G+ and DS26334GN+ variants. The TE-CSBGA package uses matte tin finish on solder balls and complies with JEDEC J-STD-020 moisture sensitivity level (MSL) 3 requirements.