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Microchip Technology MT9072AV2
- Part No.:
- MT9072AV2
- Manufacturer:
- Microchip Technology
- Category:
- Telecom
- Package:
- 220-LBGA
- Datasheet:
-
MT9072AV2.pdf
- Description:
- IC TELECOM INTERFACE 220LBGA
- Quantity:
- Payment:
- Shipping:
Inventory:2,064
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Product details
Overview
MT9072AV2 from Zarlink Semiconductor is an octal T1/E1/J1 framing IC integrating eight fully independent framers, supporting D4/ESF/T1DM (T1), Basic/CRC4/Signaling Multiframing (E1), and J1 modes. It operates from a 3.3 V supply with 5 V tolerant inputs, features IEEE-1149.1 JTAG test port, and delivers ST-BUS/GCI/IMA backplane interfaces up to 8.192 Mbit/s - deployed in digital cross-connect systems and wireless base stations.
For engineers reviewing the MT9072AV2 datasheet, MT9072AV2 pinout, MT9072AV2 application, or MT9072AV2 equivalent, this device requires attention to per-framer timeslot assignment, elastic buffer configuration for wander tolerance (208 UI peak-to-peak transmit / 142 UI receive), HDLC FIFO depth (32 bytes), national bit access (Sa4–Sa8), and dual-rail NRZ/AMI line interface support.
Technical Context
The MT9072AV2 implements eight parallel framer engines, each with independent framing algorithm selection (D4, ESF, CRC-4, CAS), programmable slip buffers, and embedded HDLC with 32-byte TX/RX FIFOs. Framing synchronization supports free-run, software reset, or incoming multiframe lock, with automatic reframe triggered by configurable error thresholds.
It provides dual-mode backplane connectivity: selectable 2.048 Mbit/s or 8.192 Mbit/s ST-BUS, plus GCI and IMA (Inverse Multiplexing for ATM) at 1.544/2.048 Mbit/s. Signaling handling includes per-timeslot CAS (ABCD/AB bits), CCS routing via CSTi/CSTo, and Sa-bit monitoring with maskable change-of-state interrupts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Number of Framers | Eight fully independent T1/E1/J1 framers - enables simultaneous multi-protocol aggregation in add/drop multiplexers. |
| Supply Voltage | 3.3 V nominal, with 5 V tolerant digital inputs - simplifies level-shifting in mixed-voltage telecom backplanes. |
| ST-BUS Data Rate | Selectable 2.048 Mbit/s or 8.192 Mbit/s - supports both E1 PCM30 and high-density ST-BUS payload transport. |
| Wander Tolerance | 208 UI peak-to-peak (Tx), 142 UI (Rx) - meets GR-303 and ITU-T G.823 jitter/wander requirements for CO/PBX interfaces. |
| HDLC FIFO Depth | 32 bytes transmit and receive - accommodates typical V5.2 or GR-303 control message lengths without overflow. |
| Framing Standards | T1: ANSI T1.102/T1.403, Telcordia GR-303; E1: ETSI ETS 300 233/347, ITU-T G.704/G.706 - certified for global carrier-grade deployment. |
| Alarm Detection | Integrated Yellow, AIS, LOS, RAI, and Sa-bit alarms - enables autonomous fault reporting in DCS and access nodes without host polling. |
Pinout & Package
MT9072AV2 is housed in a 220-pin PBGA package (15 mm × 15 mm, 1.0 mm pitch), Pb-free (Sn/Ag/Cu), rated for –40°C to +85°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RxMF[0–7] | Receive Multiframe Boundary | Indicates start of multiframe for each framer - used to align HDLC or signaling processing to frame boundaries. |
| TXMF[0–7] | Transmit Multiframe Boundary | Signals multiframe start on transmit path - synchronizes CAS bit insertion and Sa-bit transmission timing. |
| CSTi[0–7] | Common Channel Signaling Input | Routes external CCS data (e.g., V5.2 messages) into framer for timeslot-16 or dedicated CCS channel mapping. |
| CSTo[0–7] | Common Channel Signaling Output | Delivers extracted CCS signaling from timeslot-16 or assigned CCS channels to external HDLC controller. |
| RxDL[0–7] | Receive Data Link | Provides full B8ZS/HDB3-decoded receive stream including framing bits - used for FDL (T1) or Sa-bit (E1) analysis. |
| TxDL[0–7] | Transmit Data Link | Injects datalink content onto FDL (T1) or Sa4–Sa8 bits (E1) - supports embedded HDLC or external protocol adaptation. |
| TDI/TDO/TMS/TCK/TRST | IEEE 1149.1 JTAG Test Port | Enables boundary-scan testing and in-system programming - critical for production test and field diagnostics. |
