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Texas Instruments TSB43AB21APDT
- Part No.:
- TSB43AB21APDT
- Manufacturer:
- Texas Instruments
- Category:
- Controllers
- Package:
- 128-TQFP
- Datasheet:
-
TSB43AB21APDT.pdf
- Description:
- IC PHY/LINK LAYER CTRLR 128-TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,676
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Product details
Overview
TSB43AB21APDT from Texas Instruments is a single-port 1394a-2000 OHCI-compliant PHY/link-layer controller IC for PCI host systems, supporting S100/S200/S400 data rates (100/200/400 Mbits/s), 33-MHz PCI interface, IEEE 1394a power-down modes, and integrated SBP-2 optimized physical write posting buffers - deployed in digital video capture cards, camcorder docking stations, and professional audio interfaces.
For engineers reviewing the TSB43AB21APDT datasheet, TSB43AB21APDT pinout, TSB43AB21APDT application, or TSB43AB21APDT equivalent, key selection considerations include its OHCI Release 1.1 compliance, 24.576-MHz crystal-referenced PLL architecture, 49.152-MHz LLC synchronization clock, D0–D3 power state support, and hardware-accelerated DV/MPEG timestamping for isochronous streams.
Technical Context
The TSB43AB21APDT integrates a PCI bus master interface with memory-mapped OHCI registers and a fully compliant 1394a PHY layer. Its internal architecture includes deep FIFOs for latency buffering, multiple isochronous transmit/receive contexts, and hardware-assisted CIP header stripping for DV streams per IEC 61883-1.
It implements TI-specific extensions including DV/MPEG timestamp insertion (OHCI offset A88h), link enhancement controls, and timestamp offset adjustment. The PHY uses differential TPA/TPB transceivers with 112-Ω external termination, 1.86-V TPBIAS bias generation, and automatic low-power entry on port inactivity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rates | S100/S200/S400 (100/200/400 Mbits/s) - enables real-time DV and MPEG transport over twisted-pair cable. |
| PCI Interface | 33-MHz, 32-bit, 5-V tolerant - compatible with legacy PCI slots and supports burst transfers up to 132 MB/s. |
| PHY Reference Clock | 24.576-MHz crystal or external clock - drives internal PLL generating 393.216-MHz reference and 49.152-MHz LLC sync clock. |
| Power States | D0/D1/D2/D3 per PCI PMI 1.1 - enables battery-aware suspend/resume in portable 1394 devices. |
| Isoc Contexts | Multiple independent transmit/receive contexts - allows concurrent streaming of audio, video, and timecode channels. |
| DV Timestamping | Hardware-inserted synchronization timestamps per IEC 61883-1 - eliminates CPU overhead for DV/MPEG stream alignment. |
| Port Count | Single 1394 port with TPA/TPB differential pairs - supports point-to-point or daisy-chain topology with automatic speed negotiation. |
Pinout & Package
TSB43AB21APDT is housed in a 128-pin LQFP (14 mm × 14 mm, 0.4 mm pitch) package with exposed thermal pad. Pin assignments are defined in Section 2 of SLLS521A, including dedicated PCI address/data/control lines, PHY differential I/O (TPA+/−, TPB+/−), TPBIAS, XI/XO, and GPIO terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AD[31:0] | PCI Address/Data Multiplexed Bus | Shared bidirectional 32-bit bus for configuration and data transfer; requires latch control via LALE. |
| TPA+, TPA− | Differential Strobe Transceiver Pair | Transmit encoded strobe / receive encoded data; terminated externally with 112-Ω network referenced to TPBIAS. |
| TPB+, TPB− | Differential Data Transceiver Pair | Transmit encoded data / receive encoded strobe; terminated to ground via 5 kΩ || 220 pF RC network. |
| TPBIAS | Twisted-Pair Bias Voltage Output | 1.86-V nominal source for remote connection detection; requires 1.0 µF external filter capacitor. |
| CLKIN | PCI Clock Input | Accepts 33-MHz PCI system clock; synchronous timing reference for all PCI interface operations. |
| INTA# | PCI Interrupt Request Output | Active-low, level-sensitive interrupt signal asserted per OHCI event mask settings (e.g., self-ID complete, packet error). |
Key Features
| Feature | Design Value |
|---|---|
| OHCI Release 1.1 Compliance | Fully implements memory-mapped register model and DMA engine behavior required for plug-and-play 1394 host operation under Windows and Linux. |
