TK28C94 - Quad-UART

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    • Contains 4 industry standard UARTS.
    • 8 bit transmit / receive FIFOs for each UART.
    • Programmable data formats
      • 5, 6, 7 or 8 data bits.
      • Even, odd, one, zero, or no parity.
      • 1, 1.5 or 2 stop bits.
    • Programmable baud rates
      • 23 Fixed rates
      • User definable rates from internal counter.
      • External 1X or 16X clock.
      • Separate transmit and receive baud rates.
    • Parallel ports for modem status and control functions.
    • 0.35u technology supports up to 3 MB operation (50 MHz clock).
      • Enhanced performance.
      • Digital input filter for noise suppression.
      • False start bit rejection.
      • General purpose scratch register.
      • Framing error detection and recovery.
      • Break generation and detection.
      • Overrun detection
      • Parity error detection
      • Multiple loopback modes
    • Advanced interrupt controller.
      • Programmable priorities
      • Vectored interrupts
    • Available in 52 pin PLCC.
    • RoHS Compliant.


General Description

The TK28C94 is a replacement for the Philips SC28C94. It may also be used to replace the SC68C94 and the SC26C94.

The TK28C94 consists of 4 identical UARTS, organized as two groups of two. Each group contains a timer/counter which may be used for additional baud timings or for watchdog functions. Parallel ports are provided for modem control. An independent baud rate generator provides 23 different fixed baud rates. A programmable interrupt controller prioritizes all of the interrupt sources, and provides an interrupt vector for a low-overhead interrupt service routine.

Ordering Cross Reference

NXP Tekmos Package
SC28C94A1A TK28C94A1A PLCC-52
SC28C94C1A TK28C94A1A PLCC-52
SC26C94A1A TK28C94A1A PLCC-52
SC26C94C1A TK28C94A1A PLCC-52
SC26C94A1N TK28C94A1N PDIP-48
SC26C94C1N TK28C94A1N PDIP-48


The data sheet is available here: pdf TK28C94 (92 KB)


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