NXP Semiconductors SCC2692AE1N28,602

Overview

SCC2692AE1N28,602 from NXP Semiconductors (formerly Philips) is a dual-channel CMOS-LSI asynchronous receiver/transmitter (DUART) designed for microprocessor interfacing in polled or interrupt-driven systems. 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 kbps via internal 16× clocking. It is used in industrial terminal systems requiring multidrop wake-up and dual-speed serial communication.

For engineers reviewing the SCC2692AE1N28,602 datasheet, SCC2692AE1N28,602 pinout, SCC2692AE1N28,602 application, or SCC2692AE1N28,602 equivalent, key selection considerations include its 28-pin DIP package, TTL-compatible +5V operation, independent receiver/transmitter baud rate selection, on-chip crystal oscillator, and multidrop mode support for clustered terminal architectures.

Technical Context

The SCC2692AE1N28,602 implements two independent UART channels sharing a common 8-bit bidirectional data bus (D0–D7), address decoding (A0–A3), and interrupt control logic. Each channel features separate mode registers (MRA/MRB), control registers (CRA/CRB), status registers (SRA/SRB), and programmable baud rate sources - including 22 fixed rates, counter/timer-derived non-standard rates, or external 1X/16X clocks.

Its timing subsystem integrates a 3.6864 MHz crystal oscillator (X1/CLK, X2), a 16-bit programmable counter/timer, and four clock selectors enabling independent Rx/Tx clock assignment per channel. The device supports automatic echo, local/remote loopback, multidrop (9-bit) mode, and receiver timeout - all configurable via software command register writes.

Key Specifications

Pinout & Package

SCC2692AE1N28,602 is housed in a 28-pin plastic dual in-line package (DIP), SOT117-1, with 0.3-inch body width and standard 0.1-inch pin pitch. Pin 1 is index-corner marked; pins are numbered counter-clockwise from top-left when viewed from component side.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SCN2681AC1N28, SCC2692AE1N28,602 adds receiver timeout, 16-bit counter/timer, and multidrop mode - critical for energy-efficient terminal networks. Versus TL16C550CPF, it offers simpler register programming and direct DIP compatibility but lacks FIFO depth and speed - making it optimal for cost-sensitive, space-constrained industrial retrofits.

Availability

SCC2692AE1N28,602 is available at Aetrix Electronics and suitable for industrial terminal clusters, legacy system serial expansion, point-of-sale peripheral hubs, and embedded modem interfaces requiring stable component supply across extended product lifecycles.

Supply support for SCC2692AE1N28,602 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 roots in Philips' pioneering analog and mixed-signal IC development.

The SCC2692AE1N28,602 belongs to NXP's legacy communications interface product line, engineered specifically for reliable, low-complexity serial communication in industrial control and terminal equipment where long-term availability and software stability are paramount.

FAQ

What is the maximum baud rate supported by the SCC2692AE1N28,602?

The SCC2692AE1N28,602 supports a maximum baud rate of 115.2 kbps using its internal 16× clocking architecture. This is achieved with a 3.6864 MHz crystal or external clock source. Non-standard rates up to 115.2 kbps are also possible via the programmable 16-bit counter/timer, though actual achievable rate depends on clock accuracy and system timing margins.

Does the SCC2692AE1N28,602 support hardware flow control?

Yes, the SCC2692AE1N28,602 supports hardware flow control via its multipurpose I/O pins. IP0 and IP1 serve as active-low clear-to-send (CTSAN/CTSBN) inputs, while OP0 and OP1 function as request-to-send (RTSAN/RTSBN) outputs. These can be enabled per channel through mode register configuration to automatically throttle transmission when buffers fill.

Is the SCC2692AE1N28,602 pin-compatible with the SCN2681 series?

Yes, the SCC2692AE1N28,602 is pin-compatible with the SCN2681AC1N28 and SCN2681AE1N28 in the 28-pin DIP package. All signal names, pin locations, and electrical characteristics match, allowing direct replacement in existing designs - though firmware may require updates to leverage enhanced features like receiver timeout or multidrop mode.

What clock sources can drive the SCC2692AE1N28,602?

The SCC2692AE1N28,602 accepts either a 3.6864 MHz crystal across X1/CLK and X2 pins, or an external square-wave clock applied to X1/CLK (with X2 left unconnected or grounded). The device also supports external 1X or 16X clocks fed directly to IP3–IP6 for receiver/transmitter timing - enabling asynchronous clock domains per channel.

How does the quadruple receiver buffering benefit system design?

The quadruple receiver buffering in the SCC2692AE1N28,602 provides four levels of receive holding register depth per channel, significantly reducing the risk of character overrun during high-speed or burst serial reception. This lowers interrupt service routine frequency and eases real-time response requirements - especially valuable in interrupt-driven systems with limited CPU bandwidth or deterministic latency constraints.