| SBP-2 Optimized PHY Path | Dedicated write-posting buffers and low-latency data path - reduces SCSI-over-1394 command-response delay in storage applications. |
| IEEE 1394a Arbitration Enhancements | Automatic speed negotiation and improved bus reset recovery - ensures robust multi-node topology handling in consumer AV equipment. |
| Hardware DV/MPEG Timestamp Insertion | Real-time CIP sync field generation without CPU intervention - preserves sub-frame timing accuracy in broadcast-grade video capture. |
| Ultralow-Power Sleep Mode | Disables PLLs and references while retaining TPBIAS monitoring - extends battery life in portable camcorder docks during idle periods. |
Applications
| Digital Video Capture | Professional Audio Interface |
|---|---|
Use Scenario: Real-time acquisition of DV-format video from camcorders into editing workstations via FireWire. IC Role / Device Role / Timing Role: OHCI-compliant host controller managing isochronous channel allocation, CIP header parsing, and timestamp insertion. Use Value: Hardware-accelerated DV timestamping ensures frame-accurate synchronization without CPU load or jitter-induced dropouts. |
Use Scenario: Low-latency multichannel audio streaming between digital mixers and PC-based DAWs. IC Role / Device Role / Timing Role: 1394a PHY/link-layer bridge with precise isochronous bandwidth reservation and fairness control. Use Value: Multiple independent isochronous contexts enable concurrent 24-bit/96-kHz audio streams with guaranteed bandwidth and cycle-accurate timing. |
| External Storage Enclosure | Industrial Machine Vision |
Use Scenario: High-throughput disk array connected via FireWire to embedded vision controllers. IC Role / Device Role / Timing Role: SBP-2-optimized host controller executing SCSI commands over 1394 with write-posting acceleration. Use Value: Physical write posting buffers reduce command latency by >30% versus software-only implementations, improving IOPS in RAID subsystems. |
Use Scenario: Synchronized image acquisition from multiple FireWire cameras in automated inspection systems. IC Role / Device Role / Timing Role: IEEE 1394a-compliant node controller enabling precise bus reset coordination and isochronous cycle timer synchronization. Use Value: Hardware-supported cycle timer register (OHCI offset 430h) allows sub-125-µs inter-camera trigger alignment across distributed nodes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 1394 host controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TSB43AB22APDT | Two-port 1394a OHCI controller with identical PHY/LLC architecture and register set; adds second TPA/TPB port and dual OHCI context engines. | Supports dual-cable topologies (e.g., camera + storage), but requires additional PCB routing and power budget. | Select when multi-device daisy-chaining or redundant port operation is required; otherwise TSB43AB21APDT offers lower BOM cost and footprint. |
| Lucent Technologies SYM1394-01 | Single-port OHCI controller with S100/S200 only; lacks IEEE 1394a arbitration enhancements, DV timestamping, and D3cold support. | Suitable for legacy DV capture where S400 and power management are not needed; no hardware CIP processing. | Choose for cost-sensitive, non-battery-powered applications with fixed S200 bandwidth requirements and minimal feature set. |
Compared with TSB43AB22APDT and SYM1394-01, the TSB43AB21APDT uniquely balances S400 performance, IEEE 1394a compliance, DV timestamping, and ultralow-power sleep - making it optimal for portable, high-fidelity video/audio host designs where single-port efficiency is prioritized.
Availability
TSB43AB21APDT is available at Aetrix Electronics and suitable for digital video capture cards, professional audio interfaces, and industrial machine vision systems requiring stable component supply and long-term lifecycle support.
Supply support for TSB43AB21APDT 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 leader specializing in analog, embedded processing, and connectivity solutions with broad industrial and automotive qualification.
The TSB43AB21APDT belongs to TI's 1394 Host Controller Solutions product line, designed specifically to enable robust, low-latency, standards-compliant FireWire connectivity in PC add-in cards and embedded host systems.
FAQ
What is the primary function of the TSB43AB21APDT in a system?
