MU9C4485A Datasheet, PDF (1/28 Pages) MUSIC Semiconductors – WidePort LANCAM® Family

Preliminary Data Sheet
WidePort LANCAM^® Family
APPLICATION BENEFITS
Enhances Ethernet and Token-Ring LAN bridges
and switches:
Ø 64-bit width stores 48-bit MAC address plus
associated data (Port ID, time stamp,
“permanent” flag)
Ø 32-bit I/O supports multiple ports of fast
(100 Mb) Ethernet or Gigabit Ethernet
Ø Station list depth flexibility with choice of
pin-compatible device densities and
glue-free cascading
Ø 3.3 Volt option for low power systems
Ø Industrial temperature grades for harsh
environments
DISTINCTIVE CHARACTERISTICS
Ø 4096 (4485A/L), 2048 (2485A/L), and 1024
(1485A/L) word CMOS content-addressable
memories (CAMs)
Ø 64-bit word width
Ø 32-bit I/O compatible with the MU9C1485
Ø Fast 50 ns compare speed
Ø Dual configuration register set for rapid
context switching
Ø Increased flexibility of MUSIC’s patented
CAM/RAM partitioning
Ø 80-pin TQFP package with the same pinout as
the MU9C1485 and MU9C1965A/L
Ø 5 volt (A) or 3.3 volt (L) operation
(3 2 )
M UX
D ATA (6 4 )
DQ31–0
(3 2 )
(3 2 )
TRA N S L A TE
(8 02 .3 /8 0 2 .5 )
DEM U X
D ATA (6 4 )
/W
/E
/CM
/EC
/R E S ET
(3 2 )
C O MM AN D S
& S TA TU S
CO NTRO L
LO GIC
CO NTRO L
AND ST AT US
REG IS T ER S
SOURCE AND
D E S TINA TIO N
SEGM ENT
C O U N TE R S
15/14
17/16
COM PARAND
M AS K R E G IS TE R 1
M AS K R E G IS TE R 2
CAM A RR AY
32K or 16K
W ORDS
X 6 4 B ITS
Block Diagram
LANCAM, the MUSIC logo, and the phrase “MUSIC Semiconductors” are registered trademarks of MUSIC Semiconductors. MUSIC is
a trademark of MUSIC Semiconductors. Certain features of this device are patented under US Patent 5,383,146.
/M A
/M M
2
FLAG
LO G IC
/FF
/FI
/M F
/M I
2 December 1998 Rev. 2