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Exar Corporation

XR16L580 Datasheet Preview

XR16L580 Datasheet

SMALLEST 2.25V TO 5.5V UART

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XR16L580
SMALLEST 2.25V TO 5.5V UART WITH 16-BYTE FIFO AND POWERSAVE
JANUARY 2004
GENERAL DESCRIPTION
FEATURES
REV. 1.2.0
The XR16L580 (L580) is a 2.25 to 5.5 volt Universal
Asynchronous Receiver and Transmitter (UART) with
5 volt tolerant inputs and a reduced pin count. It is
pin-to-pin and software compatible to industry
standard 16C450, 16C550, ST16C580, ST16C650A
and XR16C850 UARTs. It has 16 bytes of TX and RX
FIFOs and is capable of operating up to serial data
rate of 1 Mbps at 2.25 volt supply voltage. The
internal registers is compatible to the 16C550
register set plus enhanced registers for additional
features to support today’s high bandwidth data
communication needs. The enhanced features
include Intel or Motorola data bus interface to match
your CPU interface, automatic hardware and
software flow control to prevent data loss, selectable
RX and TX trigger levels for more efficient interrupt
service, wireless infrared (IrDA) encoder/decoder for
wireless applications and a unique Power-Save mode
to increase battery operating time. The device comes
in the 48-TQFP and a very small 32-QFN packages in
industrial temperature range.
APPLICATIONS
Handheld Terminals and Tablets
Handheld Computers
Wireless Portable Point-of-Sale Terminals
Cellular Phones DataPort
GPS Devices
Personal Digital Assistants Modules
Battery Operated Instruments
Industry Smallest Full Featured UART
2.25V to 5.5V Operation
5V Tolerant Inputs
Intel/Motorola Bus Select
’0 ns’ Address Hold Time (TAH and TADH)
Pin and Software Compatible to industry standard
16C450, 16C550, ST16C580, ST16C650A and
XR16C850 in the 48-TQFP package.
16-byte Transmit FIFO
16-byte Receive FIFO with Errors Flags
Selectable RX and TX FIFO Trigger Levels
Automatic Hardware (RTS/CTS) Flow Control
Automatic Software (Xon/Xoff) Flow Control
Up to 3.125 Mbps Data Rate at 5V and 2 Mbps at
3.3V and 1 Mbps at 2.25V Operation with External
Clock Input
Infrared (IrDA) Encoder/Decoder
Complete Modem Interface
Power-Save Mode to conserve battery power
Sleep Mode with Wake-up Interrupt
Small 32-QFN (5x5x0.9mm) package
Compatible to standard 48-TQFP packages
without the following redundant signals: IOR,
IOW, CS1, CS2, TXRDY#, RXRDY#, RCLK,
BAUDOUT#, OP1# and OP2#
Industrial Temperature Grade(-40 to +85oC)
FIGURE 1. BLOCK DIAGRAM
PwrSave
A2:A0
D7:D0
IOR#
IOW# (R/W#)
CS#
INT (IRQ#)
RESET
(RESET#)
16/68#
Intel or
Motorola
Data Bus
Interface
*5 V Tolerant Inputs
UART
UART 16 Byte TX FIFO
Regs
TX
&
RX
IR
ENDEC
BRG 16 Byte RX FIFO
Crystal Osc/Buffer
VCC
(2.25 to 5.5 V)
GND
TX, RX,
RTS#, CTS#,
DTR#, DSR#,
RI#, CD#
XTAL1
XTAL2
GNugget_BLK
Exar Corporation 48720 Kato Road, Fremont CA, 94538 (510) 668-7000 FAX (510) 668-7017 www.exar.com




Exar Corporation

XR16L580 Datasheet Preview

XR16L580 Datasheet

SMALLEST 2.25V TO 5.5V UART

No Preview Available !

XR16L580
SMALLEST 2.25V TO 5.5V UART WITH 16-BYTE FIFO AND POWERSAVE
FIGURE 2. PACKAGES AND PIN OUT
áç
REV. 1.2.0
24 23 22 21 20 19 18 17
DSR#
CD#
RI#
VCC
D0
D1
D2
D3
25
26
27
28 32-pin QFN in
29 Intel Bus Mode
30
31
32
16 NC
15 NC
14 IOR#
13 GND
12 IOW#
11 XTAL2
10 XTAL1
9 PwrSave
12345678
VCC
DSR# 25
16 NC
CD# 26
15 NC
RI# 27
14 NC
VCC 28
32-pin QFN in 13 GND
D0 29 Motorola Bus Mode 12 R/W#
D1 30
D2 31
11 XTAL2
10 XTAL1
D3 32
9 PwrSave
GND
NC
CTS#
DSR#
CD#
RI#
VCC
D0
D1
D2
D3
D4
NC
36 35 34 33 32 31 30 29 28 27 26 25
48-TQFP in
Intel Bus Mode
1 2 3 4 5 6 7 8 9 10 11 12
NC
NC
NC
NC
NC
IOR#
GND
NC
IOW#
XTAL2
XTAL1
PwrSave
VCC
NC
CTS#
DSR#
CD#
RI#
VCC
D0
D1
D2
D3
D4
NC
36 35 34 33 32 31 30 29 28 27 26 25
48-TQFP in
Motorola Bus Mode
1 2 3 4 5 6 7 8 9 10 11 12
NC
NC
NC
NC
NC
NC
GND
NC
R/W#
XTAL2
XTAL1
PwrSave
GND
ORDERING INFORMATION
PART NUMBER
XR16L580IL
XR16L580IM
PACKAGE
32-QFN
48-TQFP
OPERATING TEMPERATURE RANGE
-40°C to +85°C
-40°C to +85°C
2


Part Number XR16L580
Description SMALLEST 2.25V TO 5.5V UART
Maker Exar Corporation
Total Page 30 Pages
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