Key Features
| Feature | Design Value |
|---|---|
| Per-framer timeslot assignment | Enables flexible routing of PCM24 (T1) or PCM30 (E1) channels to ST-BUS channels 0–31 - essential for V5.2 and GR-303 interface mapping. |
| Programmable elastic buffers | Two-frame slip buffers with independent Tx/Rx control and wander compensation - maintains synchronization across asynchronous clock domains in DCS. |
| Embedded HDLC engine | Full-featured floating HDLC per framer with zero insertion/deletion, FCS generation/detection, and end-of-packet interrupts - eliminates need for external HDLC controllers in V5.x nodes. |
| Multi-standard alarm generation | Detects Yellow, AIS, LOS, RAI, and Sa-bit alarms per framer with latched status and maskable interrupts - reduces host CPU overhead in real-time monitoring. |
| Robbed-bit & CAS signaling | Per-channel AB/ABCD bit extraction/insertion with 6 ms (T1) or 14 ms (E1) debouncing - ensures reliable CAS handling in legacy PBX and CO environments. |
Applications
| V5.2 Access Network Interface | Primary Rate ISDN Node |
|---|---|
|
Use Scenario: Aggregating multiple E1 lines from remote concentrators into a centralized switching node using V5.2 protocol stack. IC Role / Device Role / Timing Role: MT9072AV2 acts as the physical layer framer and signaling gateway, mapping Sa-bits and timeslot-16 CCS to ST-BUS for upstream V5.2 controller. Use Value: Enables full compliance with ETSI ETS 300 347, supporting dynamic timeslot allocation and CAS/CCS interworking without external logic. |
Use Scenario: Implementing PRI handoff between PSTN and IP-PBX systems requiring T1/E1 framing, CAS, and performance monitoring. IC Role / Device Role / Timing Role: MT9072AV2 serves as the line interface unit (LIU), handling D4/ESF framing, robbed-bit signaling, and AIS/LOS detection. Use Value: Delivers carrier-grade alarm reporting (Yellow, RAI, FAS errors) and per-timeslot PRBS testing - accelerating field commissioning and maintenance. |
| Digital Cross-Connect System (DCS) | Wireless Base Station Backhaul |
|
Use Scenario: Building reconfigurable T1/E1 grooming fabric in central office DCS platforms with strict wander and jitter requirements. IC Role / Device Role / Timing Role: MT9072AV2 provides eight independent framing paths with programmable elastic buffers and ST-BUS output for switch fabric interface. Use Value: Achieves 208 UI peak-to-peak wander tolerance and supports hitless reconfiguration via software-controlled reframing - meeting GR-303 timing stability mandates. |
Use Scenario: Connecting BTS equipment to BSC via T1/E1 links in macrocell deployments requiring robust framing and alarm propagation. IC Role / Device Role / Timing Role: MT9072AV2 functions as the framer and maintenance channel processor, extracting FDL/Sa-bits for OAM&P messaging. Use Value: Integrates HDLC, slip buffers, and error counters - reducing bill-of-materials and enabling real-time link health telemetry over backhaul. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal T1/E1 framer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MT9077AV2 | Successor device with enhanced IMA support, lower power, and extended temperature range (–40°C to +105°C); same 220-pin PBGA footprint. | Targeted at newer DCS and metro edge platforms requiring higher reliability and thermal margin. | Select MT9077AV2 for new designs needing extended temp rating and improved IMA latency; MT9072AV2 remains valid for legacy GR-303-compliant systems. |
| DS2155-8 | Octal T1/E1 framer from Maxim Integrated; supports identical framing modes but lacks integrated HDLC and uses 208-pin LQFP (discontinued per ordering info). | Suitable for cost-sensitive, space-constrained designs where external HDLC is acceptable and Pb-free PBGA is not required. | Choose DS2155-8 only if existing PCB layout accommodates LQFP and system architecture includes separate HDLC controller. |
Compared with MT9077AV2, the MT9072AV2 offers proven GR-303/V5.2 interoperability with mature driver support, while DS2155-8 requires external HDLC and has limited Pb-free availability - making MT9072AV2 the optimal choice for carrier-grade replacements and long-lifecycle telecom infrastructure.
