COM20022I3V-HT SMSC, COM20022I3V-HT Datasheet - Page 72

• Manufacturer Part Number: COM20022I3V-HT
• Description: IC CTRLR ARCNET 2KX8 RAM 48-TQFP
• Manufacturer: SMSC
• Series: ARCNETr

Specifications of COM20022I3V-HT

• Controller Type: ARCNET Controller
• Interface: Differential
• Voltage - Supply: 4.5 V ~ 5.5 V
• Current - Supply: 65mA
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 48-TQFP, 48-VQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 638-1004

Revision 09-27-07
(Internal Clk)
nPULSE2
nPULSE1
nTXEN
RXIN
Above values are for 2.5 Mbps.
Other Data Rates are shown below.
T
*t5, t6 = T
*t2, t7, t10 = T
*t3, t11 = T
**t9 =
**t13 =
DR
t1
t2
t3
t4
t5
t6
t7
t8
t13
t9
t10
t11
t12
is the Data Rate Period
7
4
5
4
x T
Beginning Last Bit Time to nTXEN High**
nPULSE2 High to nTXEN Low
nPULSE1 Pulse Width
nPULSE1 Period
nPULSE2 Low to nPULSE1 Low
nPULSE2 High Time
nPULSE2 Low Time
nPULSE2 Period
nPULSE2 High to nTXEN High
(First Rising Edge on nPULSE2 after Last Bit Time)
nTXEN Low to first nPULSE1 Low**
RXIN Active Pulse Width
RXIN Period
RXIN Inactive Pulse Width
x T
(These signals are to and from the differential driver or the cable)
DR
t1
DR
DR
/4
DR
Figure 8.14 - Backplane Mode Transmit or Receive Timing
DR
+/- 50 nS
+/- 50 nS
/2
t9
t4
t10
Parameter
DATASHEET
t11
t2
t5
Page 72
t12
t7
t3
t6
10 Mbps ARCNET (ANSI 878.1) Controller with 2Kx8 On-Chip RAM
(400 nS BIT TIME)
min
-25
650
-25
450
-25
10
20
LAST BIT
200*
400*
200*
400*
100*
100*
200*
typ
t13
max
750
550
50
50
50
units
nS
nS
nS
nS
nS
nS
nS
nS
nS
nS
nS
nS
nS
t8
SMSC COM20022I
Datasheet