DP8344BV - 20MHz 8-Bit Communications Processor | Texas Instruments
料号： DP8344BV ✗ 停产| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $34.89 | $34.89 |
| 10 | $34.89 | $348.90 |
| 100 | $34.89 | $3,489.00 |
| 500 | $34.89 | $17,445.00 |
| 1,000 | $34.89 | $34,890.00 |
DP8344BV 概述
A communications processor is a specialized microprocessor that combines protocol handling, data movement, and control functions into one device. The DP8344BV belongs to the embedded microprocessor hierarchy, where its protocol-specific architecture reduces the external logic required for legacy communications equipment. Its 20 MHz operating speed and 8-bit processing path place it in the classic embedded-controller class rather than a modern high-performance application processor.
The verified specifications identify one 8-bit core operating at 20 MHz, a 4.5 V to 5.5 V supply range, and an 84-pin PLCC package. The listed protocol support covers IBM 3270 3299 and 5250 communications, with an additional general-purpose protocol mode. Its tube packaging and legacy PLCC footprint make it primarily relevant to maintenance, repair, and replication of established industrial or data-communications systems rather than new compact embedded platforms.
Because this processor integrates communications-protocol functions, it can simplify the control architecture of systems requiring those protocols. A designer can use the BCP to manage terminal or controller behavior while reducing the need for separate protocol-conversion glue logic. The trade-off is architectural specialization: the device is designed around legacy communications workloads and does not represent a general-purpose replacement for modern MCU families.
DP8344BV is available in tube packaging according to the verified distributor data. Its operating voltage, clock, processor architecture, package, and protocol support make it most suitable for legacy IBM communications equipment, industrial controllers, terminal interfaces, and repair assemblies where the original system architecture must be preserved. Designers should verify the complete pinout, memory interface, timing, and protocol requirements against the manufacturer datasheet before laying out or repairing a PCB.
This page combines verified distributor specifications, lifecycle information, package data, sourcing observations, and design guidance for DP8344BV. Because no verified drop-in substitute was identified in the supplied cross-reference results, replacement decisions should be based on complete pin, timing, protocol, and system-level validation rather than broad processor similarity.
DP8344BV 最大额定值与电气特性
| Product Type | 8-bit Biphase Communications Processor (BCP) |
| Processor Architecture | 8-bit Harvard-architecture RISC |
| Number of Cores | 1 core |
| Processor Width | 8-bit |
| Clock Frequency | 20 MHz |
| Operating Voltage Range | 4.5 V to 5.5 V |
| Supported Protocol | IBM 3270 3299 and 5250 communications protocols; general-purpose 8-bit protocol |
| Package Type | 84-pin PLCC |
| Package Dimensions | 29.31 mm x 29.31 mm |
| Packaging | Tube |
| RoHS 状态 | Non-compliant |
| Lead-Free Status | Contains lead |
| Manufacturer Category | Microprocessor IC |
| 生命周期状态 | Obsolete |
DP8344BV 29.31 mm x 29.31 mm 引脚配置指南
DP8344BV（29.31 mm x 29.31 mm 封装）的引脚配置。 该数字 IC 包含 GPIO、通信接口（UART、SPI、I2C）和电源引脚。请参阅制造商数据手册以了解复用引脚功能和配置选项。对嵌入式系统设计和 PCB 布局至关重要。
暂无详细引脚数据： DP8344BV.
请参阅 数据手册 以查看完整引脚配置。
典型应用
DP8344BV 适用于 6 应用s: Legacy IBM 3270 Communications Equipment, IBM 5250 Protocol Controllers, Industrial Terminal Interfaces, Legacy Data Communications Equipment, Protocol-Critical Equipment Repair, Vintage Communication Processor Boards.
Legacy IBM 3270 Communications Equipment
DP8344BV fits systems that require dedicated processing for the IBM 3270 3299 communications protocol because its verified BCP role is specifically associated with that protocol family. Place the processor where its established memory, clock, reset, and communications interfaces match the original controller design. Its 20 MHz 8-bit Harvard-architecture RISC core can reduce external protocol-handling requirements, but the legacy PLCC footprint and obsolete lifecycle make this primarily a maintenance or replication choice.
推荐
IBM 5250 Protocol Controllers
DP8344BV is appropriate for legacy controller designs whose communications behavior depends on the IBM 5250 protocol. Its integrated BCP function targets communications-protocol processing rather than generic control, allowing an existing architecture to retain a defined protocol implementation. The verified 4.5 V to 5.5 V supply range and 20 MHz clock must be reproduced exactly or validated against the original timing. Because no substitute was verified, board repair should use the same device and datasheet revision where possible.
