DP8392CV-1 - Coaxial Transceiver Interface (CTI) | Texas Instruments
部品番号: DP8392CV-1 ✗ 生産終了| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $18.5 | $18.50 |
| 10 | $16.2 | $162.00 |
| 100 | $13.85 | $1,385.00 |
| 500 | $11.4 | $5,700.00 |
| 1,000 | $9.75 | $9,750.00 |
DP8392CV-1 概要
A Coaxial Transceiver Interface (CTI) is a type of network transceiver IC that connects a Medium Access Controller (MAC) to a coaxial Ethernet bus, performing electrical line driving, signal recovery, collision detection (signal-quality error pulse generation), and jabber fault isolation. CTIs are a subset of physical-layer (PHY) transceivers that sit between the MAC block and the cable medium, and are descendants of early 10 Mb/s Ethernet silicon that pre-dated modern twisted-pair PHYs in the OSI model's physical layer of the network stack.
Key features of the DP8392CV-1 include a 10 Mb/s Manchester-encoded data rate, a single +5 V supply operation, integrated transmit/receive path switching, integrated SQE (Signal Quality Error) test pulse generation, a built-in jabber timer with automatic transmitter disable after the maximum packet time, and a TTL/CMOS-compatible interface to the DP8390 NIC and DP8391 encoder/decoder devices. The 28-PLCC pinout uses J-bend surface-mount leads and is organized for direct cable-side and digital-side pin groups to simplify PCB layout.
The architecture uses a bipolar driver for the coaxial interface with separate transmit and receive amplifiers, a 10 MHz fundamental oscillator with external clock-reference support, and an analog collision-detection comparator that produces the standard heart-beat pulse during inter-packet gaps. The on-chip jabber latch disables the transmitter if a continuous transmit exceeds the packet-time threshold, protecting the coax segment from stuck-node faults. Commercial-grade temperature range (0C to +70C) targets office and lab Ethernet environments.
Typical applications include 10BASE2 (Thin Ethernet / Cheapernet) network interface cards, 10BASE5 (Thick Ethernet) AUI-to-coax converter adapters, legacy industrial Ethernet backbones on coax, and embedded systems that require an IEEE 802.3 coax link to communicate with vintage networking equipment or to bridge older industrial fieldbus hardware. The part also sees use in test equipment that emulates a coax segment endpoint.
When designing with this device, observe AC termination and DC bias requirements specified in the datasheet typical application - a 1:1 pulse transformer on the Tx/Rx line and external pull-up/pull-down resistors on collision and receive-data lines. Decoupling should keep the +5 V supply near the analog VCC pins with both bulk and 0.1 uF ceramic capacitors to prevent noise from coupling into the receive path.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
ドロップイン代替品: DP8392CV-1 — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: DP8392CV-1 （同一形状・フットプリント） — 相違点: Package.
クイック比較ツール — 並列比較する代替部品を選択:
DP8392CV
✅ ドロップイン📋 参考代替品（カタログ未掲載）
SN8392C
✅ ドロップイン📋 参考代替品（カタログ未掲載）
DP8392CT
✅ ドロップイン📋 参考代替品（カタログ未掲載）
Am7992JC
✅ ドロップイン📋 参考代替品（カタログ未掲載）
DP8392CV-1 仕様
| 機能 | Coaxial Transceiver Interface (CTI) |
| Standard | IEEE 802.3 (Ethernet 10BASE2/10BASE5) |
| データレート | 10 Mb/s (Manchester encoded) |
| Supply Voltage (VCC) | +5 V (typical) |
| パッケージ | 28-PLCC (V28A, J-lead, 11.51 x 11.51 mm) |
| 実装タイプ | Surface Mount |
| 動作温度 | 0C to +70C (commercial) |
| Transmit Path | Integrated line driver with jabber timer |
| Receive Path | Integrated receive amplifier with carrier detect |
| Collision Detection | On-chip SQE/heart-beat generator |
| Jabber Timer | Automatic transmitter disable on stuck-node fault |
| Companion ICs | DP8390 (NIC), DP8391 (ENDEC) |
| Serial Interface | TTL/CMOS-compatible to DP8390/DP8391 |
| Terminal Form | J-BEND (per Partstack cross-reference) |
| Package Code | QCCJ / SQUARE (per Partstack cross-reference) |
| Number of Terminals | 28 |
DP8392CV-1 qccj / square (per partstack cross-reference) ピン配置ガイド
DP8392CV-1 (qccj / square (per partstack cross-reference) パッケージ) のピン配置。 ピン番号、機能、接続図はメーカーのデータシートで定義されています。正確なフットプリントとはんだ付けのガイドラインについては、データシートを参照してください。
詳細なピン配置データはありません: DP8392CV-1.
