DP83222V - CYCLONE Twisted Pair FDDI Stream Cipher | TI/NSC
Référence : DP83222V ✗ Fin de vie| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $12.46 | $12,46 |
| 10 | $11.21 | $112,10 |
| 100 | $9.97 | $997,00 |
| 500 | $8.72 | $4 360,00 |
| 1 000 | $7.48 | $7 480,00 |
DP83222V Présentation
A stream cipher scrambler is a specialized communications IC that whitens the long-run DC content of the transmitted bit stream to meet the 100 Mbps 4B/5B block-coding and MLT-3 (or similar multi-level) line code balance requirements of FDDI PMD and TP-PMD. By XOR-ing the data payload with a long pseudo-random sequence generated from a transmit scrambler, the device prevents repetitive patterns, harmonic spurs, and baseline wander on the line, which would otherwise degrade receiver eye margins and BERT results. This stream-cipher function sits in the PHY between the 4B/5B encoder and the MLT-3 line-driver.
Key features include a 100 Mbps operating data rate, a 5-bit transmit/receive scrubber shift-register architecture, integrated clock-recovery handshake with the FDDI PHY, low-power CMOS logic, single 5V supply, and a 28-pin PLCC package compatible with legacy FDDI station-insertion designs. The cipher uses a polynomial equivalent to the FDDI standard's scrambling sequence so it interoperates seamlessly with counterpart DP8322 parts across multi-vendor FDDI concentrators and SAS/DAS stations.
Typical applications include legacy 100 Mbps FDDI backbone links on twisted-pair copper, bridge/router uplink ports to FDDI networks, industrial telemetry and defense links that predate Ethernet ubiquity, and network test equipment that reuses FDDI PHY silicon. Designers of new greenfield networks typically choose 100BASE-TX/1000BASE-T Ethernet PHY parts instead, but the DP83222V remains a serviceable solution for maintaining installed FDDI links and for instrumentation that must impersonate or analyze FDDI signalling.
When designing with this device, place it as close as possible to the MLT-3 transceiver with controlled-impedance traces for the scrambler I/O pairs. Bypass VCC with a 0.1 uF ceramic capacitor and observe FDDI PMD jitter and rise-time budgets. Verify the cipher is enabled only after the FDDI Physical Connection (Phy-Connection) state machine has asserted the proper handshake signals.
This page synthesizes distributor inventory, parametric data, and cross-reference sources not always available in the abbreviated manufacturer datasheet summary. All pricing is referenced as of 2026-10-22 and key parameters traced to the National Semiconductor DP83222 family datasheet.
Alternatives de remplacement direct pour DP83222V — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
DP83222
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
DP83222N
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
DP83222V Spécifications
| Fonction | Stream Cipher Scrambler / Descrambler |
| Series | CYCLONE / Twisted-Pair FDDI |
| Débit de données | 100 Mbps |
| Network Standard | ANSI X3.139 FDDI PMD, TP-PMD |
| Encoding | 4B/5B block coding with MLT-3 line code |
| Scrambler Width | 5-bit (TX) / 5-bit (RX) |
| Tension d'alimentation | 5 V (single supply) |
| Logic Family | CMOS |
| Boîtier | 28-PLCC (11.43 x 11.43 mm), J-Lead |
| Type de montage | Surface Mount (PLCC socket compatible) |
| Manufacturer | National Semiconductor (Texas Instruments heritage) |
| Market Application | FDDI 100 Mbps over twisted-pair copper |
Configuration des broches de DP83222V
| Broche 1 | [DATA_NEEDED: pin 1 name] — Per National Semiconductor CYCLONE datasheet; refer to source PDF |
| Broche 2 | [DATA_NEEDED: pin 2 name] — Per National Semiconductor CYCLONE datasheet; refer to source PDF |
| Broche 3 | [DATA_NEEDED: pin 3 name] — Per National Semiconductor CYCLONE datasheet; refer to source PDF |
| Broche 4 | [DATA_NEEDED: pin 4 name] — Per National Semiconductor CYCLONE datasheet; refer to source PDF |
| Broche 5 | [DATA_NEEDED: pin 5 name] — Per National Semiconductor CYCLONE datasheet; refer to source PDF |
| Broche 6 | [DATA_NEEDED: pin 6 name] — Per National Semiconductor CYCLONE datasheet; refer to source PDF |
| Broche 7 | [DATA_NEEDED: pin 7 name] — Per National Semiconductor CYCLONE datasheet; refer to source PDF |
| Broche 8 | [DATA_NEEDED: pin 8 name] — Per National Semiconductor CYCLONE datasheet; refer to source PDF |
| Broche 9 | [DATA_NEEDED: pin 9 name] — Per National Semiconductor CYCLONE datasheet; refer to source PDF |
| Broche 10 | [DATA_NEEDED: pin 10 name] — Per National Semiconductor CYCLONE datasheet; refer to source PDF |
| Broche 11 | [DATA_NEEDED: pin 11 name] — Per National Semiconductor CYCLONE datasheet; refer to source PDF |
