1.5 Mbps Dual Universal Asynchronous Receiver/Transmitter (UART)-PLCC-68

Mfr Part#: ST16C552CJ68-F
Mounting Method:  Surface Mount
Package Style:  PLCC-68
Packaging:  TUBE
Std Packaging Qty:  19



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$5.15 USD (each)
5 - 24 $5.15
25 - 99 $4.28 (Save 17%)
100+ $4.12 (Save 20%)


Qty in Stock : 9
Factory Stock : 4,531
Factory Lead-Time: 5-10 Days
Min. Order Qty: 5
Multiple of: 1
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Product Highlight

  • Data Rate: 1.5 Mbps
  • No of Functions / Channels: 2
  • Interface Circuit Type: PARALLEL
  • Supply Voltage-Nom: 2.97 to 5.5 V
EXAR, the market leader, offers the industry's broadest line-up of UART and serial protocol transceivers solutions.

With over 200 devices, wide 2.25 to 5.5V power supply range, 1 to 128 bytes of FIFO and compliance with the universal 3.3/5V PCI, Intel and Motorola bus interfaces, including single protocol ICs that support RS-232, RS-422 or RS-485 as well as dual and multi-protocol ICs that support from 2 to 8 of the most popular interface standards with a single IC, Exar has already done the difficult work for you.

We can deliver an immediate competitive advantage to your compressed time-to-market demands accelerating initial design, to functioning prototype and finally volume production.

The ST16C552/ST16C552A (552/552A) is a dual universal asynchronous receiver and transmitter (UART) with an added bi-directional parallel port that is directly compatible with a CENTRONICS type printer. The parallel port is designed such that the user can configure it as general purpose I/O interface, or for connection to other printer devices.

The 552/552A provides enhanced UART functions with 16 byte FIFO’s, a modem control interface, and data rates up to 1.5Mbps. Onboard status registers provide the user with error indications and operational status. The system interrupts and control may be tailored to meet user requirements. An internal loop-back capability allows onboard diagnostics. A programmable baud rate generator is provided to select transmit and receive clock rates from 50 bps to 1.5 Mbps.

The 552/552A is available in a 68 pin PLCC package. The 552/552A is compatible with the 16C450 and 16C550. The difference between the ST16C552 and ST16C552A is the logic state of the printer port, INTP interrupt. The INTP interrupt is active high (logic 1) on the ST16C552 whereas INTP is active low (logic 0) on the ST16C552A part when the interrupt latch mode is selected. The 552/552A is fabricated in an advanced CMOS process with power down mode to reduce the power consumption. The 552A does not support the power down mode.


  • Pin to pin and functional compatible to ST16C452/452PS, TL16C552
  • Software compatible with INS8250, NS16C550
  • 1.5 Mbps transmit/receive operation (24MHz)
  • 16 byte transmit FIFO
  • 16 byte receive FIFO with error flags
  • Independent transmit and receive control
  • Modem and printer status registers
  • UART port and printer port Bi-directional
  • Printer port direction set by single control bit or 8 bit pattern (AA/55)
  • Modem control signals (-CTS, -RTS, -DSR, -DTR, -RI, -CD)
  • Programmable character lengths (5, 6, 7, 8)
  • Even, odd, or no parity bit generation and detection
  • Internal loop-back diagnostics
  • TTL compatible inputs, outputs
  • Power down mode
  • Pb-Free, RoHS Compliant Versions Offered
Dual UART With 16-Byte FIFO and Parallel Printer Port

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