SMSC HYC9088A Arcnet twisted pair and coaxial compatible high impedance transceiver hit Datasheet

HYC9088A
ARCNET® Twisted Pair and Coaxial Compatible
High Impedance Transceiver HIT™
FEATURES
•
•
•
•
ARCNET on Twisted Pair or Coaxial Cable
Drives Shielded and Unshielded Twisted Pair Cable
or Coaxial Cable
Compatible with Existing ARCNET Installations
2.5 Mbps operation
•
•
•
•
•
Supports Star, Bus, and Daisy Chained
Configurations
Enhanced Built-in Filters for Reduced EMI
Twenty Pin Single In-Line Package
Straight or Right Angle Lead Frame
New Reduced Size
GENERAL DESCRIPTION
The HYC9088A Twisted Pair and Coaxial Compatible High Impedance Transceiver (HIT) is a hybrid module that
interfaces an ARCNET Local Area Network controller to one twisted pair or coaxial cable. The HIT interfaces directly with
Standard Microsystems Corporation's ARCNET LAN controllers operating at 2.5 Mbps and connects to a variety of
shielded and unshielded twisted pair or coaxial cables via an on-board transformer. The network topologies supported by
the HIT are daisy chain, star, and bus configurations.
During data transmission, the HIT converts the digital pulse information provided by the ARCNET LAN controller into
analog signals and drives them onto the cable. The transmitted signals are filtered to eliminate undesirable frequencies.
The receiver section of the HYC9088 identifies dipulse signals on the cable and converts them into TTL signals to be
supplied to the ARCNET LAN controller.
The HIT supports ARCNET's Dipulse Encoding Scheme and, is 100% compatible with all existing coax-based ARCNET
networks. This provides an ARCNET network designer with flexibility to easily combine coax and twisted pair cabling.
ORDERING INFORMATION
Order Number(s):
HYC9088A R for right angle lead frame leaded package
HYC9088A R-LF for right angle lead frame lead-free RoHS compliant package
Revision (02-16-07)
SMSC HYC9088A
DATASHEET
80 ARKAY DRIVE, HAUPPAUGE, NY 11788 (631) 435-6000, FAX (631) 273-3123
Copyright © 2007 SMSC or its subsidiaries. All rights reserved.
Circuit diagrams and other information relating to SMSC products are included as a means of illustrating typical applications. Consequently, complete
information sufficient for construction purposes is not necessarily given. Although the information has been checked and is believed to be accurate, no
responsibility is assumed for inaccuracies. SMSC reserves the right to make changes to specifications and product descriptions at any time without
notice. Contact your local SMSC sales office to obtain the latest specifications before placing your product order. The provision of this information
does not convey to the purchaser of the described semiconductor devices any licenses under any patent rights or other intellectual property rights of
SMSC or others. All sales are expressly conditional on your agreement to the terms and conditions of the most recently dated version of SMSC's
standard Terms of Sale Agreement dated before the date of your order (the "Terms of Sale Agreement"). The product may contain design defects or
errors known as anomalies which may cause the product's functions 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 where product failure
could cause or contribute to personal injury or severe property damage. Any and all such uses without prior written approval of an Officer of SMSC
and further testing and/or modification will be fully at the risk of the customer. Copies of this document or other SMSC literature, as well as the Terms
of Sale Agreement, may be obtained by visiting SMSC’s website at http://www.smsc.com. SMSC is a registered trademark of Standard Microsystems
Corporation (“SMSC”). Product names and company names are the trademarks of their respective holders.
SMSC DISCLAIMS AND EXCLUDES ANY AND ALL WARRANTIES, INCLUDING WITHOUT LIMITATION ANY AND ALL IMPLIED WARRANTIES
OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, TITLE, AND AGAINST INFRINGEMENT AND THE LIKE, AND ANY AND
ALL WARRANTIES ARISING FROM ANY COURSE OF DEALING OR USAGE OF TRADE. IN NO EVENT SHALL SMSC BE LIABLE FOR ANY
DIRECT, INCIDENTAL, INDIRECT, SPECIAL, PUNITIVE, OR CONSEQUENTIAL DAMAGES; OR FOR LOST DATA, PROFITS, SAVINGS OR
REVENUES OF ANY KIND; REGARDLESS OF THE FORM OF ACTION, WHETHER BASED ON CONTRACT; TORT; NEGLIGENCE OF SMSC
OR OTHERS; STRICT LIABILITY; BREACH OF WARRANTY; OR OTHERWISE; WHETHER OR NOT ANY REMEDY OF BUYER IS HELD TO
HAVE FAILED OF ITS ESSENTIAL PURPOSE, AND WHETHER OR NOT SMSC HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
DAMAGES.
