com20020-5 Standard Microsystems Corp., com20020-5 Datasheet - Page 16
com20020-5
Manufacturer Part Number
com20020-5
Description
Com20020-5 Ulanc Universal Local Area Network Controller With 2k X 8 On-board Ram
Manufacturer
Standard Microsystems Corp.
Datasheet
1.COM20020-5.pdf
(58 pages)
- Current page: 16 of 58
- Download datasheet (253Kb)
configuration recommended for applications like
car-area
applications
compatibility with existing ARCNET nodes and
do not require isolation.
The Differential Driver Configuration cannot
communicate directly with nodes utilizing the
Traditional Hybrid Configuration.
Backplane Configuration, the Differential Driver
Configuration does not isolate the node from the
media.
The Differential Driver interface includes a
RS485 Driver/Receiver to transfer the data
between the cable and the COM20020-5. The
nPULSE1 signal transmits the data, provided
the Transmit Enable signal is active.
nPULSE1 signal issues a 100nS negative pulse
to transmit a logic "1". Lack of pulse indicates a
logic "0". The RXIN signal receives the data. A
negative pulse on this input indicates a logic "1".
The
FIGURE 4 – COM20020-5 NETWORK USING RS-485 DIFFERENTIAL TRANSCEIVERS
75ALS176B
or Equiv.
RT
transmitter
networks
which
COM20020-5
or
do
portion
other
not
require
cost-sensitive
RBIAS
+VCC
of
Like the
direct
COM20020-5
The
the
16
COM20020-5 is disabled during reset and the
nPULSE1,
inactive.
Programmable TXEN Polarity
To accommodate transceivers with active high
ENABLE pins, the COM20020-5 contains a
programmable TXEN output. To program the
TXEN pin for an active high pulse, the nPULSE2
pin should be connected to ground. To retain
the normal active low polarity, nPULSE2 should
be left open. The polarity determination is made
at power on reset and is valid only for Backplane
Mode operation.
remain grounded at all times if an active high
polarity is desired.
Note: The COM20020-5 operates at a 5 Mbps
data rate which is not compatible with previous
ARCNET devices. The COM20020-5 should not
be used with the HYC9088 or HYC9068 media
interface hybrids.
+VCC
RBIAS
nPULSE2 and nTXEN pins are
COM20020-5
The nPULSE2
+VCC
RBIAS
pin should
RT
Related parts for com20020-5
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
Interface, Integrated USB2.0 Compatible 3-Port Hub
Manufacturer:
Standard Microsystems Corp.
Datasheet:
Part Number:
Description:
Lan91c100fd Rev. B Feast Fast Ethernet Controller With Full Duplex Capability
Manufacturer:
Standard Microsystems Corp.
Datasheet:
Part Number:
Description:
Feast ? Ast Ethernet Controller
Manufacturer:
Standard Microsystems Corp.
Datasheet:
Part Number:
Description:
Com20022i 10 Mbps Arcnet Ansi 878.1 Controller With 2k X 8 On-chip Ram
Manufacturer:
Standard Microsystems Corp.
Part Number:
Description:
Lpc47n207 Lpc Super I/o Irda Hot Docking Chip With Uart Data Brief
Manufacturer:
Standard Microsystems Corp.
Datasheet:
Part Number:
Description:
Advanced I/o With X-bus Interface
Manufacturer:
Standard Microsystems Corp.
Datasheet:
Part Number:
Description:
Fdc37m707 Enhanced Super I/o Controller With Wake-up Features
Manufacturer:
Standard Microsystems Corp.
Datasheet:
Part Number:
Description:
Twenty Pin Uart Tpuart Corporation
Manufacturer:
Standard Microsystems Corp.
Datasheet:
Part Number:
Description:
Enhanced Small Device Interface Controller
Manufacturer:
Standard Microsystems Corp.
Part Number:
Description:
Rpm-based Pwm Fan Controller
Manufacturer:
Standard Microsystems Corp.
Datasheet:
Part Number:
Description:
Rpm-based Pwm Fan Controller
Manufacturer:
Standard Microsystems Corp.
Datasheet:
Part Number:
Description:
Emc1001 1.5?c Smbus Temperature Sensor In Miniature Sot-23
Manufacturer:
Standard Microsystems Corp.
Datasheet:
Part Number:
Description:
1 Degree C Triple Temperature Sensor With Beta Compensation And Hotter Of Two Zones
Manufacturer:
Standard Microsystems Corp.
Datasheet:
Part Number:
Description:
1 Degree C Multiple Temperature Sensor With Beta Compensation And Hottest Of Thermal Zones
Manufacturer:
Standard Microsystems Corp.
Datasheet:
Part Number:
Description:
1 Degree C Triple Temperature Sensor With Resistance Error Correction & Hotter Of Two Zones
Manufacturer:
Standard Microsystems Corp.
Datasheet: