NXP Semiconductors SCC2692AE1N40,129

Overview

SCC2692AE1N40 from NXP Semiconductors (formerly Philips) is a dual-channel CMOS-LSI universal asynchronous receiver/transmitter (DUART) in a 40-pin DIP package, operating at +5V with industrial temperature range (−40°C to +85°C). It provides two independent full-duplex UART channels, quadruple-buffered receivers, programmable baud rates up to 115.2 kbps, and integrated 16-bit counter/timer - used in legacy industrial control systems, serial terminal clusters, and embedded communication gateways.

For engineers reviewing the SCC2692AE1N40 datasheet, SCC2692AE1N40 pinout, SCC2692AE1N40 application, or SCC2692AE1N40 equivalent, key selection considerations include independent Rx/Tx baud rate configuration per channel, multidrop wake-up mode support, TTL-compatible parallel bus interface (A0–A3, RDN/WRN), and dual 7-bit input / 8-bit output multifunction ports for status signaling and clock routing.

Technical Context

The SCC2692AE1N40 implements two independent UART channels sharing a single 3.6864 MHz crystal oscillator or external clock input, with separate baud rate generators selecting from 22 fixed rates or user-defined rates via its 16-bit counter/timer. Each channel supports programmable data format (5–8 data bits, odd/even/no parity, 1/1.5/2 stop bits) and five operational modes including normal, local/remote loopback, automatic echo, and multidrop (9-bit wake-up).

Its interrupt architecture features a single active-low open-drain INTRN output with eight maskable sources, plus configurable OP3–OP7 pins as discrete wire-ORable interrupt outputs. The 7-bit input port includes change-of-state detection on IP0–IP3, while the 8-bit output port supports individual bit set/reset and functional assignment to TxRDY/RxRDY/FFULL signals or RTS/CTS control.

Key Specifications

Pinout & Package

SCC2692AE1N40 is housed in a 40-pin plastic dual in-line package (DIP), SOT129-1, with 0.6-inch width and through-hole mounting. Pin 1 is index corner; pins 22 and 44 are GND and VCC respectively.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SCC2692AE1N40, SCC2691AE1N40 reduces channel count and pin count but sacrifices dual-port flexibility, while TL16C550CPN improves throughput and power options at the cost of losing hardware-based multidrop addressing and input change detection - making SCC2692AE1N40 uniquely suitable for deterministic industrial cluster control.

Availability

SCC2692AE1N40 is available at Aetrix Electronics and suitable for industrial serial gateways, legacy terminal cluster controllers, and embedded test equipment interfaces requiring stable component supply and long-term lifecycle assurance.

Supply support for SCC2692AE1N40 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, headquartered in Eindhoven, Netherlands, develops high-performance analog and mixed-signal semiconductors for automotive, industrial, and communication markets.

The SCC2692 belongs to NXP's legacy communications IC portfolio, designed specifically for robust, low-power serial interfacing in industrial control, point-of-sale, and telecom infrastructure where deterministic timing and long-lifecycle support are mandatory.

FAQ

What is the maximum supported baud rate for SCC2692AE1N40?

The SCC2692AE1N40 supports a maximum baud rate of 115.2 kbps using its internal baud rate generator with a 3.6864 MHz crystal. Non-standard rates up to this limit are achievable via the 16-bit counter/timer, and external 1X or 16X clocks allow further customization. This rate is validated across the full industrial temperature range (−40°C to +85°C) and ensures reliable RS-232/RS-422 link operation in noise-prone environments.

Does SCC2692AE1N40 support hardware flow control?

Yes, SCC2692AE1N40 supports hardware flow control via dedicated input pins IP0 (CTSAN) and IP1 (CTSBN) for Channels A and B, respectively. When CTS is asserted (low), transmission proceeds; if deasserted mid-transmission, the current character completes before TxDA/TxDB enters mark state. RTS outputs OP0 and OP1 can be automatically controlled by the transmitter to signal readiness - all configured via mode and command registers.

Can SCC2692AE1N40 operate without an external crystal?

Yes, SCC2692AE1N40 can operate without an external crystal by applying a 3.6864 MHz clock directly to the X1/CLK pin while leaving X2 unconnected or grounded. The on-chip oscillator circuitry is bypassed in this mode, and all timing functions - including baud generation and counter/timer - derive from the external clock. This configuration maintains full functionality and is commonly used in systems with shared clock trees.

What is the purpose of the 7-bit input port on SCC2692AE1N40?

The 7-bit input port (IP0–IP6) on SCC2692AE1N40 serves dual roles: as general-purpose digital inputs or as dedicated control signals (e.g., CTS, external clock inputs RxCA/TxCA). Four pins (IP0–IP3) feature hardware change-of-state detection that sets flags in the input port change register and can trigger interrupts - enabling event-driven monitoring of external switches, sensor edges, or bus activity without CPU polling.

How does the multidrop (9-bit/wake-up) mode function in SCC2692AE1N40?

In multidrop mode, SCC2692AE1N40 interprets the 9th bit of received data as an address flag. When enabled, the receiver detects a 9th-bit '1' as an address byte and asserts an interrupt; subsequent bytes with 9th-bit '0' are treated as data. This allows one host to selectively activate specific remote DUARTs on a shared bus - a capability confirmed in the SCC2692 datasheet and essential for clustered terminal systems with minimal wiring.