T1 / E1 / J1 OCTAL FRAMER The **IDT82V2108BB** is a highly integrated, low-power T1/E1/J1 framer and line interface unit (LIU) manufactured by **Integrated Device Technology (IDT)**. Below are its key specifications, descriptions, and features:
### **Specifications:**
- **Interface Standards:** Supports T1 (1.544 Mbps), E1 (2.048 Mbps), and J1 (Japanese T1) framing.
- **Power Supply:** Operates at **3.3V** with low power consumption.
- **Package:** Available in a **128-pin TQFP (Thin Quad Flat Package)**.
- **Temperature Range:** Commercial (**0°C to +70°C**) and industrial (**-40°C to +85°C**) options.
- **Clock Tolerance:** Supports ±50 ppm clock tolerance for T1/E1 applications.
- **Line Coding:** HDB3 (E1), AMI/B8ZS (T1/J1).
- **Jitter Performance:** Meets ITU-T G.823, G.824, and ANSI T1.403 standards.
### **Descriptions:**
- The **IDT82V2108BB** combines a full-featured framer and LIU in a single chip, reducing system complexity.
- It supports both **short-haul and long-haul** applications with adaptive equalization and line build-out (LBO) settings.
- Includes **on-chip termination resistors** for simplified board design.
- Features **hitless switching** for clock source changes without disrupting traffic.
### **Features:**
1. **Integrated Framer & LIU:** Combines framing, clock recovery, and line interface functions.
2. **Flexible Clocking:** Supports multiple clock sources, including recovered clock and external references.
3. **Diagnostic Capabilities:**
- Loopback modes (local, remote, payload).
- Error counters for BPV, CRC, FAS, and more.
4. **Alarm Detection & Reporting:** Detects LOS, AIS, RAI, and other alarms.
5. **Low Power:** Optimized for power-sensitive applications.
6. **Software Configurable:** Programmable via a serial microprocessor interface (SPI or parallel).
7. **Compliance:** Meets ITU-T, ANSI, and ETSI standards for T1/E1/J1.
This device is commonly used in **telecom equipment, routers, gateways, and access concentrators** requiring T1/E1/J1 line interfacing.
