ST16C554D Datasheet, PDF (1/40 Pages) Exar Corporation – QUAD UART WITH 16-BYTE FIFOS

ST16C554/554D
ST68C554
QUAD UART WITH 16-BYTE FIFO’S
DESCRIPTION
The ST16C554D is a universal asynchronous receiver
and transmitter (UART) with a dual foot print interface.
The 554D is an enhanced UART with 16 byte FIFOs,
receive trigger levels and data rates up to 1.5Mbps.
Onboard status registers provide the user with error
indications and operational status, modem interface
control. System interrupts may be tailored to meet
user requirements. An internal loopback capability
allows onboard diagnostics. The 554D is available in
64 pin TQFP, and 68 pin PLCC packages. The 68 pin
PLCC package offer an additional 68 mode which
allows easy integration with Motorola, and other popu-
lar microprocessors. The ST16C554CQ64 (64 pin)
offers three state interrupt control while the
ST16C554DCQ64 provides constant active interrupt
outputs. The 64 pin devices do not offer TXRDY/
RXRDY outputs. The 554D combines the package
interface modes of the 16C554 and 68C554 series on
a single integrated chip.
FEATURES
• Compatibility with the Industry Standard
ST16C454, ST68C454, ST68C554, TL16C554
• 1.5 Mbps transmit/receive operation (24MHz)
• 16 byte transmit FIFO
• 16 byte receive FIFO with error flags
• Independent transmit and receive control
• Software selectable Baud Rate Generator
• Four selectable Receive FIFO interrupt trigger
levels
• Standard modem interface
-DSRA 10
-CTSA 11
-DTRA 12
VCC 13
-RTSA 14
INTA 15
-CSA 16
TXA 17
-IOW 18
TXB 19
-CSB 20
INTB 21
-RTSB 22
GND 23
-DTRB 24
-CTSB 25
-DSRB 26
PLCC Package
ST16C554DCJ68
16 MODE
60 -DSRD
59 -CTSD
58 -DTRD
57 GND
56 -RTSD
55 INTD
54 -CSD
53 TXD
52 -IOR
51 TXC
50 -CSC
49 INTC
48 -RTSC
47 VCC
46 -DTRC
45 -CTSC
44 -DSRC
ORDERING INFORMATION
Part number
Pins Package Operating temperature
ST16C554DCJ68 68 PLCC
0° C to + 70° C
ST16C554DCQ64 64 TQFP
0° C to + 70° C
ST16C554CQ64 64 TQFP
0° C to + 70° C
ST16C554DIJ68 68 PLCC
-40° C to + 85° C
ST16C554DIQ64 64 TQFP
-40° C to + 85° C
Rev. 3.10
EXAR Corporation, 48720 Kato Road, Fremont, CA 94538 • [phone] • FAX [phone]