My Inquiry
My Account
NXP Semiconductors SCC68692C1A44,529
.jpg)
- Part No.:
- SCC68692C1A44,529
- Manufacturer:
- NXP Semiconductors
- Package:
- 44-LCC (J-Lead)
- Datasheet:
-
SCC68692C1A44,529.pdf
- Description:
- IC DUART 1MBPS 44PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:4,475
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SCC68692C1A44,529 from NXP Semiconductors (formerly Philips Semiconductors) is a dual-channel CMOS-LSI universal asynchronous receiver/transmitter (DUART) in 44-pin PLCC package. It provides two independent full-duplex UART channels, quadruple-buffered receivers, programmable 5–8-bit data format with parity and 1/1.5/2 stop bits, and supports baud rates up to 115.2 kbaud. It is used in industrial terminal systems requiring dual-speed serial communication with hardware flow control.
For engineers reviewing the SCC68692C1A44,529 datasheet, SCC68692C1A44,529 pinout, SCC68692C1A44,529 application, or SCC68692C1A44,529 equivalent, key selection considerations include independent baud rate programming per channel, 6-bit input port with change-of-state detection, 8-bit output port with individual bit set/reset, on-chip crystal oscillator, and support for multidrop wake-up mode.
Technical Context
The SCC68692C1A44,529 implements two independent UART channels sharing a common S68000-compatible bus interface, with separate programmable baud rate generators and 16-bit counter/timer. Each channel supports normal, local/remote loopback, automatic echo, and multidrop (9-bit) modes.
It integrates a 6-bit multipurpose input port with four change-of-state detectors and an 8-bit output port configurable as general-purpose I/O or status/interrupt signals (e.g., RxRDYAN, TxRDYBN). The interrupt system features a single active-low INTRN output with eight maskable sources plus optional wire-ORable outputs via OP3–OP7.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Baud rates | Up to 115.2 kbaud per channel; selectable from 22 fixed rates or user-defined via 16-bit counter/timer |
| Data format | 5–8 data bits, odd/even/no/force parity, 1/1.5/2 stop bits programmable in 1/16-bit increments |
| Receiver buffering | Quadruple-buffered RHR per channel - reduces overrun risk and interrupt overhead in high-throughput systems |
| Power supply | +5 V ±10 %; operates across commercial (0 to +70 °C) and industrial (–40 to +85 °C) temperature ranges |
| Crystal oscillator | On-chip oscillator supporting 3.6864 MHz crystal (X1/CLK and X2 pins); external clock input also supported |
| Interrupt architecture | Single INTRN output with eight maskable conditions; IVR provides interrupt vector; OP3–OP7 configurable as discrete open-drain interrupt outputs |
| Input/output ports | 6-bit input port (IP0–IP5) with internal ~1–4 µA pull-ups; 8-bit output port (OP0–OP7) with individual bit set/reset and function assignment |
Pinout & Package
SCC68692C1A44,529 is housed in a 44-pin plastic leaded chip carrier (PLCC), SOT187-2 package, 16.5 mm × 16.5 mm body size, with J-lead termination and index corner marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 5, 6 | A1–A4 | Address inputs selecting internal registers and ports for CPU read/write access |
| 7, 4, 36, 2, 39, 38 | IP0–IP5 | 6-bit input port; configurable as CTS/RTS control, external clock inputs, or general-purpose inputs with change-of-state detection |
| 29, 12, 28, 13, 27, 14, 26, 15 | OP0–OP7 | 8-bit output port; individually settable/resettable; assignable to TxRDY/RxRDY/FFULL status, RTS/CTS control, or counter/timer outputs |
| 31, 10 | RxDA, RxDB | Channel A and B serial receive inputs; accept mark/space logic with start-bit detection and 16X oversampling |
| 30, 11 | TxDA, TxDB | Channel A and B serial transmit outputs; drive mark/space with programmable framing and break generation |
| 32, 33 | X1/CLK, X2 | Crystal oscillator terminals; support 3.6864 MHz crystal or external clock input for timing reference |
| 34 | RESETN | Active-low hardware reset; clears registers, stops counter/timer, and places transmitters in mark state |
| 35 | CSN | Chip select input; enables bidirectional data transfer on D0–D7 when low |
| 8 | R/WN | Read/write control; high = read, low = write during CSN-active cycles |
| 9 | DTACKN | Active-low data transfer acknowledge; indicates valid read data or completed write to CPU |
| 21 | INTRN | Active-low open-drain interrupt request; asserted when any of eight maskable conditions occur |
| 37 | IACKN | Interrupt acknowledge input; triggers IVR vector output on data bus during interrupt service |
| 25–19, 22–16 | D0–D7 | Bidirectional 3-state data bus; transfers commands, status, and data between CPU and DUART |
| 40 | VCC | +5 V power supply input |
| 20 | GND | Ground reference for all digital and analog circuitry |
Key Features
| Feature | Design Value |
|---|---|
