NXP Semiconductors SCC2692AE1N28,129

Overview

SCC2692AE1N28 from NXP Semiconductors (formerly Philips) is a dual-channel CMOS-LSI universal asynchronous receiver/transmitter (DUART) in a 28-pin plastic DIP package, operating at +5 V, supporting independent programmable baud rates up to 115.2 kbaud per channel, quadruple receiver buffering, and TTL-compatible bus interface for microprocessor systems.

For engineers reviewing the SCC2692AE1N28 datasheet, SCC2692AE1N28 pinout, SCC2692AE1N28 application, or SCC2692AE1N28 equivalent, key selection considerations include dual full-duplex UART channel independence, 16-bit counter/timer integration, multidrop wake-up mode support, and industrial temperature range (–40°C to +85°C) operation.

Technical Context

The SCC2692AE1N28 implements two fully independent UART channels (A and B), each with separate receiver and transmitter baud rate selection from 22 fixed rates (50–115.2 kbaud), external 1X/16X clock inputs, or programmable counter/timer-derived rates. Each channel supports programmable data format (5–8 data bits, odd/even/no/force parity, 1/1.5/2 stop bits in 1/16-bit increments) and six operational modes including normal, automatic echo, local/remote loopback, and multidrop (9-bit/wake-up).

It integrates a 16-bit counter/timer with timer, counter, and receiver timeout modes; a 7-bit multipurpose input port with change-of-state detection on four pins; an 8-bit multipurpose output port with individual bit set/reset and configurable interrupt/status outputs; and a single active-low open-drain interrupt output (INTRN) with eight maskable sources plus optional discrete interrupt outputs on OP3–OP7.

Key Specifications

Pinout & Package

SCC2692AE1N28 uses a 28-pin plastic dual in-line package (DIP), SOT117-1, with 0.3-inch body width and 0.1-inch pin pitch. Pin 1 is index-corner marked; pin 22 is GND; pin 28 is VCC. All I/O pins are TTL-compatible with internal pull-ups on IP0–IP6 (1–4 µA source current).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual UART applications.

Compared with SCN2681AC1N28, SCC2692AE1N28 adds counter/timer, multidrop, and receiver timeout - enabling smarter link management. Compared with TL16C550CPFN, it trades larger FIFO for on-chip oscillator and wake-up capability - favoring self-contained, low-component-count industrial designs.

Availability

SCC2692AE1N28 is available at Aetrix Electronics and suitable for industrial serial gateways, legacy terminal controllers, telecom line card interfaces, and test equipment control hubs requiring stable component supply, long lifecycle support, and guaranteed industrial temperature operation.

Supply support for SCC2692AE1N28 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 leader focused on secure connectivity solutions for automotive, industrial, and IoT applications, with deep heritage in legacy communications ICs acquired from Philips.

The SCC2692AE1N28 belongs to NXP's industrial communications portfolio, designed specifically for long-lifecycle embedded systems requiring robust, pin-stable UART functionality in harsh environments.

FAQ

What is the maximum supported baud rate for SCC2692AE1N28?

The SCC2692AE1N28 supports 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 programmable 16-bit counter/timer or external 1X/16X clock inputs. The device does not support rates beyond this limit, and actual performance depends on crystal tolerance and signal integrity of the serial path.

Does SCC2692AE1N28 include an on-chip crystal oscillator?

Yes, the SCC2692AE1N28 integrates a crystal oscillator circuit. Pins X1/CLK and X2 accept a 3.6864 MHz crystal directly, eliminating the need for external oscillator components. When used with crystal, the oscillator meets all AC timing requirements across the industrial temperature range (–40°C to +85°C). External clock input to X1/CLK is also supported up to 4 MHz.

How many interrupt sources does SCC2692AE1N28 support?

The SCC2692AE1N28 supports eight maskable interrupt sources routed to the single active-low INTRN output: receiver ready, transmitter ready, break detect, framing error, parity error, overrun error, counter/timer timeout, and input port change. Additionally, outputs OP3–OP7 can be configured as discrete open-drain interrupt signals - providing up to six dedicated interrupt wires for complex system partitioning.

What is the function of the 7-bit input port on SCC2692AE1N28?

The 7-bit input port (IP0–IP6) on the SCC2692AE1N28 serves dual roles: as general-purpose digital inputs or as dedicated control signals (e.g., CTS, external clocks, or counter/timer inputs). Four pins (IP0–IP3) feature change-of-state detection with 25–50 µs pulse recognition, and all pins include internal 1–4 µA pull-up resistors - enabling direct connection to open-collector or switch-based interfaces without external biasing.

Is SCC2692AE1N28 compatible with the SCN2681 family?

Yes, the SCC2692AE1N28 is explicitly stated as compatible with the SCN2681 in its official product specification. It maintains identical pinout, register mapping, and basic UART functionality while adding enhancements including a 16-bit counter/timer, multidrop (9-bit/wake-up) mode, receiver timeout, and expanded baud rate flexibility - making it a functional superset for drop-in upgrades where those features are needed.