推荐
Industrial Terminal Interfaces
The processor can support industrial terminal-interface assemblies that retain DP8344BV-based control and IBM communications behavior. Its 8-bit RISC core at 20 MHz provides a defined legacy processing platform, while the BCP architecture concentrates protocol handling into one component. The 84-pin PLCC package is large for a new design but useful when preserving an existing PCB. Verify the complete pinout, external memory behavior, timing margins, and obsolete-part sourcing before approving a repair release.
推荐
Legacy Data Communications Equipment
DP8344BV is suited to legacy data-communications equipment that requires IBM 3270 or 5250 protocol support and has already been designed around its BCP architecture. The dedicated protocol capability can simplify a system that would otherwise require additional communications-control logic. Its 20 MHz clock and 4.5 V to 5.5 V operating range should be checked against the original power and timing design. For new equipment, a current MCU with documented equivalents is generally more sustainable than an obsolete BCP.
推荐
Protocol-Critical Equipment Repair
DP8344BV is a practical repair candidate for equipment whose existing board, firmware, and timing depend on the original BCP behavior. Using the same 8-bit 20 MHz processor and 84-pin PLCC package can preserve board-level integration without changing the legacy architecture. However, a repair team must verify markings, supply voltage, clock source, reset behavior, memory connections, and all protocol interfaces against the datasheet. Obsolete inventory should be treated as a controlled sourcing item rather than a standard active catalog choice.
推荐
Vintage Communication Processor Boards
DP8344BV can be used in vintage communication-processor boards when the original system requires its specialized protocol support and board footprint. The 84-pin PLCC package allows placement on a compatible legacy board, but it does not by itself prove that any other PLCC processor can substitute. Check signal names, supply rails, clock timing, reset polarity, bus direction, memory mapping, and package orientation. For restoration work, retain the original processor whenever a tested genuine unit is available.
推荐
推荐产品汇总
工程参考数据： DP8344BV ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 |
|---|---|
| Package | 84-pin PLCC |
| Brand | Texas Instruments |
| Processor Type | 8-bit RISC Biphase Communications Processor |
| Clock Frequency | 20 MHz |
| Operating Voltage | 4.5 V to 5.5 V |
| Core Count | 1 core |
| Protocol Support | IBM 3270 3299 and 5250; general-purpose 8-bit protocol |
| Lifecycle Status | Obsolete |
| Packaging | Tube |
| Reference Price | $34.89 as of 2026-10-22 |
关键差异点
- Dedicated Biphase Communications Processor architecture （对比 Generic 8-bit microcontroller)
- 20 MHz integrated legacy processing platform （对比 Modern general-purpose microcontroller)
- Legacy system compatibility over modern availability （对比 Current active microcontroller)
设计说明
Do not treat a generic 8-bit processor with a PLCC package as a replacement. The verified DP8344BV identity includes a 20 MHz Harvard-architecture RISC BCP, 4.5 V to 5.5 V operation, and IBM 3270 3299 and 5250 protocol support. Before any substitution, compare every pin, power rail, clock input, reset behavior, memory interface, timing parameter, and protocol function against the original manufacturer datasheet. The supplied data does not identify a verified drop-in alternative.
Reconstruct the original power design before installing DP8344BV in service. The verified operating range is 4.5 V to 5.5 V, but current consumption, tolerance, sequencing, and rail decoupling are not available in the supplied data. Use the complete DP8344B datasheet and the original schematic to verify supply levels, bypass capacitors, ground connections, and startup behavior. Do not infer current limits or regulator sizing from the processor frequency.
For repair or replication, preserve the original PLCC footprint, pin-1 orientation, clock routing, reset network, and communications routing unless the complete datasheet proves a change. The verified package is an 84-pin PLCC measuring 29.31 x 29.31 mm, but package dimensions alone do not establish pin compatibility. Validate signal direction, voltage levels, timing margins, and external memory connections with the manufacturer documentation and the original board schematic.
Obsolete status changes the sourcing strategy. The supplied records report both immediate-delivery language and an obsolete classification, so procurement should confirm current stock, condition, traceability, quantity, and lot consistency at the time of purchase. Search-engine inventory counts are not a substitute for a supplier quotation. For long-lived equipment, retain tested original parts and document the exact package, revision, and inspection result.
合规信息
The verified DigChip specification record labels DP8344BV as RoHS non-compliant and indicates that it contains lead. No verified REACH, AEC-Q100, halogen-free, or conflict-minerals declarations were supplied.
