SMSC TMC2005-JT Datasheet Download Page 4

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ARCNET 5 Port HUB Controller

Datasheet

Revision 1.1 (07-24-07)

Page 4

SMSC TMC2005-JT

DATASHEET

PIN CONFIGURATION

VSS

AGS

nPL

VSS7

nPULSE1
nPULSE2
nP1BAK

VDD5

nCKOEN

nRST

VSS6

nBJA
nBJB
nBJE
nMBA
nMBB
nMBE
nEXTOD

TMC2005-JT

TXENB1

EXTRX

VSS1

EXTTX

VDD1

CKO

VSS2

CKM2
CKM1
CKM0

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Summary of Contents for TMC2005-JT

Page 1: ...um 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 coa...

Page 2: ...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 whe...

Page 3: ...OR JITTER FILTERING 11 OPTION FEATURE FOR NOISE CUT MODE 11 APPLICATION NOTES 12 PORT GROUP 20 VARIOUS SETUP 20 EXAMPLE FOR OPERATION MODE SETUP TO EACH PORT 20 NOTE FOR UNUSED PORT 20 EXAMPLE FOR POW...

Page 4: ...VDD VDD3 VDD4 VSS4 XTLO XTLI VDD2 nPLLTST RXFLT R0 VSS7 nPULSE1 nPULSE2 nP1BAK VDD5 nCKOEN nRST VSS6 nBJA nBJB nBJE nMBA nMBB nMBE nEXTOD TMC2005 JT TXENB1 HM SE NC LE EXTRX ME VSS1 EXTTX VDD1 CKO VSS...

Page 5: ...rcuit NOT Circuit NOT Circuit NOT Circuit NOT Circuit Rx Buffer Output Control Circuit Tx Pulse Gen DPLL AND Circuit Clock Multiplier PLL TXENA0 TXENA1 TXENB0 TXENB1 EXTTX nP1BAK nPULSE1 nPULSE2 VSS1...

Page 6: ...It should be open Pull up 18 nPLLTST INPUT Test Pin for PLL It should connected to VDD Set to high 19 VDD2 Power Supply 20 XTLI INPUT X tal input External clock input 21 XTLO OUTPUT X tal output 22 V...

Page 7: ...B 0 Rx data input from media transceiver Pull up 60 SB INPUT Port B Polar assignment for RXINA0 A1 input 0 active Hi 1 Active Low Pull up 61 TXENB0 OUTPUT Port B 0 Tx output to media transceiver 62 LB...

Page 8: ...5 Mbps 1 0 1 1 x2 5 Mbps 1 1 0 Reserved Reserved Reserved 1 1 1 1 x4 10 Mbps External clock is 20MHz Refer to VARIOUS SETUP Noise cut mode nMBA nMBB nMBE INPUT 0 Cut off noise from received data 1 Do...

Page 9: ...ther Signals FEATURES NAME INPUT OUTPUT DESCRIPTION CRYSTAL INTERFACE XTLI INPUT Connect a 20MHz crystal When supplying an external clock input the clock to this pin CRYSTAL INTERFACE XTLO OUTPUT Conn...

Page 10: ...The interval timer detects the end of the bit pattern During data is on line silent period is less than 4 uS because at least one bit 1 among 10 bits is received while receiving the data The minimum s...

Page 11: ...ls threshold level in proportion to received light strength The first pulse especially after long time idle has the big jitter but the second pulse is stabilized 2 Changing polar of RX port In order t...

Page 12: ...24 07 Page 12 SMSC TMC2005 JT DATASHEET APPLICATION NOTES Example 1 A five ports HUB with HYC4000s in backplane mode FIGURE 1 APPLICATION EXAMPLE Only the TMC2005 and five transceivers are indicated...

Page 13: ...07 DATASHEET Example 2 A five ports HUB with HYC9088s and a optical transceiver TODX270A links the two physical layers dipulse and fiber optics FIGURE 2 APPLICATION EXAMPLE 2 Only the TMC2005 and five...

Page 14: ...TASHEET Example 3 A five ports HUB with two optical transceivers two HYC9088s and a HYC4000 links three physical layers fiber optics dipulse and AC 485 FIGURE 3 APPLICATION EXAMPLE 3 Only the TMC2005...

Page 15: ...1 07 24 07 DATASHEET Example 4 An on board type HUB with a COM20020 and four optical transceivers in backplane mode FIGURE 4 APPLICATION EXAMPLE 4 Only the TMC2005 and four transceivers with the COM2...

Page 16: ...ge 16 SMSC TMC2005 JT DATASHEET Example 5 An on board type HUB with a COM20020 and four RS485 transceivers FIGURE 5 APPLICATION EXAMPLE 5 Only the TMC2005 and four transceivers with the COM20020 are i...

