My Inquiry
My Account
Analog Devices Inc./Maxim Integrated DS21Q50L-C01
- Part No.:
- DS21Q50L-C01
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Telecom
- Package:
- 100-LQFP
- Datasheet:
-
DS21Q50L-C01.pdf
- Description:
- DS21Q50 QUAD E1 TRANSCEIVER
- Quantity:
- Payment:
- Shipping:
Inventory:820
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
DS21Q50L-C01 from Maxim Integrated is a quad E1 transceiver IC designed for high-density E1 line termination in telecom infrastructure. It integrates four independent E1 framer/transceiver channels, on-chip clock/data recovery for AMI/HDB3 waveforms, selectable 32-bit or 128-bit jitter attenuation, and supports 75Ω coax and 120Ω twisted-pair interfaces up to 2km. It operates at 3.3V and delivers full ITU-T G.703/G.704/G.706/G.823 compliance for DSLAMs and IMA equipment.
For engineers reviewing the DS21Q50L-C01 datasheet, DS21Q50L-C01 pinout, DS21Q50L-C01 application, or DS21Q50L-C01 equivalent, this device serves as a complete E1 interface solution with integrated elastic store, PRBS generation/detection, configurable parallel/serial control, and hardware-selectable jitter attenuator placement in transmit or receive paths.
Technical Context
The DS21Q50L-C01 implements four independent E1 transceivers, each with dedicated receive clock/data recovery (RCLK), transmit clock input (TCLK), serial data I/O (RSER/TSER), and sync signals (RSYNC/TSYNC). Each channel supports FAS, CAS, CCS, and CRC4 framing formats and includes bipolar violation (BPV), CRC4 error, and FAS word error counters.
It features an interleave bus option (IBO) enabling multiplexing of up to eight E1 streams onto a single 16.384MHz PCM bus, plus a 4/8/16MHz clock synthesizer that locks to any E1 line for system clock derivation - all without external logic. The receive-side two-frame elastic store manages asynchronous slip conditions between recovered E1 data and backplane SYSCLK.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| E1 Channels | Four fully independent E1 transceivers with separate analog line interfaces and digital framing logic. |
| Jitter Attenuation | Selectable 32-bit or 128-bit crystal-less jitter attenuator assignable to transmit or receive path per channel. |
| Line Interface | Supports both 75Ω coax and 120Ω twisted-pair; receives AMI/HDB3 waveforms with -43dBm sensitivity over 2km cable. |
| System Clock | Integrated 4/8/16MHz synthesizer phase-locked to any E1 line; eliminates need for external clock source or PLL. |
| PCM Bus Speed | Interleaved PCM bus operation up to 16.384MHz, enabling eight-channel aggregation without external multiplexers. |
| Power Supply | 3.3V low-power CMOS operation with separate analog/digital supply domains (RVDD/DVDD/TVDD). |
| Framing Support | FAS, CAS, CCS, and CRC4 multiframe alignment with automatic alarm detection (AIS, remote alarm, LOC, LOS). |
Pinout & Package
DS21Q50L-C01 is housed in a 100-pin LQFP package (14mm × 14mm) with dedicated analog/digital power and ground domains, four independent E1 analog I/O pairs (RRING/RTIP and TRING/TTIP), and dual-control port options (parallel or serial).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RRING1–RRING4 RTIP1–RTIP4 |
Receive analog inputs | Differential analog inputs for AMI/HDB3 waveform reception from four E1 lines; require transformer coupling. |
| TRING1–TRING4 TTIP1–TTIP4 |
Transmit analog outputs | Differential analog outputs generating G.703-compliant waveshapes for 75Ω or 120Ω line driving. |
| RSER1–RSER4 TSER1–TSER4 |
Serial data I/O | NRZ serial data interface between framer and backplane; supports time-slot-aligned PCM data transfer. |
| RSYNC1–RSYNC4 TSYNC1–TSYNC4 |
Frame sync signals | Indicate frame/multiframe boundaries for synchronization of downstream processing or buffering. |
| SYSCLK1–SYSCLK4 | System clock input | Accepts 2.048/4.096/8.192/16.384MHz clock for elastic store and IBO timing; enables asynchronous backplane interfacing. |
| D0/AD0–D7/AD7 A0–A4, ALE, CS, WR, RD |
Parallel control port | 8-bit multiplexed address/data bus with standard Intel/Motorola timing for register access and configuration. |
