TMC2005
PRELIMINARY
5 Port HUB Controller Device
FEATURES
§HUB Circuit for ARCNET Protocol (Data Rate From 156.25Kbps to 10Mbps)
§Able to Connect Various Transceivers Directly §Device Includes TX/RX Timing Circuit for 5 Port Hub and Direction Control Circuit, Jitter Correct Circuit and Noise Cancel Circuit
§Easy to Design 8 or 12 Port Hub §Can Connect with HYC9068 or HYC9088 in Normal Mode
§Can Connect with RS485 Transceiver,
HYC2485S, HYC2488S, Opt Module and TTL
Interface in Backplane Mode
§Supports both Normal and Backplane Mode at the Same Time for Media Conversion
§+ 5V Single Power
GENERAL DESCRIPTION
When configuring a network, the maximum number of nodes and the maximum cable length are limited by the electric capacity of the transceiver. In this case, the network is expanded by an equipment called a “HUB” or “repeater”.  It maybe necessary to have a converter between coax, T/P and the fiber cable. It is easy to design a HUB or a repeater because the TMC2005 has various features for expanding such network.
It can connect with HYC9088 and HYC9068, RS485 transceiver, HYC2485S, HYC2488S and TTL interface for optical module. It can connect with three different transceivers at the same time and convert the media of each. (The data rate cannot be converted. It is necessary to operate all nodes in the same network at the same data rate). The Hubs can be expanded by connecting two or more TMC2005 chips. By setting one of 5 ports to open-drain output.  The Hub can be expanded to either 12 or 16 ports.
© STANDARD MICROSYSTEMS CORPORATION (SMSC) 2000
80 Arkay Drive
Hauppauge, NY 11788
(631) 435-6000
FAX (631) 273-3123
Standard Microsystems is a registered trademark of Standard Microsystems Corporation, and SMSC is a trademark of Standard Microsystems Corporation. Product names and company names are the trademarks of their respective holders.  Circuit diagrams utilizing SMSC products are included as a means of illustrating typical applications; consequently complete information sufficient for construction purposes is not necessarily given.  Although the information has been checked and is believed to be accurate, no responsibility is assumed for inaccuracies.  SMSC reserves the right to make changes to specifications and product descriptions at any time without notice. Contact your local SMSC sales office to obtain the latest specifications before placing your product order. The provision of this information does not convey to the purchaser of the semiconductor devices described any licenses under the patent rights of SMSC or others. All sales are expressly conditional on your agreement to the terms and conditions of the most recently dated version of SMSC's standard Terms of Sale Agreement dated before the date of your order (the "Terms of Sale Agreement").  The product may con
tain design defects or errors known as anomalies which may cause the product's functions to deviate from published specifications.  Anomaly sheets are available upon request.  SMSC products are not designed, intended, authorized or warranted for use in any life support or other application where product failure could cause or contribute to personal injury or severe property damage.  Any and all such uses without prior written approval of an Officer of SMSC and further testing and/or modification will be fully at the risk of the customer.  Copies of this document or other SMSC literature, as well as the Terms of Sale Agreement, may be obtained by visiting SMSC’s website at www.smsc.
SMSC DISCLAIMS AND EXCLUDES ANY AND ALL WARRANTIES, INCLUDING WITHOUT LIMITATION ANY AND ALL IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, TITLE, AND AGAINST INFRINGEMENT, AND ANY AND ALL WARRANTIES ARISING FROM ANY COURSE OF DEALING OR USAGE OF TRADE.
