Overview
The TSB41BA3B-EP, produced by Texas Instruments, is a three-port cable transceiver and arbiter designed to implement a node in a cable-based IEEE 1394 network. This component provides both digital and analog transceiver functions necessary for packet reception and transmission. It interfaces with a link-layer controller (LLC) such as the TSB82AA2, TSB12LV21, TSB12LV26, and others, and can also be connected to an integrated 1394 Link + PHY layer like the TSB43AB2. The device is powered by a single 3.3-V supply and includes an internal voltage regulator for the core voltage supply.
Key Specifications
| Parameter | Description |
|---|---|
| Package | 80-pin HTQFP - PFP (Thermally Enhanced Package) |
| Operating Temperature | -40°C to 110°C |
| Supply Voltage | 3.3 V (with optional core voltage supply) |
| Clock Frequency | 49.152 MHz (external crystal required) |
| Data Transfer Rates | 100/200/400 Mbps |
| PHY-LLC Interface Clock | 49.152 MHz (1394a mode), 98.304 MHz (1394b mode) |
| Termination Resistors | External 112-Ω termination resistor networks required |
| TPBIAS Voltage | 1.86 V nominal bias voltage for port termination |
Key Features
- Compliant with IEEE 1394a-2000 and IEEE 1394b-2002 standards
- Fail-safe circuitry to prevent loading or leakage when power is lost
- Common-mode noise filter on the incoming bias detect circuit
- Supports connection to CAT5 cable transceivers and S200 plastic optical fiber transceivers
- Optical signal detect input for all ports in beta mode
- Power-down features to conserve energy in battery-powered applications
- Separate power supply rails or planes for DVDD-CORE and PLLVDD-CORE
- Link power status (LPS) terminal for managing power usage in the node
Applications
- Avionics and defense
- Factory automation and control
- Medical applications
- Cable-based IEEE 1394 networks
- Systems requiring interoperability with various link-layer controllers and PHYs
Q & A
- What is the primary function of the TSB41BA3B-EP?
The TSB41BA3B-EP provides the digital and analog transceiver functions needed to implement a three-port node in a cable-based IEEE 1394 network.
- What are the supported data transfer rates?
The device supports data transfer rates of 100, 200, and 400 Mbps.
- What type of clock signal is required for the TSB41BA3B-EP?
An external 49.152-MHz crystal is required to generate the reference clock.
- How does the device handle power loss?
The device includes fail-safe circuitry that senses sudden loss of power and disables the ports to prevent loading or leakage.
- What is the purpose of the LPS terminal?
The LPS (link power status) terminal manages the power usage in the node and controls the state of the PHY-LLC interface.
- Can the TSB41BA3B-EP be used with different types of transceivers?
Yes, it supports connection to CAT5 cable transceivers and S200 plastic optical fiber transceivers.
- What is the nominal TPBIAS voltage provided by the TSB41BA3B-EP?
The device provides a 1.86-V nominal bias voltage for port termination.
- How is the PHY-LLC interface clock signal generated?
The PHY-LLC interface clock signal is generated by an internal phase-locked loop (PLL) using the external 49.152-MHz clock signal.
- What are the recommended termination resistors for the TSB41BA3B-EP?
External 112-Ω termination resistor networks are required, composed of series-connected ~56-Ω resistors.
- Can the TSB41BA3B-EP be used in low-power applications?
Yes, the device includes power-down features to conserve energy in battery-powered applications.