Revision (02-16-07)
Page 2
DATASHEET
SMSC HYC9088A
PIN CONFIGURATION
Pin 1 Designator
T
O
P
V
I
E
W
1
NC
2
NC
3
VDD
4
GND
5
NC
6
VCC
7
R
8
TPA
9
NC
10
TPD
11
PH-B/SHIELD
12
PH-A/CENTER
13
GND
14
GND
15
TPC
16
TPB
17
GND
18
nPULSE2
19
DISABLE
20
nPULSE1
PACKAGE: 20-Pin SIP
Revision (02-16-07)
Page 3
DATASHEET
SMSC HYC9088A
DESCRIPTION OF PIN FUNCTIONS
PIN NO.
NAME
1, 2, 5, 9
No Connect
NC
Not used. Make no connection to these pins.
3
Power
Supply
VDD
-5 Volts power supply.
4, 13, 14,
17
Ground
GND
Ground.
6
Power
Supply
VCC
+5 Volts power supply.
7
Receive
Data
RX
Output. This signal carries the TTL receive pulse information
to the ARCNET LAN Controller Device.
Test Points
TPA, TPB,
TPC, TPD
Test points. Make no connection to these pins.
11
Phase-B/
Shield
PH-B/
SHIELD
Output. Connect this signal to Twisted Pair Connector pin 3 or
the shield of the coaxial cable.
12
Phase-A/
Center
PH-A/
CENTER
Output. Connect this signal to Twisted Pair Connector pin 2 or
the center of the coaxial cable.
18
nPulse 2
nPULSE2
Input. This signal is supplied by the ARCNET LAN Controller
Device.
19
Disable TX
DISABLE
TRANSMIT
Input. A high level on this signal disables the transmit section
of the HYC9088. It is normally connected to ground.
20
nPulse 1
nPULSE1
Input. This signal is supplied by the ARCNET LAN Controller
Device.
8, 16, 15,
10
Revision (02-16-07)
SYMBOL
DESCRIPTION
Page 4
DATASHEET
SMSC HYC9088A
FUNCTIONAL DESCRIPTION
The HYC9088A HIT integrates a host of discrete components into a hybrid module and provides the Local Area Network
designer with space and cost savings as well as the enhanced reliability of a single component. Since the HIT is a high
impedance transceiver, it does not disturb the characteristic impedance of the cable used to interconnect ARCNET
nodes. The two far ends of the twisted pair cable must be terminated using terminating resistors equal to the
characteristic impedance of the cable. The HIT is made up of a transmit section and a receive section. (Please refer to
Figure 1).
Transmit Section
The ARCNET LAN controller transmits a logic "1" by generating two 100 ns non-overlapping negative pulses, nPULSE1
and nPULSE2. These signals are converted by the HIT into a 200 ns dipulse signal. The HIT shapes the 200 ns signal
into a single cycle of a 5 MHz sine-wave and filters higher frequency components. The dipulse signal is then transformercoupled onto the cable and has a minimum voltage output of 16 Volts peak-to-peak. The exact output voltage of the HIT
will vary depending on the characteristic impedance of the cable used. The driving circuitry of the HIT has been designed
to present a high impedance on the cable in order to minimize loading.
The DISABLE input of the HYC9088 can be used to prevent the device from transmitting. During normal operation, the
DISABLE input is tied to ground.
Receiver Section
The received dipulse signal from the cable is electrically isolated through the use of a transformer. This signal is passed
through a filter which eliminates out of band noise. The receive signal is then fed to a comparator which converts it into a
TTL signal ready to be applied to the LAN controller chip. The comparator compares the received signal to an internal
voltage threshold to distinguish noise from real signal.
