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NXP Semiconductors SCC2698BE1A84,518
- Part No.:
- SCC2698BE1A84,518
- Manufacturer:
- NXP Semiconductors
- Package:
- 84-LCC (J-Lead)
- Datasheet:
-
SCC2698BE1A84,518.pdf
- Description:
- IC UART OCTAL ENHANCED 84-PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:4,172
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Product details
Overview
SCC2698BE1A84 from NXP Semiconductors (formerly Philips) is an enhanced octal universal asynchronous receiver/transmitter (UART) IC providing eight independent full-duplex serial channels in a single 84-pin PLCC package. It supports up to 115.2 kbaud, quadruple-buffered receivers per channel, independent Rx/Tx baud rate selection, and integrated 16-bit counter/timers. It is used in industrial terminal servers, multi-port serial concentrators, and legacy embedded communications systems requiring high channel density and TTL-compatible +5 V operation.
For engineers reviewing the SCC2698BE1A84 datasheet, SCC2698BE1A84 pinout, SCC2698BE1A84 application, or SCC2698BE1A84 equivalent, key selection considerations include per-channel baud rate independence, 3-deep receiver FIFO with RxRDY/FFULL status outputs, MPP/MPO pin programmability for RTS/CTS flow control and timer clock routing, and industrial temperature range (–40 °C to +85 °C) support.
Technical Context
The SCC2698BE1A84 implements four dual-UART blocks (A/B, C/D, E/F, G/H), each with dedicated 16-bit counter/timers, independent clock selectors, and separate mode register sets (MR1/MR2). Its timing architecture allows simultaneous use of crystal oscillator (3.6864 MHz), external clocks, or timer-derived 1X/16X rates for Rx and Tx paths per channel.
Each channel features quadruple buffering (3-character FIFO + shift register), false start bit detection, line break generation, and programmable data format (5–8 data bits, odd/even/no/force parity, 1/1.5/2 stop bits in 1/16-bit increments). Interrupt logic provides eight maskable conditions per block, with four open-drain INTR outputs supporting wire-OR configuration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels | Eight independent full-duplex UARTs grouped into four dual-channel blocks |
| Baud Rate Range | 50 to 115.2 kbaud; 26 fixed rates + user-defined via 16-bit counter/timer |
| Receiver Buffering | Quadruple buffered: 3-character FIFO + 1-character shift register - prevents overrun at high burst rates |
| Power Supply | +5 V ±5 %; supports low-power mode with oscillator freeze while retaining register state |
| Operating Temperature | –40 °C to +85 °C (industrial grade, per ordering code E1A84) |
| Package | 84-pin Plastic Leaded Chip Carrier (PLCC); pin-compatible with SCC2698BC1A84 (commercial) |
| Interface Logic | TTL-compatible parallel bus: 8-bit bidirectional D0–D7, A0–A5 address, WRN/RDN/CEN control |
Pinout & Package
SCC2698BE1A84 is housed in an 84-pin Plastic Leaded Chip Carrier (PLCC) package with J-lead geometry, designed for surface-mount assembly and socket compatibility. Pin 1 is located at the index corner adjacent to the notch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| D0–D7 | Data Bus I/O | Active-high 8-bit bidirectional bus; transfers registers, commands, and status under CEN/WRN/RDN control |
| A0–A5 | Address Inputs | Selects one of 64 internal registers per channel block (e.g., MR1a, RHRg, CSRc, IMRC) |
| RxDa–RxDh | Serial Input | Asynchronous receive input per channel; sampled at 1X or 16X clock edge depending on CSR setting |
| TxDa–TxDh | Serial Output | Asynchronous transmit output per channel; outputs marking (high) when idle or disabled |
| MPOa–MPOh | Multi-Purpose Output | Programmable as TxRDY, RxRDY/FFULL, TxC1X/TxC16X, RxC1X/RxC16X, or RTSN per channel |
| MPP1a–MPP1h | I/O Pin (configurable) | When output: TxRDY status; when input: external Tx clock source (1X or 16X) |
| MPP2a–MPP2h | I/O Pin (configurable) | When output: RxRDY/FFULL status; when input: external Rx clock source (1X or 16X) |
| MPI0a–MPI0h | Multi-Purpose Input 0 | Configurable as CTSN (active-low clear-to-send) with change-of-state detection |
| X1/CLK, X2 | Clock Input | Crystal or external clock interface; supports 3.6864 MHz crystal or 1–10 MHz external source |
| INTRAN–INTRDN | Interrupt Outputs | Four active-low open-drain interrupt lines - one per dual-channel block (A/B, C/D, E/F, G/H) |
Key Features
| Feature | Design Value |
|---|---|
| Per-channel baud rate independence | Enables dual-speed operation (e.g., host at 115.2 kbaud, peripheral at 9.6 kbaud) without external clock switching logic |
