ST16C552

Features:

Added features in device revision "F" and newer:
· 5V Tolerant Inputs
· Pin to pin and functional compatible to ST16C452/452PS, TL16C552
· 2.97 to 5.5 volt operation
· 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
· TTL compatible inputs, outputs
· Power down mode




Pinout






Specifications

Supply range 7 Volts
Voltage at any pin GND - 0.3 V to VCC +0.3 V
Operating temperature -40° C to +85° C
Storage temperature -65° C to 150° C
Package dissipation 500 mW

Specifications
CH	2
CPUInterface	Intel
Data Rate@5/3.3/2.5V	1.5/0.5/na
Tx/RxFIFO(Bytes)	16/16
Tx/RxFIFOCtrs	No
Tx/RxFIFOINT Trig	No/ 4 Levels
AutoRTS/CTS	No
IrDaSup	No
5VTolInputs	Yes
Sup V	2.97-5.5
Pkgs	PLCC-68

Description

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.