詳細は データシート をご参照ください。
主な用途
DP8392CV-1 の用途: 6 件s: 10BASE2 Thin Ethernet NIC, 10BASE5 Thick Ethernet AUI-to-Coax Adapter, Legacy Industrial Ethernet Backbone, Test Equipment Coax Endpoint Emulator, Vintage Ethernet Workstation Recapitalization, Coax-to-Twisted-Pair Bridge Hardware.
10BASE2 Thin Ethernet NIC
The DP8392CV-1 sits between a BNC-T coax segment and the DP8390 NIC + DP8391 ENDEC chipset in a 10BASE2 (Thin Ethernet / Cheapernet) ISA-bus network interface card. Its integrated line driver delivers the +/- 1 V Manchester signal to the coax bus via an external 1:1 pulse transformer, while the integrated SQE heart-beat generator produces the mandated collision pulse after every transmitted packet. The on-chip jabber timer disables the transmitter if the link stays active beyond the maximum packet time, protecting the coax segment from stuck-node faults. Use the DP8392CV-1 with 50 ohm coax terminations and a 50 ohm BNC-T at every node for proper signal integrity on the shared segment.
おすすめ
10BASE5 Thick Ethernet AUI-to-Coax Adapter
In a 10BASE5 AUI-to-coax adapter, the DP8392CV-1 provides the coax-side transceiver when only AUI drop cables are available on the legacy Thick Ethernet backbone. The CTI's transmit and receive paths interface to the coax segment through the standard pulse transformer (Pulse Engineering 64103 or equivalent) and surface-mount BNC connector. The SQE heart-beat output is propagated to the AUI DI pair so that the connected station receives the standard collision-indication pulse after every transmission. Use the DP8392CV-1 with a heavy 50 ohm drop cable and vampire tap termination to preserve signal quality across long backbone segments.
おすすめ
Legacy Industrial Ethernet Backbone
In legacy industrial plant networks, the DP8392CV-1 is used to bridge PLC controllers and SCADA hosts running over already-installed 10BASE2 coax backbones, because repealing and rewiring the cable plant is often cost-prohibitive. The CTI's commercial 0C to +70C operating range suits indoor control cabinets and PLC racks, while its integrated jabber timer and collision detection preserve network behavior when a station misbehaves. Deploy the DP8392CV-1 at each coax drop inside a controlled industrial enclosure with adequate 50 ohm termination at the cable ends to maintain IEEE 802.3 signaling.
おすすめ
Test Equipment Coax Endpoint Emulator
The DP8392CV-1 is used in IEEE 802.3 test fixtures that emulate a 10BASE2 coax segment endpoint for compliance and interoperability testing of NICs and bridges. The CTI's standard transmit, receive, collision, and jabber behavior let the instrument reproduce real coax-bus activity while presenting a controlled electrical load to the device under test. The integrated SQE pulse generator and jabber timer allow the fixture to test that a DUT correctly responds to collision and stuck-node conditions per the IEEE 802.3 specification. Use the DP8392CV-1 with a known-good 50 ohm termination and the standard 1:1 pulse transformer for repeatable measurements.
おすすめ
Vintage Ethernet Workstation Recapitalization
In recapitalization of vintage 1980s/1990s UNIX workstations and DEC VAX stations that retain their original coax Ethernet interfaces, the DP8392CV-1 replaces failed CTIs on legacy NICs without requiring PCB redesign. Because the 28-PLCC V28A footprint matches the original DP8392CV socket, maintenance technicians can swap in a DP8392CV-1 during repairs and retain the original chipset design. The CTI's commercial temperature grade (0C to +70C) is suitable for indoor office equipment environments. Combine the DP8392CV-1 with the original companion DP8390/DP8391 ICs to bring a vintage workstation's coax link back to operational readiness.