| Independent channel configuration | Each UART channel supports unique data format, baud rate, and operating mode (e.g., one in normal, one in multidrop) |
| Hardware flow control | CTS/RTS handshaking per channel with automatic RTS deactivation after transmission completion |
| Receiver timeout detection | Counter/timer monitors idle line condition and asserts interrupt when character stream pauses - critical for multidrop polling |
| False start bit rejection | Validates start-bit transitions using 16X sampling and multi-sample consistency - prevents spurious character capture |
| Break handling | Detects and generates line breaks, including mid-character break detection and start-end break interrupt/status reporting |
| Power-down mode | Reduces ICC to ≤3.0 mA (CMOS inputs) while preserving register state - suitable for low-power polling applications |
Applications
| Industrial Terminal Clusters | Legacy Industrial PLC Communication |
|---|---|
|
Use Scenario: Multi-terminal systems where one host polls multiple remote terminals over RS-232/422 links, requiring asymmetric speed negotiation (e.g., host at 38.4 kbaud, terminals at 9.6 kbaud). IC Role / Device Role / Timing Role: DUART acts as dual-port serial interface controller; Channel A handles host link, Channel B manages terminal polling; independent baud rate selection enables speed-matched communication per link. Use Value: Eliminates need for external clock dividers or dual UART ICs; quadruple buffering prevents overrun during burst polling; multidrop wake-up mode reduces bus contention. |
Use Scenario: Retrofitting legacy programmable logic controllers with modern microprocessor-based I/O modules requiring synchronous serial command/response exchange. IC Role / Device Role / Timing Role: SCC68692C1A44,529 serves as protocol bridge; one channel handles ASCII command parsing, the other manages binary status reporting; counter/timer provides precise inter-character timing. Use Value: On-chip 16-bit timer replaces external timing ICs; input port change detection captures front-panel switch events without CPU polling; power-down mode extends module standby life. |
| Point-of-Sale (POS) Peripheral Hub | Medical Device Serial Gateway |
|
Use Scenario: Compact retail kiosk integrating barcode scanner, receipt printer, and cash drawer - each requiring independent serial handshaking and timing. IC Role / Device Role / Timing Role: DUART functions as centralized serial arbiter; OP0–OP7 drive peripheral enable/control lines; IP0–IP5 monitor hardware handshake signals (e.g., printer busy, drawer latch). Use Value: Single-chip solution replaces discrete logic + dual UARTs; RTS-controlled auto-deactivation ensures printer doesn't miss first character; RxRDY interrupts minimize CPU latency. |
Use Scenario: FDA-compliant patient monitor aggregating data from ECG, SpO₂, and NIBP modules via isolated RS-232 links before forwarding to central station. IC Role / Device Role / Timing Role: SCC68692C1A44,529 acts as safety-isolated serial concentrator; each channel buffers sensor data independently; receiver timeout detects module disconnection. Use Value: Quadruple buffering maintains data integrity during transient noise bursts; parity/framing error detection flags corrupted frames pre-transmission; industrial temp range ensures reliability in clinical environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual UART applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SCC68681B1A44,518 | Single-channel UART; identical pinout and register map but lacks Channel B and associated I/O (OP4–OP7, IP4–IP5, RxDB/TxDB) | Suitable only for single-link applications; cannot support dual independent serial streams or multidrop coordination | Select only if system requires exactly one UART channel and space/cost constraints prohibit dual-channel solution |
| TL16C550CPTR | Enhanced FIFO UART (16-byte TX/RX FIFO); no input/output port; different register set and interrupt structure; 48-pin TQFP package | Better suited for high-speed PC-style serial I/O; lacks multidrop mode, change-of-state detection, and programmable counter/timer | Choose when high-throughput streaming (e.g., >115.2 kbaud sustained) is required and auxiliary I/O is handled elsewhere |
Compared with SCC68692C1A44,529, the SCC68681B1A44,518 reduces integration by removing half the serial path and all dual-channel control logic, while the TL16C550CPTR trades configurability and embedded control features for deeper FIFO buffering and PC compatibility - neither offers the same combination of dual independent UARTs, integrated I/O, and multidrop timing control.
Availability
SCC68692C1A44,529 is available at Aetrix Electronics and suitable for industrial terminal clusters, legacy PLC communication interfaces, POS peripheral hubs, and medical device serial gateways requiring stable component supply and long-term lifecycle support.
