Analog Devices Inc./Maxim Integrated DS26324GNA3+

Overview

DS26324GNA3+ from Maxim Integrated is a 16-channel short-haul line interface unit (LIU) supporting E1/T1/J1 protocols on a single 3.3V supply, featuring fully internal impedance matching, software-selectable transmit/receive termination, and dual built-in BERT testers. It integrates an on-chip synthesizer for clock generation from a single master clock input and supports nonintrusive G.772 monitoring in telecom infrastructure.

For engineers reviewing the DS26324GNA3+ datasheet, DS26324GNA3+ pinout, DS26324GNA3+ application, or DS26324GNA3+ equivalent, key selection considerations include its 256-ball TE-CSBGA package, E1/T1/J1 protocol flexibility per channel, crystal-less jitter attenuation, 8-bit parallel or 4-wire serial host interface, and compliance with ANSI T1.231, ITU-T G.775, and ETS 300 233 loss-of-signal detection standards.

Technical Context

The DS26324GNA3+ implements independent per-channel E1/T1/J1 selection with configurable AMI/HDB3/B8ZS encoding/decoding and dual-rail or single-rail transmit/receive modes. Its integrated PLL-based clock generator accepts master clock inputs at multiples of 1.544MHz or 2.048MHz and produces precise line-rate clocks without external crystals.

Receiver functionality includes programmable gain control for monitor mode (14dB–20dB resistive + 12dB–30dB cable attenuation), digital/analog loss-of-signal detection per T1.231/G.775/ETS 300 233, and a receiver signal level indicator spanning –2.5dB to –20dB in 2.5dB steps. Transmitter features include short-circuit protection and template-based pulse shaping per T1/E1 short-haul standards.

Key Specifications

Pinout & Package

DS26324GNA3+ is housed in a 256-ball TE-CSBGA package (15mm × 15mm, 0.8mm pitch), the smallest available footprint for a 16-channel LIU. Pin functions are defined across four quadrants supporting 16 differential line pairs (TTIP/TRING, RTIP/RRING), two clock outputs (CLKA, CLKB), master clock input (MCLK), JTAG interface (TCK/TMS/TDI/TDO/TE), and parallel/serial host control signals.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DS26524GNA3+, DS26324GNA3+ provides optimal channel count alignment for mid-density line cards while retaining full feature parity; compared with MAX32664GNA3+, it adds critical multi-standard operation, crystal-less jitter cleaning, and per-channel diagnostics - directly addressing modern telecom upgrade paths.

Availability

DS26324GNA3+ is available at Aetrix Electronics and suitable for T1 digital cross-connects, wireless base station backhaul, and E1/T1 multiplexer applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for DS26324GNA3+ 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 markets.

The DS26324GNA3+ belongs to Maxim's telecom line interface unit product line, designed specifically for carrier-grade E1/T1/J1 short-haul physical layer interfacing with emphasis on integration, diagnostics, and multi-standard flexibility.

FAQ

What is the operating temperature range for DS26324GNA3+?

The DS26324GNA3+ is rated for industrial operation from –40°C to +85°C. This extended temperature range ensures reliable performance in outdoor wireless base stations, central office environments, and industrial telecom equipment where ambient conditions exceed commercial limits. The DS26324GNA3+ maintains full specification compliance-including impedance matching accuracy, LOS detection thresholds, and BERT functionality-across this entire range.

Does DS26324GNA3+ support both E1 and T1 on the same device simultaneously?

Yes, DS26324GNA3+ supports simultaneous E1 and T1 operation across its 16 channels. Each channel can be independently configured for E1 (2.048Mbps), T1 (1.544Mbps), or J1 (1.544Mbps) using register-controlled settings. This enables hybrid line cards that terminate mixed E1/T1 feeds without external multiplexing or separate ICs, reducing system complexity and bill-of-materials cost.

How does the crystal-less jitter attenuator in DS26324GNA3+ function?

The DS26324GNA3+ implements a PLL-based jitter attenuator that cleans incoming line-recovered clocks or master clock inputs without requiring an external crystal. It uses an internal VCO and feedback loop to suppress high-frequency jitter components while preserving low-frequency wander, meeting ITU-T G.823/G.824 mask requirements. This eliminates crystal placement, layout sensitivity, and aging-related drift issues common in traditional jitter cleaners.

What host interface options does DS26324GNA3+ provide?

DS26324GNA3+ supports two host interface modes: an 8-bit parallel bus compatible with Intel or Motorola timing protocols (configurable via strap pins), and a 4-wire serial interface (clock, data in/out, chip select). Both interfaces allow full register access for configuration, status monitoring, and BERT control. The parallel interface achieves faster setup times; the serial interface minimizes pin count and routing complexity.

Is DS26324GNA3+ pin-compatible with earlier DS26324 variants like DS26324GN+?

Yes, DS26324GNA3+ is pin-compatible with DS26324GN+ and DS26324G+. All share the identical 256-ball TE-CSBGA package, identical pin assignments, and identical electrical interface specifications. The "A3" suffix denotes a specific wafer fabrication revision with updated process and enhanced ESD robustness, but requires no PCB or firmware changes when replacing prior versions.