Texas Instruments TSB82AF15TPZTEP

Overview

TSB82AF15TPZTEP from Texas Instruments is a radiation-tolerant, extended-life-cycle PCI Express™ to IEEE 1394b OHCI link-layer controller IC in 100-pin TQFP (PZT) package. It implements a single-lane PCIe Gen1 interface (2.5 Gbps), supports IEEE 1394b s400/s800 PHY interfacing, delivers eight 3.3-V GPIOs, and enables active-state power management via L0s/L1 states for avionics and medical systems.

For engineers reviewing the TSB82AF15TPZTEP datasheet, TSB82AF15TPZTEP pinout, TSB82AF15TPZTEP application, or TSB82AF15TPZTEP equivalent, this page provides verified electrical specifications, PCIe/1394b interface timing constraints, GPIO configuration details, thermal derating guidance, and validated drop-in alternatives for defense-grade system integration.

Technical Context

The TSB82AF15TPZTEP integrates a PCIe-to-PCI bridge core with an embedded 1394b OHCI link-layer controller, enabling full protocol translation between PCIe root complex and external 1394b physical layer devices. It supports up to four concurrent posted write, non-posted, and completion transactions per direction, with 8-KB posted write/completion queues and 128-byte non-posted queues.

It operates with a 100-MHz differential PCIe reference clock (REFCLK±), requires 1.5-V core (VDD_15/VDDA_15) and 3.3-V I/O (VDD_33/VDDA_33) supplies, and implements D1/D2/D3hot power states plus L0s/L1 active-state link power management. The device uses CTL[1:0]/D[7:0]/LCLK/PCLK/LINKON/PINT signals to synchronize bidirectional data and control exchange with external 1394b PHYs.

Key Specifications

Pinout & Package

TSB82AF15TPZTEP is housed in a 100-pin TQFP package (PZT), 14.00 mm × 14.00 mm body size, with exposed thermal pad. Pin functions include PCIe differential I/O (TXP/TXN/RXP/RXN), 1394b PHY interface signals (D[7:0], CTL[1:0], LCLK, PCLK, LINKON, PINT), dual-voltage power domains (1.5-V core, 3.3-V I/O), eight GPIOs, EEPROM interface (SCL/SDA), and dedicated reset inputs (GRST, PERST).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar PCIe-to-1394b bridge applications.

Compared with TSB82AF15TPZTEP, TUSB8041 addresses USB-not 1394b-interfacing, while TSB43AB22A forces PCI bus dependency and lacks integrated PCIe translation, making both unsuitable as direct replacements for new PCIe-hosted 1394b designs requiring radiation tolerance and extended lifecycle support.

Availability

TSB82AF15TPZTEP is available at Aetrix Electronics and suitable for avionics data acquisition, medical imaging interface, factory automation control, and secure defense communications requiring stable component supply across extended product lifecycles.

Supply support for TSB82AF15TPZTEP 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

Texas Instruments is a global semiconductor company specializing in analog, embedded processing, and connectivity solutions for industrial, automotive, and aerospace markets.

The TSB82AF15TPZTEP belongs to TI's radiation-tolerant interface controller product line, designed specifically for high-integrity PCIe-to-IEEE 1394b bridging in safety-critical defense, avionics, and medical systems.

FAQ

What is the PCIe interface specification supported by the TSB82AF15TPZTEP?

The TSB82AF15TPZTEP implements a single-lane PCIe Gen1 interface compliant with PCI Express Base Specification Revision 1.1, operating at 2.5 Gbps per lane. It uses differential TXP/TXN and RXP/RXN pins, supports L0s/L1 active-state power management, and requires a 100-MHz differential reference clock. The TSB82AF15TPZTEP does not support PCIe Gen2 or higher speeds.

Does the TSB82AF15TPZTEP support IEEE 1394b s800 operation?

Yes, the TSB82AF15TPZTEP is fully compliant with IEEE Std P1394b-2002 and supports both s400 (400 Mbps) and s800 (800 Mbps) physical layer configurations when paired with a compatible 1394b PHY. Its OHCI link-layer controller handles speed negotiation, packet formatting, and isochronous resource management per IEEE 1394a-2000 and 1394-1995 standards.

How many GPIOs does the TSB82AF15TPZTEP provide, and what are their voltage levels?

The TSB82AF15TPZTEP provides eight 3.3-V multifunction General-Purpose I/O terminals (GPIO0–GPIO7), each configurable as input or output via the GPIO control register. Each GPIO has an internal active pullup resistor and operates at 3.3-V logic levels, compatible with VDD_33 and VDDA_33 supply domains. These GPIOs support hardware-triggered interrupts and cycle-synchronized timing signals like CYCLEOUT.

What power supply rails are required for proper operation of the TSB82AF15TPZTEP?

The TSB82AF15TPZTEP requires two primary supply domains: 1.5-V digital core power (VDD_15, VDDA_15, VDD_15_COMB) and 3.3-V I/O power (VDD_33, VDDA_33, VDD_33_COMB, VDD_33_AUX). All supplies must be filtered per TI's layout guidelines; VDDA_15 and VDDA_33 serve analog sections, while VSSA and VSSA_PCIE provide dedicated analog ground returns.

Is the TSB82AF15TPZTEP pin-compatible with any other Texas Instruments 1394b controllers?

No, the TSB82AF15TPZTEP is not pin-compatible with other TI 1394b controllers such as the TSB43AB22A (128-pin LQFP) or TSB82AA2 (100-pin TQFP with different pinout). Its 100-pin PZT package has unique signal assignments-including PCIe-specific TXP/TXN/RXP/RXN, REFCLK±, and GRST/PERST-and requires dedicated PCB layout per the SCPS271 datasheet.