ST16C1451

Features:

Pin and functionally compatible to SSI 73M1550/2550
1 byte Transmit FIFO (THR)
1 byte Receive FIFO with error tags (RHR)
Four levels of prioritized interrupts
Modem Control Signals (CTS#, RTS#, DSR#,DTR#, RI#, CD#)
Programmable character lengths (5, 6, 7, 8) with even, odd or no parity
Crystal or external clock input (except 28 pin ST16C1451, external clock only)
1.5 Mbps Transmit/Receive operation (24 MHz) with programmable clock control
Power Down Mode (50 uA at 3.3 V, 200 uA at 5 V)
Software controllable reset output
2.97 to 5.5 Volt operation


Application

Battery Operated Electronics
Internet Appliances
Handheld Terminal
Personal Digital Assistants
Cellular Phones DataPort


Pinout




Specifications

Power Supply Range                                            7 Volts
Voltage at Any Pin                               GND -0.3 V to 7 V
Operating Temperature                            -40 to +85
Storage Temperature                            -65  to +150
Package Dissipation                                           500 mW


Description

The ST16C1450, ST16C1451 series (here on denoted as the ST16C1451 ) is a universal asynchronous receiver and transmitter (UART). The 145X is foot print compatible to the SSI 73M1550 and SSI 73M2550 UART with one byte FIFO and higher operating speed and lower access time. The ST16C1451 provides enhanced UART functions with a modem control interface, independent programmable baud rate generators with clock rates to 1.5 Mbps. Onboard status registers provide the user with error indications and operational status. System interrupts and modem control features may be tailored by external software to meet specific user requirements. An internal loop-back capability allows onboard diagnostics. The ST16C1451 is available in a 28-pin PLCC/plastic-DIP, 48-pin TQFP packages. The Baud rate generator can be configured for either crystal or external clock input with the exception of the 28 pin 1451 package. An external clock must be provided for the 28 pin 1451 package. Each package type, with the exception of the 28 pin 1450, provides a buffered reset output that
can be controlled through user software. The ST16C1451 is fabricated in an advanced CMOS process to achieve low drain power and high speed requirements.  The
ST16C145X is not compatible with the industry standard 16450 and will not work with the standard serial port driver in MS Windows (see pages 15-16 for
details) .  For a MS Windows compatible UART, see the ST16C450.