おすすめ
Coax-to-Twisted-Pair Bridge Hardware
In coax-to-twisted-pair Ethernet media converters (10BASE2/10BASE5 to 10BASE-T), the DP8392CV-1 provides the legacy coax-side physical interface while a separate 10BASE-T PHY handles the RJ45 side, with an FPGA or microcontroller bridging the MAC. The CTI's integrated line driver, receive path, and SQE generator produce all of the standard coax-side electrical behavior required by IEEE 802.3, leaving only Manchester conversion to be done by the companion DP8391 ENDEC. The bridge lets modern twisted-pair equipment communicate with legacy 10BASE2/10BASE5 network segments without rewiring the coax plant. Use the DP8392CV-1 with a pulse transformer and proper 50 ohm termination to maintain signal integrity at the coax port.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: DP8392CV-1 — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | DP8392CV | SN8392C | DP8392CT | Am7992JC |
|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments (NS heritage) | Texas Instruments | Texas Instruments (AMD heritage) |
| Package | 28-PLCC (V28A) | 28-PLCC (V28A) - same | 28-PLCC (V28A) - same | 28-PLCC (V28A) - same | 28-PLCC (V28A) - same |
| Function | Coaxial Transceiver Interface (CTI) | Coaxial Transceiver Interface (CTI) | Coaxial Transceiver Interface (CTI) | Coaxial Transceiver Interface (CTI) | Coaxial Transceiver Interface (CTI) |
| Data Rate | 10 Mb/s | 10 Mb/s | 10 Mb/s | 10 Mb/s | 10 Mb/s |
| Supply Voltage | +5 V | +5 V | +5 V | +5 V | +5 V |
| Operating Temperature | 0C to +70C (commercial) | 0C to +70C | 0C to +70C | 0C to +70C | 0C to +70C |
| Datasheet Revision | TL/F/11085-1 | TL/F/11085 | Same doc | Same doc | Am7992 datasheet |
| Lifecycle Status | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete |
| Companion ICs | DP8390 + DP8391 | DP8390 + DP8391 | DP8390 + DP8391 | DP8390 + DP8391 | Am7990 + Am7991 |
主な差別化要因
- Integrated SQE heart-beat and jabber timer in one chip （vs Discrete coax transceiver designs of the era)
- 28-PLCC surface-mount footprint compatible with automated assembly （vs DP8392CN (16-pin DIP through-hole))
- Companion to the industry-standard DP8390/DP8391 chipset （vs Standalone coax transceivers)
設計ノート
Always install the standard 1:1 pulse transformer (Pulse Engineering 64103 or Valor LT6003 or equivalent, Le >= 100 uH) on the coax-side interface as shown in TL/F/11085 Figure 4 - omitting this transformer or substituting a non-isolated DC-coupled circuit will fail IEEE 802.3 compliance and allow ground loops between networked stations. Add proper 50 ohm termination at every BNC-T to absorb reflections on the shared coax segment.
Decouple the analog and digital VCC pins separately with bulk and 0.1 uF ceramic capacitors placed as close as possible to each VCC pin to keep the receive-path noise floor low. The receiver amplifier in the DP8392CV-1 has only 10 MHz of useful bandwidth but is sensitive to noise from switching supplies; keep the +5 V rail clean or use a linear regulator. Estimated: at 10 Mb/s Manchester full-duplex load, total current draw is ~250 mA from the +5 V rail, so a 1 A LDO headroom is recommended.
For the 28-PLCC (V28A) J-lead package, use a 1.27 mm pitch footprint with proper thermal relief on all ground pads and trace width >= 0.3 mm on all coax-side signal traces. Keep TX and RX pairs routed as 50 ohm controlled-impedance traces between the IC pins and the pulse transformer. Place the BNC connector and 50 ohm termination network within 50 mm of the pulse transformer to minimize stub length and signal loss. Per the datasheet typical application, add external pull-up/pull-down resistors on collision, receive-data, and oscillator pins to set proper biasing when the companion DP8390/DP8391 devices are reset.
The DP8392CV-1 uses a 10 MHz fundamental oscillator and an on-chip Manchester decoder; sensitive analog signals are placed on the coax side of the die. Keep digital CMOS signal traces (DO+, DO-, RCLK, TCLK) physically separated from the coax-side analog traces on the PCB, and use a ground guard trace between them. Place a ferrite bead on the +5 V supply rail near the IC if supply noise exceeds ~50 mVpp; the receiver sensitivity is approximately +/- 500 mV threshold, so supply ripple must stay well below this level to avoid false carrier detection.
The 28-PLCC V28A package has a typical theta_JA of approximately 45 C/W in still air, so under a 1 W load the junction temperature rise is ~45C above ambient. At full operation on the 0C to +70C commercial range, this leaves sufficient thermal margin in a standard plastic-enclosed NIC or adapter card. In enclosed repeater or bridge housings above 50C ambient, add a copper pour under the exposed package bottom or a small clip-on heatsink to keep Tj below 125C. The CTI does not generate significant heat under normal 10 Mb/s half-duplex operation, but continuous jabber-fault duty cycling can raise internal dissipation.
コンプライアンス情報
Compliance data not provided in the verified web data; DP8392CV-1 is an obsolete 1990s-era commercial-grade interface IC. The 28-PLCC V28A package traditionally used lead-tin or lead-free plating per the manufacturer's era-of-production, but the official RoHS / REACH status was not present in the Verified Web Data extracted at 2026-10-22 and so is marked unknown.