| BTS0/BTS1, PBTS | Bus mode select | Hardware-configurable pins defining parallel vs. serial port operation and bus protocol (Intel/Motorola). |
Key Features
| Feature | Design Value |
|---|---|
| Four E1 transceivers in one IC | Reduces board space and BOM count versus discrete solutions; enables 4× E1 density in single 100-pin LQFP. |
| Interleaved PCM bus (IBO) | Aggregates up to eight E1 streams onto one 16.384MHz bus, eliminating external multiplexers and glue logic. |
| Configurable elastic store | Two-frame receive-side buffer absorbs frequency/phase slips between asynchronous E1 lines and backplane clock. |
| PRBS generation/detection | On-chip pattern generator and detector per channel support loopback testing and link integrity verification. |
| User-configurable outputs (OUTA/OUTB) | Eight GPIO-like pins (four OUTA + four OUTB) programmable for status signaling, alarm indication, or control functions. |
| Automatic alarm handling | Detects and generates AIS, remote alarm, loss-of-signal, and loss-of-sync conditions per channel without host intervention. |
Applications
| DSLAM Line Cards | Routers with E1 WAN Interfaces |
|---|---|
|
Use Scenario: High-port-density DSLAM line cards terminating multiple E1 trunks from central office switches. IC Role / Device Role / Timing Role: Primary E1 physical layer transceiver providing clock recovery, framing, jitter attenuation, and alarm monitoring for each E1 port. Use Value: Enables 4-channel E1 termination per IC with integrated IBO, reducing component count and PCB area while maintaining full G.703/G.704 compliance. |
Use Scenario: Enterprise or carrier-grade routers requiring native E1 connectivity for WAN uplinks or TDM backhaul. IC Role / Device Role / Timing Role: E1 line interface IC delivering NRZ serial data to router's packet processor with precise frame-aligned timing via RSYNC/TSYNC. Use Value: Eliminates need for external clock synthesizers or jitter cleaners; supports both short-haul (0km) and long-haul (2km+) twisted-pair deployments. |
| IMA Equipment | WAN Aggregation Platforms |
|
Use Scenario: IMA (Inverse Multiplexing over ATM) systems bonding multiple E1 lines into a single logical high-bandwidth pipe. IC Role / Device Role / Timing Role: Synchronized E1 transceiver with elastic store and IBO enabling precise time-slot interleaving across four E1 links. Use Value: Provides deterministic latency and slip management required for IMA cell reassembly; supports CRC4-based multiframe alignment. |
Use Scenario: Industrial or telco WAN aggregation platforms consolidating legacy E1 traffic into IP/MPLS networks. IC Role / Device Role / Timing Role: E1-to-PCM bridge converting analog E1 signals into time-division multiplexed digital streams for packet encapsulation. Use Value: Delivers 16.384MHz interleaved PCM output compatible with standard TDM-over-IP gateways and DSP interfaces. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad E1 transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DS21Q55 | Pin-compatible upgrade with extended temperature range (-40°C to +85°C), enhanced jitter tolerance, and improved ESD rating. | Preferred for industrial or outdoor base station deployments where extended thermal stability is required. | Direct drop-in replacement for DS21Q50L-C01 in new designs needing wider operating margin. |
| Si5338A-B-GM | Programmable clock generator (not transceiver); lacks E1 framing, line interface, or PRBS functions - only provides clock synthesis. | Used only as supplemental clock source when DS21Q50L-C01's internal synthesizer is insufficient for system-level timing architecture. | Not a functional alternative; only considered alongside DS21Q50L-C01 for advanced clock tree design, not as standalone replacement. |
Compared with DS21Q50L-C01, DS21Q55 offers identical functionality with higher thermal resilience and tighter jitter specs, while Si5338A-B-GM serves only as a complementary clock source - neither replaces the full E1 transceiver capability of DS21Q50L-C01.
Availability
DS21Q50L-C01 is available at Aetrix Electronics and suitable for DSLAM line cards, E1-enabled routers, IMA equipment, WAN aggregation platforms, and telecom infrastructure requiring stable component supply and long-term lifecycle support.