| 3-level receiver FIFO + shift register | Reduces CPU interrupt overhead by up to 75% vs. single-character buffering in high-throughput serial links |
| 16-bit counter/timer per dual-channel block | Generates precise 16X baud clocks or timeout intervals; eliminates need for external timing ICs |
| RTS/CTS flow control with auto-handshake | Hardware-managed RTS assertion/negation based on FIFO fill level - no software polling required |
| Industrial temperature grade (–40 °C to +85 °C) | Validated for deployment in factory automation, transportation, and outdoor telecom infrastructure |
Applications
| Industrial Terminal Server | Legacy POS Back-End Interface |
|---|---|
Use Scenario: Aggregating serial connections from 8 point-of-sale peripherals (barcode scanners, receipt printers, cash drawers) into a single PCI/ISA host interface. IC Role / Device Role / Timing Role: Octal UART acts as parallel-to-serial bridge; each channel handles one peripheral's RS-232/RS-485 link with independent baud rate and framing. Use Value: Eliminates need for eight discrete UARTs and associated glue logic; reduces BOM count and PCB area by >60% versus discrete solution. |
Use Scenario: Enabling legacy RS-232-based payment terminals to communicate with modern Linux-based transaction controllers via ISA bus. IC Role / Device Role / Timing Role: Provides TTL-level UART interface with programmable stop bits (1.5-bit) and force parity to match legacy protocol requirements. Use Value: Maintains backward compatibility with decades-old firmware without modifying host driver stack or requiring external level shifters. |
| Multi-Port Serial Concentrator | Embedded Control Panel Hub |
Use Scenario: Centralized management of serial diagnostics ports across 8 rack-mounted network switches in a data center cabinet. IC Role / Device Role / Timing Role: Acts as serial multiplexer; routes console traffic over shared Ethernet using per-channel interrupt prioritization and FIFO status flags. Use Value: Enables concurrent access to all 8 switch consoles via single SSH session - no manual port switching or hardware KVM required. |
Use Scenario: Interfacing touch panel, keypad, display backlight, and sensor inputs in medical device control panels with ARM-based main controller. IC Role / Device Role / Timing Role: Provides dedicated UART channels for each subsystem plus MPP pins repurposed as GPIO for LED indicators and button debouncing. Use Value: Consolidates serial and digital I/O functions into one IC - avoids adding separate GPIO expanders or level translators. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal UART applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| EXAR XR16L788CJ-F | 32-byte FIFO per channel, PCIe interface option, +3.3 V only, no crystal oscillator | Requires external level shifter for +5 V systems; lacks integrated oscillator and industrial temp grade | Preferred for new designs targeting low-power, high-FIFO-depth PCIe-attached serial expansion |
| Maxim MAX3108ETJ+ | Single-channel SPI UART, 128-byte FIFO, integrated transceivers, +2.7 V to +5.5 V | Not octal - requires eight instances for equivalent channel count; SPI interface changes host driver architecture | Suitable for space-constrained IoT nodes where SPI bus sharing and ultra-low power outweigh channel density needs |
Compared with EXAR XR16L788CJ-F and Maxim MAX3108ETJ+, the SCC2698BE1A84 delivers native +5 V operation, integrated crystal oscillator, industrial temperature rating, and true octal integration - making it uniquely suited for retrofitting and maintaining legacy industrial backplanes without redesigning power, clocking, or bus architecture.
Availability
SCC2698BE1A84 is available at Aetrix Electronics and suitable for industrial terminal servers, legacy POS back-end interfaces, multi-port serial concentrators, embedded control panel hubs, and factory automation gateways requiring stable component supply across extended product lifecycles.
Supply support for SCC2698BE1A84 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
NXP Semiconductors is a global semiconductor company formed from the spin-off of Philips Semiconductors in 2006, specializing in secure connectivity solutions for automotive, industrial, and IoT applications.
The SCC2698BE1A84 belongs to NXP's legacy communications IC portfolio, originally developed to consolidate high-channel-count serial I/O in industrial control and telecom infrastructure - emphasizing reliability, long-term availability, and backward compatibility with 1980s–1990s system architectures.