Supply support for SCC68692C1A44,529 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 SCC68692C1A44,529 belongs to NXP's legacy communications IC portfolio, designed specifically for robust, programmable dual-serial interfacing in resource-constrained industrial and embedded systems requiring deterministic timing and hardware-assisted protocol handling.
FAQ
What is the maximum baud rate supported by the SCC68692C1A44,529?
The SCC68692C1A44,529 supports standard baud rates up to 115.2 kbaud per channel using its internal baud rate generator with a 3.6864 MHz crystal. Non-standard rates up to 115.2 kbaud are achievable via the 16-bit counter/timer, and external 1X or 16X clocks allow operation beyond this limit depending on input frequency and system timing margins.
Does the SCC68692C1A44,529 support hardware flow control?
Yes, the SCC68692C1A44,529 supports full hardware flow control per channel via dedicated RTS/CTS pins (OP0/IP0 for Channel A, OP1/IP1 for Channel B). The RTS outputs can be automatically deactivated after transmission completes, and CTS inputs gate transmission - both configurable through mode and command registers.
Can the SCC68692C1A44,529 operate with an external clock instead of a crystal?
Yes, the SCC68692C1A44,529 accepts an external clock signal on the X1/CLK pin, eliminating the need for a crystal. The X2 pin may be left unconnected or grounded. The external clock must meet specified frequency (0–4 MHz) and timing (tCLK ≥ 100 ns) requirements to ensure reliable operation of the baud rate generator and counter/timer.
What is the purpose of the 6-bit input port (IP0–IP5) on the SCC68692C1A44,529?
The 6-bit input port provides flexible auxiliary signal acquisition: it can serve as general-purpose inputs, CTS/RTS control lines, external clock sources for receivers/transmitters, or counter/timer inputs. Four pins (IP0–IP3) feature change-of-state detection with interrupt capability, enabling edge-triggered event capture without CPU polling.
How does the SCC68692C1A44,529 handle multidrop (9-bit) communication?
The SCC68692C1A44,529 implements true multidrop mode (also called 'wake-up' or '9-bit') where the ninth bit distinguishes address frames from data frames. In this mode, the receiver detects address characters, asserts an interrupt, and enables subsequent data reception - allowing one master to selectively activate multiple slaves on a shared bus.
SCC68692C1A44,529 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 44-LCC (J-Lead)
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Obsolete
- Features:
- Configurable GPIO, Internal Oscillator, Timer/Counter
- Number of Channels:
- 2, DUART
- FIFO's:
- -
- Protocol:
- -
- Data Rate (Max):
- 1Mbps
- Voltage - Supply:
- 5V
- With Auto Flow Control:
- Yes
- With IrDA Encoder/Decoder:
- -
- With False Start Bit Detection:
- Yes
- With Modem Control:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 44-PLCC (16.59x16.59)
SCC68692C1A44,529 FAQ
1.How can I place an order for SCC68692C1A44,529 through Aetrix?
Please submit a Request for Quotation (RFQ) for SCC68692C1A44,529 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 SCC68692C1A44,529 reliable?
The price and inventory of SCC68692C1A44,529 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SCC68692C1A44,529 is usually 5 days.
3.What payment methods are accepted for SCC68692C1A44,529?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SCC68692C1A44,529 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SCC68692C1A44,529?
SCC68692C1A44,529 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SCC68692C1A44,529 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 SCC68692C1A44,529?
For technical support, including SCC68692C1A44,529 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SCC68692C1A44,529 requirements.
6.How does Aetrix verify that SCC68692C1A44,529 is sourced from the original manufacturer or authorized distributors?
All SCC68692C1A44,529 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 SCC68692C1A44,529 meets industry standards.
7.What is the process for return or replacement of SCC68692C1A44,529?
All SCC68692C1A44,529 units undergo pre-shipment inspection (PSI). If there is an issue with SCC68692C1A44,529, 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 SCC68692C1A44,529 part is unused and in its original packaging.
Return procedure for SCC68692C1A44,529:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SCC68692C1A44,529 Tags
-
SC16IS741AIPWJ
NXP Semiconductors
-
TL16C550CPTR
Texas Instruments
-
TL16C550CIPTR
Texas Instruments
-
SC16C752BIB48,128
NXP Semiconductors
-
ST16C2550CQ48-F
MaxLinear, Inc.
-
ST16C2550CJ44-F
MaxLinear, Inc.
-
ST16C2552CJ44-F
MaxLinear, Inc.
-
ST16C1550IQ48-F
MaxLinear, Inc.
-
ST16C2550IQ48-F
MaxLinear, Inc.
-
ST16C554DIQ64-F
MaxLinear, Inc.
-
ST16C554DCQ64-F
MaxLinear, Inc.
-
XR17V352IB113-F
MaxLinear, Inc.
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
