SMSC TMC2005-JT - Manual (Page 29)

ARCNET 5 Port HUB Controller
Datasheet
SMSC TMC2005-JT Page 29 Revision 1.1 (07-24-07)
DATASHEET
AC CHARACTERISTIC – Rx waveforms and Tx waveforms
FIGURE 18 - RX WAVEFORMS AND TX WAVEFORMS
ITEMS MARK MIN TYP MAX UNIT REMARK
RXIN Low Pulse Width t1 15 nS
RXIN High Pulse Width t2 15 nS
Tdr
RXIN Period t3
(400)
nS (Value at 2.5Mbps)
2/8Tdr 3/8Tdr+50
RXIN First Active Edge to TXEN Active t4
(100) (200)
nS
Note1
(Value at 2.5Mbps)
111/8Tdr 112/8Tdr+50
RXIN Last Active Edge to TXEN Inactive t5
(5,550) (5,650)
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
(Value at 2.5Mbps)
1/2Tdr
nP1BAK/TXEN High Pulse Width t8
(200)
nS
Note2
(Value at 2.5Mbps)
Tdr
nP1BAK/TXEN Period t9
(400)
nS
Note2
(Value at 2.5Mbps)
5/8Tdr 9/8Tdr+50 14/8Tdr+50 RXIN Active Edge to
nP1BAK/TXEN Active Edge
(Except First Edge of RXIN)
t10
(250) (500) (750)
nS
Note2, Note3
(Value at 2.5Mbps)
RXINx (S=1)
TXENy (M=1, L=0)
nP1BAK
/TXENy (M=0, L=0)
nPULSE1
nPULSE2
t1
t2
t3
t4 t5
t6
t7
t8
t9
t10
t11
t12
t13
t14
t15
t16
t17
t18
t19
* 4 ports except received port
(Received port)
* 4 ports except received port