Supply support for DS21Q50L-C01 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 precision analog, mixed-signal, and high-reliability ICs for communications, industrial, and automotive markets.
The DS21Q50L-C01 belongs to Maxim's telecom line interface product line, engineered specifically for high-density E1/E2 physical layer termination in carrier-grade access and aggregation equipment.
FAQ
What is the operating temperature range for DS21Q50L-C01?
The DS21Q50L-C01 is rated for commercial temperature operation from 0°C to +70°C. This specification aligns with the "L" suffix in the part number and is validated per Maxim's datasheet Rev 013004. It is intended for indoor telecom equipment such as DSLAM line cards and enterprise routers where ambient thermal conditions remain within this envelope. DS21Q50L-C01 does not support extended industrial temperature ranges.
Does DS21Q50L-C01 support both coaxial and twisted-pair E1 interfaces?
Yes, DS21Q50L-C01 supports both 75Ω coaxial and 120Ω twisted-pair E1 interfaces. Its transmit line driver generates G.703-compliant waveshapes for either medium, and its receive circuitry accommodates AMI/HDB3 waveforms across cable lengths up to 2km on 22AWG twisted pair. Configuration is handled via internal registers - no external components are required to switch between interface types.
How many E1 lines can DS21Q50L-C01 handle simultaneously?
DS21Q50L-C01 handles four E1 lines simultaneously - one per integrated transceiver channel. Each channel includes independent analog front-end (RRING/RTIP and TRING/TTIP), framer logic, jitter attenuator, and control registers. The device also supports interleave bus operation (IBO), allowing two DS21Q50L-C01 devices to jointly manage eight E1 lines on a shared 16.384MHz PCM bus.
What clock frequencies does the internal synthesizer in DS21Q50L-C01 generate?
The internal clock synthesizer in DS21Q50L-C01 generates 4.096MHz, 8.192MHz, and 16.384MHz outputs. These are derived from and phase-locked to any selected E1 line's 2.048MHz reference, enabling fully autonomous system clock generation without external oscillators or PLLs. The synthesizer output is routed to the 4/8/16MCK pin and used for IBO timing and elastic store synchronization.
Can DS21Q50L-C01 perform PRBS testing on individual E1 channels?
Yes, DS21Q50L-C01 includes dedicated PRBS generation and detection circuitry per channel. Each transceiver supports configurable PRBS patterns (2^15–1, 2^23–1) for transmit, with real-time error counting on the receive side. This enables per-channel bit-error-rate validation during manufacturing test or field diagnostics without host CPU overhead - a capability confirmed in Sections 8 and 42 of the DS21Q50 datasheet.
DS21Q50L-C01 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 100-LQFP
- Packaging:
- Bulk
- Product Status:
- Active
- Function:
- Transceiver
- Interface:
- E1
- Number of Circuits:
- 4
- Voltage - Supply:
- 3.135V ~ 3.465V
- Current - Supply:
- 230mA
- Power (Watts):
- -
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 100-LQFP (14x14)
DS21Q50L-C01 FAQ
1.How can I place an order for DS21Q50L-C01 through Aetrix?
Please submit a Request for Quotation (RFQ) for DS21Q50L-C01 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 DS21Q50L-C01 reliable?
The price and inventory of DS21Q50L-C01 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS21Q50L-C01 is usually 5 days.
3.What payment methods are accepted for DS21Q50L-C01?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS21Q50L-C01 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS21Q50L-C01?
DS21Q50L-C01 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS21Q50L-C01 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 DS21Q50L-C01?
For technical support, including DS21Q50L-C01 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS21Q50L-C01 requirements.
6.How does Aetrix verify that DS21Q50L-C01 is sourced from the original manufacturer or authorized distributors?
All DS21Q50L-C01 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 DS21Q50L-C01 meets industry standards.
7.What is the process for return or replacement of DS21Q50L-C01?
All DS21Q50L-C01 units undergo pre-shipment inspection (PSI). If there is an issue with DS21Q50L-C01, 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 DS21Q50L-C01 part is unused and in its original packaging.
Return procedure for DS21Q50L-C01:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DS21Q50L-C01 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…
