DP83910AN - CMOS Serial Network Interface 24-DIP | National Semiconductor
MPN： DP83910AN ✗ 停產DP83910AN 概覽
A Serial Network Interface (SNI) is a category of interface IC that sits between the Ethernet coaxial transceiver and the system controller, performing Manchester encoding, clock recovery, jabber monitoring, and link-integrity signalling per the IEEE 802.3 physical-layer specification. Within the broader hierarchy, the DP83910AN belongs to the network interface IC family, which falls under interface ICs, then integrated circuits, then semiconductors, providing OSI layer-1 connectivity and isolating the host CPU from line-coding analogue details.
Key features include 10 Mb/s Manchester encoding/decoding, integrated jabber detection and Link Test generation, CMOS low-power operation versus the original bipolar DP8391, and a wide supply tolerance of 4.75 V to 5.25 V. The 24-DIP through-hole package supports easy insertion into legacy Ethernet adapter boards and industrial retrofit designs, while the CMOS process reduces typical operating current compared to its bipolar predecessor. The device also provides collision-detection and carrier-sense signalling flags that flow into the upper-layer MAC controller.
Architecturally, the DP83910AN combines a phase-locked loop (PLL) for receive clock recovery, a 10 MHz oscillator interface, transmit clock-generation logic, and differential Manchester encode/decode blocks. Because the silicon is a drop-in CMOS replacement for the DP8391, existing schematic layouts can accept the DP83910AN without board rework, a critical advantage for legacy industrial networks and instrumentation that depend on the older part.
Typical applications include 10BASE2 / 10BASE5 Ethernet adapter cards, industrial SCADA controllers, legacy factory-floor networking interfaces, and embedded instrumentation that must communicate over IEEE 802.3 media. The DP83910AN is also commonly used by restoration projects for early-1990s networking hardware and by test equipment vendors supporting IEEE 802.3 physical-layer compliance.
When designing with this device, note that the DP83910AN is now in obsolete/EOL lifecycle, so long-term sourcing requires attention to authorized distributor stock and the qualified cross-references listed in the alternatives section. Decoupling with 0.1 uF ceramic capacitors close to VCC/GND pins is essential for the integrated PLL to maintain stable clock recovery under varying line loading.
This page synthesizes distributor pricing from DigiKey and Win Source, drops-in cross-reference data, lifecycle risk analysis, and Pin Configuration design notes that go beyond what the original manufacturer datasheet provides as of October 22, 2026.
直接替換替代品，適用於 DP83910AN — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： DP83910AN （相同外形與佔位） — 差異在於 Manufacturer, Mounting Type, Package, Pin Count, Product Type.
DP83910AV/NOPB
✅ 直接替換📋 參考替代品（不在目錄中）
DP8391N
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
DP83910AN 規格
| Part Number | DP83910AN |
| Manufacturer | Texas Instruments (formerly National Semiconductor) |
| Description | CMOS Serial Network Interface (SNI) - Manchester encoder/decoder |
| Product Type | Ethernet Network Interface IC (SNI) |
| 供應電壓 | 4.75 V to 5.25 V |
| Network Standard | IEEE 802.3 Ethernet (10 Mb/s Manchester) |
| 資料速率 | 10 Mb/s |
| Encoding | Manchester encode / decode |
| Process Technology | CMOS (direct replacement for bipolar DP8391) |
| 封裝 | 24-DIP, 0.300 inch (7.62 mm) row spacing |
| 安裝類型 | Through-Hole |
| 腳位數 | 24 |
| Packaging | Tube |
| Lead Status | Contains Lead (non-RoHS in original spec) |
| Applications | Ethernet Network Interface - 10BASE2 / 10BASE5 SNI |
| Lifecycle | Obsolete - EOL |
DP83910AN 腳位配置
| 腳位 1 | RX+ — Receive differential input (positive) |
| 腳位 2 | RX- — Receive differential input (negative) |
| 腳位 3 | RCLK — Recovered receive clock output |
| 腳位 4 | TCLK — Transmit clock output |
| 腳位 5 | CDT — Collision detect transmit input |
| 腳位 6 | CDR — Collision detect receive output |
| 腳位 7 | CRS — Carrier sense output |
| 腳位 8 | RXD — Receive decoded data output |
| 腳位 9 | NC — Not connected (per datasheet) |
| 腳位 10 | TXD — Transmit data input |
| 腳位 11 | TX+ — Transmit differential output (positive) |
| 腳位 12 | GND — Ground |
| 腳位 13 | TX- — Transmit differential output (negative) |
| 腳位 14 | VCC — +5 V supply |
| 腳位 15 | NC — Not connected (per datasheet) |
| 腳位 16 | X1 — Crystal oscillator input (10 MHz) |
| 腳位 17 | X2 — Crystal oscillator output (10 MHz) |
| 腳位 18 | TEST — Test mode enable (active high) |
| 腳位 19 | RESET — Reset input (active high) |
| 腳位 20 | JAB — Jabber timer output |
| 腳位 21 | LT — Link test pulse output |
| 腳位 22 | TXEN — Transmit enable input |
| 腳位 23 | RXEN — Receive enable input |
| 腳位 24 | VCC — +5 V supply (secondary) |
典型應用
DP83910AN 適用於 6 應用s: 10BASE2 / 10BASE5 Ethernet Adapter Cards, Industrial SCADA / Factory Network Controllers, Legacy Network Hardware Restoration, IEEE 802.3 Physical-Layer Test Equipment, Embedded Instrumentation Communication Interfaces, Educational 802.3 Network Lab Kits.
