HFA3860A
Semiconductor
Data Sheet
November 1998
Direct Sequence Spread Spectrum
Baseband
4488.2
Features
• Complete DSSS Baseband Processor
The Harris HFA3860A Direct Sequence
Spread Spectrum (DSSS) baseband
processor is part of the PRISM™
2.4GHz radio chipset, and contains all
the functions necessary for a full or half duplex packet
baseband transceiver.
The HFA3860A has on-board A/Ds for analog I and Q inputs,
for which the HFA3724/6 IF QMODEM is recommended.
Differential phase shift keying modulation schemes DBPSK
and DQPSK, with data scrambling capability, are available
along with M-Ary Bi-Orthogonal Keying to provide a variety
of data rates. Built-in flexibility allows the HFA3860A to be
configured through a general purpose control bus, for a
range of applications. A Receive Signal Strength Indicator
(RSSI) monitoring function with on-board 6-bit A/D provides
Clear Channel Assessment (CCA) to avoid data collisions
and optimize network throughput. The HFA3860A is housed
in a thin plastic quad flat package (TQFP) suitable for
PCMCIA board applications.
Ordering Information
• Processing Gain . . . . . . . . . . . . . . . . . . . . . . . . . . ≥10.4dB
• Programmable Data Rate. . . . . . . .1, 2, 5.5, and 11MBPS
• Ultra Small Package . . . . . . . . . . . . . . . . . . . . 7 x 7 x 1mm
• Single Supply Operation (44MHz Max) . . . . . 2.7V to 3.6V
• Modulation Methods . . . . . . .DBPSK, DQPSK, and MBOK
• Supports Full or Half Duplex Operations
• On-Chip A/D Converters for I/Q Data (3-Bit, 22MSPS) and
RSSI (6-Bit)
• Backwards Compatible with HFA3860
• Supports Antenna Diversity
Applications
• Enterprise WLAN Systems
• Systems Targeting Ethernet Data Rates
• DSSS PCMCIA Wireless Transceiver
• Spread Spectrum WLAN RF Modems
• TDMA Packet Protocol Radios
• Part 15 Compliant Radio Links
• Portable Bar Code Scanners/POS Terminal
TEMP.
RANGE (oC)
PART NO.
File Number
• Portable PDA/Notebook Computer
PKG. TYPE
HFA3860AIV
-40 to 85
48 Ld TQFP
HFA3860AIV96
-40 to 85
PKG. NO.
Q48.7x7
Tape and Reel
• Wireless Digital Audio
• Wireless Digital Video
• PCN/Wireless PBX
Pinout
RXCLK
RXD
QIN
3-BIT
A/D
RSSI
6-BIT
A/D
1
RX_PE
CCA
GND
CCA
MCLK
PROCESSOR
INTERFACE
CTRL
VDD
ANTSEL
ANTSEL
SD
IOUT
SPREADER
RESET
MOD.
SCLK
SDI
DEMOD.
MD_RDY
QOUT
VDD
GND
IIN
GND
VDDA
VDDA
GND
VDDA
CS
VREFN
R/W
30
29
8
28
9
27
10
26
11
25
12
13 14 15 16 17 18 19 20 21 22 23 24
7
GND
VREFP
GND
VDD
QIN
TX_RDY
48 47 46 45 44 43 42 41 40 39 38 37
36
35
2
34
3
33
4
32
5
31
6
1
RSSI
TEST_CK
TX_PE
TXD
TXCLK
3-BIT
A/D
DATA TO NETWORK
PROCESSOR
IIN
DE-SPREADER
TEST0
SIMPLIFIED BLOCK DIAGRAM
TEST2
TEST1
TEST3
VDD
GND
TEST4
TEST6
TEST5
TEST7
IOUT
QOUT
HFA3860A (TQFP)
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-800-4-HARRIS | Copyright © Harris Corporation 1998
PRISM and Design® is a registered trademark of Harris Corporation. PRISM™ is a trademark of Harris Corporation.
