Philips Semiconductors
Octal UART with TTL compatibility at 3.3V
and 5V supply voltages
Product specification
SC26C198 SC68C198
SC26L198 SC68L198
Uses
Statistical Multiplexers
Data Concentrators
Packet–switching networks
Process Control
Building or Plant Control
Laboratory data gathering
ISDN front ends
Computer Networks
Point–of–Sale terminals
Automotive, cab and engine controls
Entertainment systems
MIDDI keyboard control music systems
Theater lighting control
Terminal Servers
Computer–Printer/Plotter links
FEATURES
• Single 3.3v power supply
• Eight Philips industry standard full duplex UART channels
• Sixteen byte receiver FIFOs for each UART
• Sixteen byte transmit FIFOs for each UART
• In band flow control using programmable Xon/Xoff characters
• Flow control using CTSN RTSN hardware handshaking
• Automatic address detection in multi-drop mode
• Three byte general purpose character recognition
• Fast data bus, 30 ns data bus release time, 125 ns bus cycle time
• Programmable interrupt priorities
• Automatic identification of highest priority interrupt pending
• Global interrupt and control registers ease setup and interrupt
handling
• Vectored interrupts with programmable interrupt vector formats
– Interrupt vector modified with channel number
– Interrupt vector modified with channel number and channel type
– Interrupt vector not modified
• IACKN and DACKN signal pins
• Watch dog timer for each receiver (64 receive clock counts)
• Programmable Data Formats:
– 5 to 8 data bits plus parity
– Odd, even force or no parity
– 1, 1.5 or 2 stop bits
• Flexible baud rate selection for receivers and transmitters:
– 22 fixed rates; 50 – 230.4K baud or 100 to 460.8K baud
– Additional non–standard rates to 500K baud with internal
generators
– Two reload–counters provide additional programmable baud
rate generation
– External 1x or 16x clock inputs
– Simplified baud rate selection
• 1 MHz 1x and 16x data rates full duplex all channels.
• Parity, framing and overrun error detection
• False start bit detection
• Line break detection and generation
• Programmable channel mode
– Normal(full duplex)
– Diagnostic modes
automatic echo
local loop back
emote loop back
• Four I/O ports per UART for modem controls, clocks, RTSN, I/O
etc.
– All I/O ports equipped with ”Change of State Detectors”
• Two global inputs and two global outputs for general purpose I/O
• Power down mode
• On chip crystal oscillator, 2–8 MHz
• TTL input levels. Outputs switch between full VCC and VSS
• High speed CMOS technology
• 68 pin PLCC
ORDERING CODE
PACKAGES
84-Pin Plastic Leaded Chip Carrier (PLCC)
84-Pin Plastic Leaded Chip Carrier (PLCC)
84-Pin Plastic Leaded Chip Carrier (PLCC)
84-Pin Plastic Leaded Chip Carrier (PLCC)
NOTES:
1. For availability, please contact factory.
VCC = 5V ±10%
Commercial
0°C to +70°C
Industrial1
-40°C to +85°C
SC26C198C1A
SC26C198A1A
SC68C198C1A
SC68C198A1A
VCC = 3.3V ±10%
Commercial
0°C to +70°C
Industrial1
-40°C to +85°C
SC26L198C1A
SC26L198A1A
SC68L198C1A
SC68L198A1A
DWG #
SOT189-3
SOT189-3
SOT189-3
SOT189-3
1995 May 1
337