COM20019ILJP SMSC, COM20019ILJP Datasheet - Page 59

• Manufacturer Part Number: COM20019ILJP
• Description: Network Controller & Processor ICs ARCNET Contrllr
• Manufacturer: SMSC

Specifications of COM20019ILJP

• Product: Controller Area Network (CAN)
• Number Of Transceivers: 1
• Data Rate: 312.5 Kbps
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 4.5 V
• Supply Current (max): 20 mA
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Package / Case: PLCC-28
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

SMSC COM20019I 3.3V
Cost Competitive ARCNET (ANSI 878.1) Controller with 2K x 8 On-Chip RAM
Figure 8.10 - NON-MULTIPLEXED BUS, 80XX-LIKE CONTROL SIGNALS; WRITE CYCLE
CASE 2 is supported for TQFP Package ONLY
D0-D7
**
Note 3:
A0-A2
Note 1:
Note 2: Any cycle occurring after a write to the Address Pointer Low Register
*
***:
nWR
nRD
nCS
T
T
T
T
t1
t2
t3
t4
t5
t6
t7
t8
t9
t10
ARB
ARB
ARB
opr
be 30 nS measured from the later of nCS falling or Valid Data available.
nCS may become active after control becomes active, but the data setup time will now
is the period of operation clock. Same as the XTAL1 period.
is the Arbitration Clock Period
is identical to T
is twice T
The Microcontroller typically accesses the COM20019 on every other cycle.
Therefore, the cycle time specified in the microcontroller's datasheet
should be doubled when considering back-to-back COM20019 cycles.
requires a minimum of 4T
of the next nWR.
Write cycle for Address Pointer Low Register occurring after a write to Data
Register requires a minimum of 5T
leading edge of the next nWR.
Write cycle for Address Pointer Low Register occurring after a read from Data
Register requires a minimum of 5T
leading edge of nWR.
Address Setup to nWR Active
nCS Setup to WR Active
Cycle Time (nWR
Address Hold from nWR Inactive
nCS Hold from nWR Inactive
Valid Data Setup to nWR High
Data Hold from nWR High
nWR Low Width
nWR High Width
nRD
opr
to nWR Low
if SLOW ARB = 1
Parameter
Note 3
opr
t10
t1
if SLOW ARB = 0
t3
to Next
ARB
from the trailing edge of nWR to the leading edge
DATASHEET
ARB
ARB
)**
Page 59
VALID
from the trailing edge of nWR to the
from the trailing edge of nRD to the
t8
VALID DATA
4T
t6
30***
min
15
10
10
20
20
20
ARB
5
0
*
max
t7
t2
Note 2
t4
t9
t5**
units
nS
nS
nS
nS
nS
nS
nS
nS
nS
nS
t5
Rev. 11-07-08