The TSB43AB21APDT serves as a PCI-based 1394a OHCI-compliant host controller, bridging the 33-MHz PCI bus to a single 1394 cable port. It handles physical layer signaling, link-layer protocol processing, OHCI register management, and hardware-accelerated isochronous streaming - enabling plug-and-play FireWire connectivity for video, audio, and storage peripherals. Its design centers on minimizing CPU overhead while maintaining strict IEEE 1394a-2000 compliance.
Does the TSB43AB21APDT support S400 (400 Mbits/s) operation?
Yes, the TSB43AB21APDT fully supports S400 data rate operation per IEEE 1394a-2000. It achieves this through its internal 393.216-MHz reference clock (derived from the 24.576-MHz crystal), which enables encoding and transmission of data-strobe streams at 393.216 Mbits/s on the TPB pair and corresponding strobe on the TPA pair. S400 mode is automatically negotiated during bus initialization based on cable and node capability detection.
How does the TSB43AB21APDT handle power management for battery-operated devices?
The TSB43AB21APDT implements full PCI Power Management Interface Specification (Revision 1.1) support across D0–D3 states. In D2/D3, it enters ultralow-power sleep mode when the port is inactive - disabling internal PLLs and current references while retaining TPBIAS monitoring. Wake-up occurs within 2 ms of setting the LPS bit (OHCI offset 50h/54h) or detecting cable events (connection/disconnection/bias presence), ensuring responsive yet energy-efficient operation in portable camcorder docks and field recorders.
What external components are required for proper TSB43AB21APDT PHY operation?
Required external components include: a 24.576-MHz crystal (or 24.576-MHz clock source) with recommended load capacitors; a 1.0 µF capacitor on TPBIAS; two 56-Ω resistors in series per differential pair (TPA and TPB), with the TPA midpoint tied to TPBIAS and the TPB midpoint grounded via 5 kΩ || 220 pF; and a 6.34 kΩ ±1% resistor between R0 and R1 to set driver output current. These ensure IEEE 1394 electrical compliance and stable bias voltage generation.
Can the TSB43AB21APDT be used in systems requiring IEC 61883-1-compliant DV streaming?
Yes, the TSB43AB21APDT provides hardware-level support for IEC 61883-1 Digital Interface Standard. Its TI Extension Register at OHCI offset A88h enables automatic insertion of synchronization timestamps into transmitted DV/MPEG streams and stripping of CIP headers from received DV packets. This offloads timing-critical processing from the host CPU, ensuring frame-accurate, jitter-free DV transport essential for broadcast and prosumer video workflows using the TSB43AB21APDT.
TSB43AB21APDT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 128-TQFP
- Programmable:
- Not Verified
- Protocol:
- IEEE 1394
- Function:
- Physical Layer Controller
- Interface:
- PCI
- Standards:
- IEEE 1394-1995, 1394a-2000, OHCI, Firewire™, i.Link™
- Voltage - Supply:
- 3.3V
- Current - Supply:
- -
- Operating Temperature:
- -
- Supplier Device Package:
- 128-TQFP (14x14)
- Grade:
- -
- Qualification:
- -
TSB43AB21APDT FAQ
1.How can I place an order for TSB43AB21APDT through Aetrix?
Please submit a Request for Quotation (RFQ) for TSB43AB21APDT 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 TSB43AB21APDT reliable?
The price and inventory of TSB43AB21APDT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TSB43AB21APDT is usually 5 days.
3.What payment methods are accepted for TSB43AB21APDT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TSB43AB21APDT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TSB43AB21APDT?
TSB43AB21APDT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TSB43AB21APDT 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 TSB43AB21APDT?
For technical support, including TSB43AB21APDT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TSB43AB21APDT requirements.
6.How does Aetrix verify that TSB43AB21APDT is sourced from the original manufacturer or authorized distributors?
All TSB43AB21APDT 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 TSB43AB21APDT meets industry standards.
7.What is the process for return or replacement of TSB43AB21APDT?
All TSB43AB21APDT units undergo pre-shipment inspection (PSI). If there is an issue with TSB43AB21APDT, 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 TSB43AB21APDT part is unused and in its original packaging.
Return procedure for TSB43AB21APDT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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