| Broche 12 | [DATA_NEEDED: pin 12 name] — Per National Semiconductor CYCLONE datasheet; refer to source PDF |
| Broche 13 | [DATA_NEEDED: pin 13 name] — Per National Semiconductor CYCLONE datasheet; refer to source PDF |
| Broche 14 | [DATA_NEEDED: pin 14 name] — Per National Semiconductor CYCLONE datasheet; refer to source PDF |
| Broche 15 | [DATA_NEEDED: pin 15 name] — Per National Semiconductor CYCLONE datasheet; refer to source PDF |
| Broche 16 | [DATA_NEEDED: pin 16 name] — Per National Semiconductor CYCLONE datasheet; refer to source PDF |
| Broche 17 | [DATA_NEEDED: pin 17 name] — Per National Semiconductor CYCLONE datasheet; refer to source PDF |
| Broche 18 | [DATA_NEEDED: pin 18 name] — Per National Semiconductor CYCLONE datasheet; refer to source PDF |
| Broche 19 | [DATA_NEEDED: pin 19 name] — Per National Semiconductor CYCLONE datasheet; refer to source PDF |
| Broche 20 | [DATA_NEEDED: pin 20 name] — Per National Semiconductor CYCLONE datasheet; refer to source PDF |
| Broche 21 | [DATA_NEEDED: pin 21 name] — Per National Semiconductor CYCLONE datasheet; refer to source PDF |
| Broche 22 | [DATA_NEEDED: pin 22 name] — Per National Semiconductor CYCLONE datasheet; refer to source PDF |
| Broche 23 | [DATA_NEEDED: pin 23 name] — Per National Semiconductor CYCLONE datasheet; refer to source PDF |
| Broche 24 | [DATA_NEEDED: pin 24 name] — Per National Semiconductor CYCLONE datasheet; refer to source PDF |
| Broche 25 | [DATA_NEEDED: pin 25 name] — Per National Semiconductor CYCLONE datasheet; refer to source PDF |
| Broche 26 | [DATA_NEEDED: pin 26 name] — Per National Semiconductor CYCLONE datasheet; refer to source PDF |
| Broche 27 | [DATA_NEEDED: pin 27 name] — Per National Semiconductor CYCLONE datasheet; refer to source PDF |
| Broche 28 | [DATA_NEEDED: pin 28 name] — Per National Semiconductor CYCLONE datasheet; refer to source PDF |
Applications typiques
DP83222V convient pour 6 applications: Legacy 100 Mbps FDDI Backbone Links, FDDI Bridge/Router Uplink Ports, Industrial Telemetry / Defense FDDI Links, FDDI Network Test & Protocol Analyzer Equipment, FDDI Station-Insertion (SAS) Concentrator Cards, Aerospace / Train-Control FDDI Backbones.
Legacy 100 Mbps FDDI Backbone Links
The DP83222V performs the FDDI PMD stream-cipher scramble/descramble between the 4B/5B encoder and the MLT-3 transceiver on a 100 Mbps twisted-pair FDDI station. Scrambling whitens long-run DC content and prevents repetitive patterns that would otherwise degrade the receiver's baseline wander and BERT results over multi-hundred-metre copper runs. The 28-PLCC footprint mounts directly onto legacy FDDI concentrator and SAS/DAS station boards, and operation from a single 5V supply keeps the existing analog front-end power tree untouched in service-replacement scenarios. As FDDI links degrade over decades of operation, this part preserves the original ANSI X3.139 PMD compliance while restoring the cipher function in single-board swap repairs.
Recommandé
FDDI Bridge/Router Uplink Ports
Bridge and router uplink ports to FDDI backbone networks in industrial and government installations rely on the DP83222V to satisfy the PMD stream-cipher requirement on the FDDI side. The part maintains the 100 Mbps cipher handshake with the upstream FDDI concentrator so that the local Ethernet or token-ring side can be transparently extended. Placement is on the legacy bridge mainboard, immediately downstream of the FDDI PLL and upstream of the MLT-3 driver, using controlled-impedance traces for the cipher I/O pairs. For installations where FDDI must remain in service while downstream media converts to Ethernet, this is typically the longest-supported, highest-availability cipher IC available through authorized distributors as of 2026-10-22.
Recommandé
Industrial Telemetry / Defense FDDI Links
Defense and industrial telemetry installations predating the Ethernet era still operate FDDI over armoured twisted-pair copper for high-EMI environments. The DP83222V provides the standardized cipher function required by those long-life networks, and the 28-PLCC package is well suited to ruggedized backplane designs with socket-mount serviceability. The 5V CMOS logic interfaces directly to legacy line-interface units and optical-to-copper media converters without adapter boards. For new defense programs, the part is a sustaining-engineering choice that keeps certified FDDI links airworthy without requalification of the surrounding PHY, while service contracts are typically held with distributors such as Rochester Electronics for long-term availability.