IN NO EVENT SHALL SMSC BE LIABLE FOR ANY DIRECT, INCIDENTAL, INDIRECT, SPECIAL, PUNITIVE, OR CONSEQUENTIAL DAMAGES, OR FOR LOST DATA, PROFITS, SAVINGS OR REVENUES OF ANY KIND; REGARDLESS OF THE FORM OF ACTION, WHETHER BASED ON CONTRACT, TORT, NEGLIGENCE OF SMSC OR OTHERS, STRICT LIABILITY, BREACH OF WARRANTY, OR OTHERWISE; WHETHER OR NOT ANY REMEDY IS HELD TO HAVE FAILED OF I
TS ESSENTIAL PURPOSE; AND WHETHER OR NOT SMSC HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
TABLE OF CONTENTS FEATURES (1)
GENERAL DESCRIPTION (1)
PIN CONFIGURATION (4)
BLOCK DIAGRAM (5)
DESCRIPTION OF PIN FUNCTIONS (6)
TX/RX Interface (8)
Operating Mode Setup (9)
PLL (9)
Other Signals (10)
OPERATIONAL DESCRIPTION (11)
Direction Determination (11)
Direction Release (11)
Jitter Filter (11)
Option Feature for Jitter Filtering (12)
APPLICATION NOTES (13)
PORT GROUP (21)
Various Setup (21)
Example For Operation Mode Setup To Each Port (21)
Note for Unused port (21)
Example for Power-On Reset Circuit (21)
CONNECTING THE TMC2005 WITH INTERNAL PLL (22)
Method To Connect A Crystal Clock (23)
CASCADING CONNECTION (23)
Ring Network With the TMC2005 (27)
OPERATIONAL DESCRIPTION (29)
MAXIMUM GUARANTEED RATINGS* (29)
STANDARD OPERATING CONDITION (29)
DC CHARACTERISTIC - INPUT PIN (29)
DC CHARACTERISTIC - OUTPUT PIN (30)
AC CHARACTERISTIC - CLOCK and RESET (30)
TMC2005 60 PIN QFP PACKAGE OUTLINE (31)
PIN CONFIGURATION
BLOCK DIAGRAM
DESCRIPTION OF PIN FUNCTIONS
QFP PIN
NO.NAME
INPUT/
OUTPUT DESCRIPTION
1TXENB1OUTPUT Port B-1 TX output to media transceiver
2NC1Reserved. It should be open
3SE INPUT Port EXT. Polar assignment for EXTRX input
(0:active HI 1:active LO)
Pull-up
4NC2Reserved. It should be open
5LE INPUT Port EXT. Polar assignment for EXTRX input
(0:active LO 1:active HI)
Pull-up 6EXTRX INPUT Port EXT. RX-Data input from media transceiver Pull-up 7ME INPUT Port EXT. Output mode assignment of EXTTX
(0:pulse output 1:TX enable output)
Pull-up 8VSS1Ground
9EXTTX OUTPUT Port EXT. Output to media transceiver
10VDD1Power Supply
11CKO OUTPUT Clock Output
12VSS2Ground
13CKM2INPUT Network Speed (data rate) setting Pull-up 14CKM1INPUT Network Speed (data rate) setting Pull-up 15CKM0INPUT Network Speed (data rate) setting Pull-up 16RXFLT INPUT Test Pin. It
should be open Pull-up 17nPLLTST INPUT Test Pin for PLL. Must always connect to VDD
18VDD2Power Supplyconnect下载
19XTLI INPUT X’tal input/External clock input
20XTLO OUTPUT X’tal output
21VSS4Ground
22VDD4Power Supply
23VDD3Power Supply
24AVDD Analog Power Supply
25RO OUTPUT VCO output for internal PLL
26LP OUTPUT Connection pin to loop filter for internal PLL
27AGS INPUT Analog sense pin for internal PLL
28AVSS Analog Ground
29VSS3Ground
30VSS5Ground
31nEXTOD INPUT Port EXT. Open-drain mode (0:open-drain
output  1:normal output)
Pull-up 32nMBE INPUT Port EXT. Noise cut  (0:on 1:off)Pull-up 33nMBB INPUT Port EXT. A0/A1 Noise cut (0:on 1:off)Pull-up 34nMBA INPUT Port B0/B1 Noise cut (0:on 1:off)Pull-up 35nBJE INPUT Port EXT. Jitter correct mode (0: big jitter mode
1:normal mode)
Pull-up
36nBJB INPUT Port A0/A1 Jitter correct mode (0: big jitter mode
1:normal mode)
Pull-up
37nBJA INPUT Port B0/B1 Jitter correct mode (0:big jitter mode
1:normal mode)
Pull-up 38VSS6Ground
39nRST INPUT Internal reset signal (active low)Pull-up 40nCKOEN INPUT Enable of CKO output Pull-up 41VDD5Power Supply
42nP1BAK OUTPUT nPULSE1 output (for backplane mode)
43nPULSE2OUTPUT nPULSE2 output (for normal mode)
44nPULSE1OUTPUT nPULSE1 output (for normal mode)
45VSS7Ground
46RXINA0INPUT Port A-0 RX-data input from media transceiver Pull-up

版权声明：本站内容均来自互联网，仅供演示用，请勿用于商业和其他非法用途。如果侵犯了您的权益请与我们联系QQ:729038198，我们将在24小时内删除。