10BASE2 / 10BASE5 Ethernet Adapter Cards
The DP83910AN is the controller-side companion to a coax transceiver such as the DP8392 in legacy 10 Mb/s Ethernet adapter cards. With a 4.75 V to 5.25 V supply and 10 Mb/s Manchester encode/decode, it provides clock recovery, jabber detection, and link-test signalling required by IEEE 802.3. Direct CMOS replacement for the bipolar DP8391 keeps board rework zero for retrofit designs.
推薦
Industrial SCADA / Factory Network Controllers
Long-life industrial SCADA controllers and CNC automation rely on 10 Mb/s 802.3 for plant-floor networking, and the DP83910AN's mature CMOS SNI design is qualified for decades of field operation. The 24-DIP through-hole package survives high-vibration assembly where fine-pitch PLCC would risk cracked solder joints. Combined with a DP8392 coax transceiver it forms a complete, robust serial network.
推薦
Legacy Network Hardware Restoration
Vintage networking routers, bridges, and terminal-server repairs frequently require an exact-match 24-DIP SNI; the DP83910AN provides the modern CMOS equivalent of the original bipolar part, reducing operating heat and extending MTBF in restored gear. Designers can use the DP83910AN to replace a failed DP8391 with no layout change. This preserves expensive legacy enclosures and backplane wiring.
推薦
IEEE 802.3 Physical-Layer Test Equipment
Test-and-measurement vendors build IEEE 802.3 physical-layer compliance fixtures using reference SNI devices; the DP83910AN's CMOS process provides predictable loopback behaviour and jabber timing for golden-unit baselines. Its 4.75 V to 5.25 V supply range matches bench-top +5V power rails without extra regulation. Engineers can pair it with the DP8392 to emulate a complete cable-end interface.
推薦
Embedded Instrumentation Communication Interfaces
Embedded instrumentation that needs 10 Mb/s Ethernet transport to a host (for example, protocol analyzers or 1990s-vintage logic analyzers) can use the DP83910AN as the SNI between on-board digital logic and a coax transceiver. The CMOS construction reduces the +5V rail load versus the original bipolar DP8391, allowing tighter power budgets in compact instrumentation. With the correct DP8392 companion, the system transmits full IEEE 802.3 frames.
推薦
Educational 802.3 Network Lab Kits
University networking laboratories that teach the IEEE 802.3 physical-layer can use the DP83910AN with the DP8392 coax transceiver to demonstrate Manchester encoding, CSMA/CD collision detection, and link-test pulse generation. Its 24-DIP package is easier for students to breadboard than fine-pitch alternatives. Combined with a +5V supply and discrete LEDs, instructors can visualize each layer-1 signal in real time.
推薦
推薦產品摘要
工程參考資料，適用於 DP83910AN — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | DP83910AV/NOPB | DP8391N | DP83910AV |
|---|---|---|---|---|
| Package | 24-DIP (through-hole) | 28-PLCC - DIFFERENT | 24-DIP (through-hole) - same | 28-PLCC - DIFFERENT |
| Brand | Texas Instruments (formerly National Semiconductor) | Texas Instruments | Texas Instruments | Texas Instruments |
| Supply Voltage | 4.75 V to 5.25 V | 4.75 V to 5.25 V | 4.75 V to 5.25 V (bipolar) | 4.75 V to 5.25 V |
| Process Technology | CMOS | CMOS | Bipolar | CMOS |
| Data Rate | 10 Mb/s | 10 Mb/s | 10 Mb/s | 10 Mb/s |
| Encoding | Manchester | Manchester | Manchester | Manchester |
| Lifecycle | Obsolete / EOL | Obsolete / EOL | Obsolete / EOL | Obsolete / EOL |
| Mounting Type | Through-Hole | Surface Mount | Through-Hole | Surface Mount |
主要差異化特點
- CMOS low-power replacement for the original bipolar DP8391 SNI (對比DP8391N)
- Through-hole DIP for retrofit and lab work (對比DP83910AV/NOPB)
- Established dual-source design family (對比DP83910AV)
設計說明
The DP83910AN operates from a single +5 V (4.75 V to 5.25 V) supply and requires local 0.1 uF ceramic decoupling close to each VCC pin (pins 14 and 24 on the 24-DIP) to keep the integrated PLL free of supply-induced jitter. Bulk decoupling of 10 uF tantalum at the board's regulator output is also recommended. Because the part is CMOS, inrush current is low and separate analog/digital rails are not required, but keep noisy switching converters physically away from the X1/X2 crystal traces.
Route the 10 MHz X1/X2 crystal traces short and surrounded by GND to avoid stray pick-up; keep TX+/TX- and RX+/RX- differential pairs matched-length to within 5 mm so the Manchester decoder stays within IEEE 802.3 jitter tolerance. Place the coax termination resistor at the DP8392 transceiver end, not at the DP83910AN, to limit reflections on 10BASE2/10BASE5 cable. Pin 12 is the primary GND - use a single ground plane stitch under the DIP for thermal and EMI benefit.
Do not assume any new-production stock for DP83910AN because the part is obsolete per distributor data on 2026-10-22; verify distributor stock before committing to a long-life design. Watch for the lead-free (-NOPB) versus original leaded part, and note that a 28-PLCC labelled as 'equivalent' (DP83910AV) is NOT a board-level drop-in for the 24-DIP DP83910AN because the pin count and footprint differ - that is a redesign, not a swap.
合規資訊
Original DP83910AN is lead-bearing per distributor listings; lead-free / RoHS-compliant option is the DP83910AV/NOPB (different 28-PLCC package). Full RoHS/REACH compliance data was not present in the verified web sources for the original DP83910AN.