Page 17: ...EET Example 6 An on board type HUB with a COM20020 two HYC4000s and two HYC9088s links two different physical layers dipulse and AC 485 FIGURE 6 APPLICATION EXAMPLE 6 Only the TMC2005 and four transce...

Page 18: ...SMSC TMC2005 JT DATASHEET Example 7 An eight ports HUB are composed by using two TMC2005 Two TMC2005 connects the EXTTX signal with the EXTRX signal FIGURE 7 APPLICATION EXAMPLE 7 Only the two TMC2005...

Page 19: ...uch as 74LS20 outside right example This connected method is excellent in noised respect compared with connected method of open drain mode FIGURE 8 APPLICATION EXAMPLE 8 Only the four TMC2005s are ind...

Page 20: ...MBB nMBE BIG JITTER nBJA nBJB nBJE EXTENSION nEXTOD Various Setup Example For Operation Mode Setup To Each Port SA SB SE LA LB LE MA MB ME RX POLAR TX POLAR TRANSCEIVER 1 0 1 Active Low Active Low HYC...

Page 21: ...ollow the guidelines at Figure 10 refer to Notes 1 through 5 FIGURE 10 PLL PATTERN LAYOUT Note 1 Prohibit the patterns for LP and RO from occupying the area of digital power supply Use the area of ana...

Page 22: ...and don t cross with other patterns Note 2 When using an external clock like an oscillator module connect it to XTLI pin and leave XTLO pin open When designing a printed circuit board wire between XTL...

Page 23: ...n the ARCNET protocol it is defined that the longest distance between nodes is the maximum 6 4Km For example if 20 TMC2005s exist between nodes in the longest distance the actual cable length is 3 7Km...

Page 24: ...2 3 4 5 4 3 2 1 2 3 4 5 TMC2005 TMC2005 4 3 2 1 2 3 4 5 4 3 2 1 2 3 4 5 TMC2005 TMC2005 4 3 2 1 2 3 4 5 4 3 2 1 2 3 4 5 TMC2005 TMC2005 4 3 2 1 2 3 4 5 4 3 2 1 2 3 4 5 HUB 1 HUB2 HUB 3 HUB4 NODE NODE...

Page 25: ...open drain output on a board connecting TMC2005s must be four or less and the data rate must be 5Mbps or slower The pattern of open drain output has to be as short as possible less than 15cm NODE NODE...

Page 26: ...se occurs only at A point in Figure 16 The noise propagates clockwise on the network TMC2005 detects the noise that came back through the ring The noise causes an endless loop in the ring Example for...

Page 27: ...e AC power is switch on or off In addition voltage transients on the AC power line may appear on the DC output If this possibility exists it is suggested that a clamp circuit be used Vss 0V ITEM SYMBO...

Page 28: ...45 47 VOL Low Level Output Voltage IOL 4mA 0 4 V 1 9 46 51 55 61 VOL Low Level Output Voltage IOL 8mA 0 4 V 11 45 47 AC CHARACTERISTIC CLOCK and RESET ITEM SYMBOL MIN TYP MAX UNIT CONDITION Generatin...

Page 29: ...650 nS Note1 Value at 2 5Mbps 9 8Tdr 10 8Tdr 50 RXIN First Active Edge to nP1BAK TXEN First Active Edge t6 450 550 nS Note2 Note3 Value at 2 5Mbps 1 2Tdr nP1BAK TXEN Low Pulse Width t7 200 nS Note2 Va...

Page 30: ...5Mbps 5 8Tdr 9 8Tdr 50 14 8Tdr 50 RXIN Active Edge to nPULSE1 Active Edge Except First Edge of RXIN t15 250 500 750 nS Note3 Value at 2 5Mbps nPULSE1 to nPULSE2 Overlap t16 10 0 10 nS 1 4Tdr nPULSE2 L...

Page 31: ...t SMSC TMC2005 JT Page 31 Revision 1 1 07 24 07 DATASHEET TMC2005 JT 64 PIN TQFP PACKAGE OUTLINE Zd Ze D1 E1 E 64 1 D SYMBOL MIN mm TYP mm MAX mm D 11 8 12 0 12 2 D1 9 9 10 0 10 1 E 11 8 12 0 12 2 E1...

Page 32: ...1 1 07 24 07 Page 32 SMSC TMC2005 JT DATASHEET SYMBOL MIN mm TYP mm MAX mm A 1 6 A1 0 95 0 1 0 15 A2 1 35 1 4 1 45 B 0 17 0 22 0 27 E 0 5 BSC aaa 0 08 bbb 0 08 SYMBOL MIN mm TYP mm MAX mm c 0 9 0 145...

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