FAQ
What is the maximum supported baud rate for SCC2698BE1A84?
The SCC2698BE1A84 supports up to 115.2 kbaud using its internal baud rate generator or timer-derived clocks. This maximum applies to both receiver and transmitter paths independently. Achieving 115.2 kbaud requires either selecting the corresponding fixed-rate entry in the BRG table or programming the 16-bit counter/timer with a divisor that yields a 16× clock frequency of 1.8432 MHz - typically derived from a 3.6864 MHz crystal. The device does not support rates beyond 115.2 kbaud in standard configurations.
Does SCC2698BE1A84 include an integrated crystal oscillator?
Yes, the SCC2698BE1A84 includes an on-chip crystal oscillator circuit. It operates directly from a 3.6864 MHz crystal connected between pins X1/CLK and X2. If an external clock is preferred, it can be applied to X1/CLK while leaving X2 unconnected. The oscillator output feeds the baud rate generator, counter/timers, and internal timing logic - eliminating the need for external clock generation components in most designs.
How many interrupt outputs does SCC2698BE1A84 provide, and how are they assigned?
The SCC2698BE1A84 provides four active-low open-drain interrupt outputs: INTRAN, INTRBN, INTRCN, and INTRDN. Each corresponds to one of the four dual-channel blocks (A/B, C/D, E/F, G/H). For example, INTRAN signals interrupts from channels A and B, while INTRCN covers channels E and F. These outputs support wire-OR connection and are individually maskable via the interrupt mask register (IMR) for each block.
Can SCC2698BE1A84 operate with a 3.3 V supply?
No, the SCC2698BE1A84 is specified exclusively for +5 V ±5 % operation. Its I/O structure, internal logic thresholds, and electrical characteristics are designed for TTL-compatible signaling at 5 V. Attempting to operate it at 3.3 V will result in undefined behavior, failure to meet timing specifications, and potential damage due to improper biasing of internal circuits. For 3.3 V systems, alternative UARTs such as the EXAR XR16L788 or NXP SC16IS752 should be considered.
What is the function of the MPP1 and MPP2 pins on SCC2698BE1A84?
MPP1 and MPP2 pins on the SCC2698BE1A84 are programmable multi-purpose I/O pins - one pair per channel (e.g., MPP1a/MPP2a for channel A). When configured as outputs via the OPCR register, MPP1 reflects TxRDY status and MPP2 reflects RxRDY/FFULL status. When configured as inputs, MPP1 accepts external Tx clock (1X or 16X) and MPP2 accepts external Rx clock (1X or 16X). All MPP pins include internal pull-up resistors and support change-of-state detection.
SCC2698BE1A84,518 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 84-LCC (J-Lead)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Features:
- Configurable GPIO, Internal Oscillator, Timer/Counter
- Number of Channels:
- 8
- FIFO's:
- -
- Protocol:
- RS485
- Data Rate (Max):
- -
- Voltage - Supply:
- 5V
- With Auto Flow Control:
- Yes
- With IrDA Encoder/Decoder:
- -
- With False Start Bit Detection:
- Yes
- With Modem Control:
- Yes
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 84-PLCC (29.26x29.26)
SCC2698BE1A84,518 FAQ
1.How can I place an order for SCC2698BE1A84,518 through Aetrix?
Please submit a Request for Quotation (RFQ) for SCC2698BE1A84,518 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 SCC2698BE1A84,518 reliable?
The price and inventory of SCC2698BE1A84,518 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SCC2698BE1A84,518 is usually 5 days.
3.What payment methods are accepted for SCC2698BE1A84,518?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SCC2698BE1A84,518 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SCC2698BE1A84,518?
SCC2698BE1A84,518 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SCC2698BE1A84,518 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 SCC2698BE1A84,518?
For technical support, including SCC2698BE1A84,518 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SCC2698BE1A84,518 requirements.
6.How does Aetrix verify that SCC2698BE1A84,518 is sourced from the original manufacturer or authorized distributors?
All SCC2698BE1A84,518 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 SCC2698BE1A84,518 meets industry standards.
7.What is the process for return or replacement of SCC2698BE1A84,518?
All SCC2698BE1A84,518 units undergo pre-shipment inspection (PSI). If there is an issue with SCC2698BE1A84,518, 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 SCC2698BE1A84,518 part is unused and in its original packaging.
Return procedure for SCC2698BE1A84,518:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SCC2698BE1A84,518 Tags
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SC16IS741AIPWJ
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