Availability
MT9072AV2 is available at Aetrix Electronics and suitable for digital cross-connect systems, wireless base station backhaul, and V5.2 access network interfaces requiring stable component supply and long-term obsolescence management.
Supply support for MT9072AV2 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
Zarlink Semiconductor was a fabless semiconductor company specializing in communications ICs, acquired by Microsemi in 2011. Its products targeted carrier-grade telecom infrastructure with emphasis on timing, framing, and interface integrity.
The MT9072AV2 belongs to Zarlink's T1/E1/J1 framer product line, designed specifically for multi-protocol aggregation in CO/PBX equipment, DCS, and V5.x access networks - emphasizing standards compliance, low-latency elastic buffering, and per-framer configurability.
FAQ
What is the operating temperature range for the MT9072AV2?
The MT9072AV2 is specified for industrial operation from –40°C to +85°C. This range is explicitly stated in the Ordering Information section of the datasheet for the "MT9072AV2" variant, and aligns with its intended use in carrier-grade central office and outdoor base station environments where thermal resilience is critical. The MT9072AV2 maintains full electrical performance across this range without derating.
Does the MT9072AV2 support both T1 and E1 framing simultaneously?
Yes, the MT9072AV2 supports concurrent T1 and E1 operation - each of its eight framers can be independently configured for T1 (D4/ESF/T1DM), E1 (Basic/CRC4/CAS), or J1 mode via software register writes. This per-framer flexibility enables mixed-protocol line cards, such as those aggregating T1 trunks from enterprise sites and E1 links from regional exchanges within a single DCS shelf.
What line coding schemes does the MT9072AV2 support on the physical layer interface?
The MT9072AV2 supports B8ZS line coding in T1/J1 mode and HDB3 in E1 mode, along with optional pulse density enforcement, forced ones insertion (bit 7), and multiple zero suppression codes (GTE, Bell, DDS). These are implemented in the physical layer interface block and are configurable per framer, ensuring compatibility with legacy and modern telco line drivers.
How does the MT9072AV2 handle national (Sa) bits in E1 mode?
In E1 mode, the MT9072AV2 provides three access methods for Sa bits: direct register read/write (single byte), five-byte national bit buffers (transmit/receive), and pin-level access via RxDL/TxDL. It also generates a maskable interrupt on any Sa-bit state change and supports Sa-bit CRC-4 updating when intermediate datalinks modify Sa4 - all confirmed in Sections 4.2.2 and 6.2.2 of the datasheet.
Is the MT9072AV2 pin-compatible with other devices in the MT907x family?
The MT9072AV2 shares the same 220-pin PBGA package and core pinout with the MT9077AV2, including identical placement of RxDL/TxDL, CSTi/CSTo, RxMF/TxMF, and JTAG signals. However, functional differences exist in IMA implementation and power sequencing - so while PCB layout reuse is possible, firmware and power design must be validated against the respective datasheets before substitution.
MT9072AV2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 220-LBGA
- Packaging:
- Tray
- Product Status:
- Obsolete
- Function:
- -
- Interface:
- -
- Number of Circuits:
- 1
- Voltage - Supply:
- 3V ~ 3.6V
- Current - Supply:
- 30mA
- Power (Watts):
- -
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 220-LBGA (17x17)
MT9072AV2 FAQ
1.How can I place an order for MT9072AV2 through Aetrix?
Please submit a Request for Quotation (RFQ) for MT9072AV2 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 MT9072AV2 reliable?
The price and inventory of MT9072AV2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MT9072AV2 is usually 5 days.
3.What payment methods are accepted for MT9072AV2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MT9072AV2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MT9072AV2?
MT9072AV2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MT9072AV2 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 MT9072AV2?
For technical support, including MT9072AV2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MT9072AV2 requirements.
6.How does Aetrix verify that MT9072AV2 is sourced from the original manufacturer or authorized distributors?
All MT9072AV2 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 MT9072AV2 meets industry standards.
7.What is the process for return or replacement of MT9072AV2?
All MT9072AV2 units undergo pre-shipment inspection (PSI). If there is an issue with MT9072AV2, 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 MT9072AV2 part is unused and in its original packaging.
Return procedure for MT9072AV2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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