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參數(shù)資料
| 型號： | CAMFACT |
| 英文描述： | 12A SCRS |
| 中文描述： | CaM含量尋址存儲器高速查詢，為網(wǎng)絡應用發(fā)動機 |
| 文件頁數(shù)： | 1/2頁 |
| 文件大?。?/td> | 196K |
| 代理商： | CAMFACT |
M
OT OROLA
High-Speed Look-Up Engines for Networking Applications
C
C
ONT ENT
-
-
A
A
DDRESSABLE
M
EMORIES
The MCM69C232/233 and the MCM69C432/433 are flexible content-addressable memories (CAMs) that can
contain 4096 and 16,384 entries of 64 bits, respectively. They are implemented with standard 4-transistor
SRAM cells that provide a CAM solution at a fraction of the cost of existing CAMs. The widths of the match
field and the output field are programmable, and the match time is designed to be
≤
180 nanoseconds for
MCM69C232/432. As a result, the MCM69C232/233 and the MCM69C432/433 are well suited for datacom
applications such as Virtual Path Identifier/ Virtual Circuit Identifier (VPI/VCI) translation in ATM switches up
to OC12 (622Mbps) data rates and Media Access Control (MAC) address lookup in Ethernet/Fast Ethernet
bridges. CAMs are also well suited for fully associative disk drive cache and RAID applications. The match
duty cycle of the MCM69C232/233 and the MCM69C432/433 is user defined, with a trade-off between the
time between matches and the number of new entries added to the CAM per second.
M C M 69C 232/233 Fe ature s
MCM69C232 – 50 MHz
MCM69C233 – 66 MHz
4096 Entries
Programmable 12- to 64-Bit Wide Match Field
MCM69C232 – 160 ns Match Time
MCM69C233 – 210 ns Match Time
MCM69C232 – 200 ns Insertion Time
MCM69C233 – 300 ns Insertion Time
(if 1 of 12 entry queue locations is empty)
MCM69C232 – 12 ms Initialization Time
MCM69C233 – 18 ms Initialization Time,
after Fast Insertion (at Power-up only)
C om m on Fe ature s
Mask Register to "Don’t Care" Selected Bits
Depth Expansion by Cascading Multiple Devices
Programmable 0– to 32–Bit Output Value
Separate Ports for Control and Match Operations
Single 3.3 V ± 5% Supply
IEEE Standard 1149.1 Test Port (JTAG)
Industrial Temperature Versions Available
MCM69C232TQ
4K x 64
3.3 V
160 ns match time
100-Pin TQFP
MCM69C233TQ
4K x 64
3.3V
210 ns match time
100-Pin TQFP
MCM69C432TQ
16K x 64
3.3V
180 ns match time
100-Pin TQFP
MCM69C433TQ
16K x 64
3.3V
240 ns match time
100-Pin TQFP
Part Number
Configuration
V
DD
Speed
Package
M C M 69C 432/433 Fe ature s
MCM69C432 – 50 MHz
MCM69C433 – 66 MHz
16,384 Entries
Programmable 14- to 64-Bit Wide Match Field
MCM69C432 – 180 ns Match Time
MCM69C433 – 240 ns Match Time
MCM69C432 – 300 ns Insertion Time
MCM69C433 – 450 ns Insertion Time
(if 1 of 14 Entry Queue Locations is Empty)
MCM69C432 – 80 ms Initialization Time
MCM69C433 – 120 ms Initialization Time,
after Fast Insertion (at Power-up only)
A v a ila ble P roduc ts a nd S pe c ific ations
Fa c t S h e e t
CAMFACT/D
Rev.1
F
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
.
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