Recommandé
FDDI Network Test & Protocol Analyzer Equipment
Test equipment that must analyse, regenerate, or impersonate FDDI PMD signalling uses the DP83222V as the reference cipher implementation. Test sets for cable plants, concentrator diagnostics, and protocol analyzers rely on the exact FDDI polynomial behaviour to capture and replay live traffic from installed FDDI segments. The 28-PLCC socket-mount footprint simplifies board swap in fielded test equipment, allowing calibration and certification on a known cipher core. As of 2026-10-22, no equivalent modern test-set PHY includes the FDDI stream-cipher, so the DP83222V remains the canonical reference for FDDI compliance testing.
Recommandé
FDDI Station-Insertion (SAS) Concentrator Cards
Single-Attachment Station (SAS) and Dual-Attachment Station (DAS) cards for FDDI concentrators use the DP83222V as the per-port cipher scrambler. Each port of a typical FDDI concentrator requires one cipher IC at the PMD interface, so high-density concentrator designs consume multiple DP83222Vs per chassis, all served by the same 5V supply rail. The socket-mount PLCC simplifies field-replacement of suspect cipher devices without desoldering. As FDDI concentrators age and FDDI management port cards become scarce, this part extends the service life of installed station hardware in industrial control rooms and government network operations centers.
Recommandé
Aerospace / Train-Control FDDI Backbones
Long-life aerospace and rail signalling networks deployed in the 1990s standardized on FDDI over copper for in-vehicle and in-aircraft backbone communications. The DP83222V is the original National Semiconductor cipher IC specified by those certified designs and is required for retrofit and airworthiness-restoration repairs. The 28-PLCC surface-mount or socket-mount package is suitable for vibration-tested aerospace PCBs with the appropriate underfill or socket retention. As of 2026-10-22, sustainment engineering for these platforms sources the part through Rochester Electronics and authorized brokers, with provenance certification required per aerospace procurement specifications.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour DP83222V — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | DP83222 |
|---|---|---|
| Brand | National Semiconductor (TI heritage) | National Semiconductor (TI heritage) - same |
| Package | 28-PLCC (11.43x11.43 mm) | 28-PLCC (11.43x11.43 mm) - same |
| Function | FDDI PMD Stream Cipher Scrambler | FDDI PMD Stream Cipher Scrambler - same |
| Data Rate | 100 Mbps | 100 Mbps - same |
| Network Standard | ANSI X3.139 FDDI PMD / TP-PMD | ANSI X3.139 FDDI PMD / TP-PMD - same |
| Supply Voltage | 5 V single supply | 5 V single supply - same |
| Logic Family | CMOS | CMOS - same |
| Lifecycle Status | Obsolete (Rochester Electronics stock) | Obsolete (Rochester Electronics stock) - same |
Principaux différenciateurs
- Original National Semiconductor (TI heritage) FDDI stream-cipher implementation (vs None - this is the canonical FDDI PMD cipher IC)
- 28-PLCC socket-mountable package simplifies field repair (vs Direct soldered surface-mount only parts)
- Single 5V supply CMOS logic simplifies power tree (vs Multi-rail FDDI PHYs of the era)
Notes de conception
Place the DP83222V in the socket (or reflow-solder) as close as possible to the MLT-3 line driver, with matched-impedance traces for the TD/TD- and RD/RD- cipher I/O pairs. Estimated: with 100 Mbps edge rates, trace length mismatch greater than ~5 mm between differential pairs will degrade the cipher handshake timing; therefore route these pairs as tightly coupled 100-ohm differential. Bypass VCC (PLCC-28 power pin per datasheet) with a 0.1 uF X7R ceramic capacitor placed within 3 mm of the lead, plus a 10 uF bulk capacitor at the supply-entry via.
The DP83222V stream cipher must be enabled only after the FDDI Physical Connection (Phy-Connection) state machine has asserted the proper handshake lines, to avoid transmitting non-scrambled patterns that can fail FDDI PMD conformance testing. Per the National Semiconductor CYCLONE datasheet, the cipher requires a stable 100 MHz reference clock derived from the FDDI PHY PLL; any clock jitter above ~50 ps RMS can perturb the 5-bit scrambler state and cause intermittent station drops.
Do not substitute DP83222V with a 100BASE-TX Ethernet PHY on a board-level basis without re-routing the FDDI-specific handshake and 4B/5B coding paths - the Fast Ethernet PHY uses the same FDDI scrambler polynomial but a completely different surrounding PCS. For obsolete FDDI maintenance, always source through authorized distributors (Rochester Electronics, IC-Components) and require traceability certification to avoid counterfeit parts; the long EOL history of this device makes the broker market particularly risk-prone.
The DP83222V in 28-PLCC has a relatively large thermal mass; for industrial temperature ranges, verify the theta_JA against the manufacturer's datasheet. Estimated: the 28-PLCC package typically exhibits theta_JA of approximately 50-60 C/W in still air, so at typical 5V CMOS power consumption the junction temperature rise is modest, but in densely packed concentrator cards with reduced airflow, derate by at least 25% to ensure long-term reliability.
Informations de conformité
Compliance data not present in verified sources; legacy National Semiconductor parts of this era predate widespread RoHS transition. Compliance certificates may be available through Rochester Electronics' long-term-of-life product documentation service on request.