APPLICATION INFORMATION
Small Twisted Pair Networks
The HIT eliminates the need for active hubs in small ARCNET networks. For example, a ten node ARCNET network can
be constructed by connecting ten HITs using a daisy-chained or bus configuration (see Figure 2). Note that both
extremes of the cable must be terminated with a resistor which matches the characteristic impedence of the Twisted Pair
Cable. For the cable types specified in Table 1, the maximum length of the twisted pair cable recommended is 400 feet.
Small Coax Network
No active hub is required for an ARCNET network consisting of eight nodes or less using the HYC9088 for coax cable
(See Figure 2A). Both ends of the cable must be terminated with a resistor which matches the characteristic impedance
of the coax cable. For the RG62 cable specified in Table 1, the maximum length of the coax cable recommended is 1000
feet.
Combination of Twisted Pair and Coax
Networks
A Two-Port Link is used to combine twisted pair network and a coax network. A Two-Port Link has a coax connector on
one side and two modular jacks on the other and contains the proper impedance-matching circuitry. Refer to Figure 3 for
an illustration of a twisted pair network combined with a coaxial network.
Revision (02-16-07)
Page 5
DATASHEET
SMSC HYC9088A
Proper Connection for Twisted Pair
Each twisted pair compatible ARCNET node would typically have two RJ-11 modular connectors mounted on the
node card (refer to Figure 4). PHASE A should be connected to pin 2 of the connectors and PHASE B to pin 3. A
twisted pair segment would have an RJ-11 modular jack on each end (see Figure 5). Please note that the suggested
numbering scheme of the modular jack shown in Figure 5 may not be consistent with that found on some manufacturers'
products. Please ensure consistent connection of Phase A and Phase B signals throughout the network to avoid the
reception of erroneous data.
Table 1 - Specifications for Cabling
VALUE FOR COAX
VALUE FOR TWISTED PAIR
PARAMETER
Wiring
RG62
Solid Copper 22, 24, or 26 AWG
Number of Twists/Foot
N/A
2 min.
DC Resistance
3.4 Ohms/1000 ft.
28.6 Ohms/1000 ft. max.
Characteristic Impedance
93 Ohms at 1 MHz
105 Ohms  20% at 1 MHz
Maximum Attenuation
5.5 dB/1000 ft. at 5 MHz
16.0 dB/1000 ft. at 5 MHz
DISABLE
19
ISOLATION
TRANSFORMER
nPULSE 1
nPULSE 2
20
18
1
NC
2
NC
FILTER,
AMPLIFIER
AND
DIFFERENTIAL
DRIVER
5
9
NC
NC
12 PH-A/CENTER
11 PH-B/SHIELD
8
Rx
DATA
7
VOLTAGE
THRESHOLD
DETECTOR
16
FILTER
15
10
6
4
3
+5V GND -5V
13
14
TPA
TPB
TPC
TPD
17
GND GND GND
FIGURE 1 – HYC9088A INTERNAL BLOCK DIAGRAM
Revision (02-16-07)
Page 6
DATASHEET
SMSC HYC9088A
400 FEET MAXIMUM
T
T
6 FEET
MINIMUM
1
2
3
10
FIGURE 2 – TYPICAL SMALL TWISTED PAIR ARCNET NETWORK USING HYC9088A
1000 FEET MAXIMUM
3 FEET
MINIMUM
T
T
1
2
3
8
FIGURE 2A – TYPICAL SMALL COAX ARCNET NETWORK USING HYC9088A
400 FEET MAXIMUM
TWISTED PAIR CABLE
T
T
6 FEET
MINIMUM
1
2
3
9
10TH CONNECTION
TWOPORT
LINK
COAXIAL CABLE*
3 FEET
MINIMUM
T
T
8TH CONNECTION
d**
1
2
3
7
1000 FEET MAXIMUM
*For more detail, see TN 7-1
**Stub length should be kept as short as possible
FIGURE 3 – TYPICAL COMBINATION OF TWISTED PAIR AND COAXIAL CABLE ON AN ARCNET NETWORK
USING HYC9088A
Revision (02-16-07)
Page 7
DATASHEET
SMSC HYC9088A
ARCNET NODE
4-Lead Modular Plugs
FIGURE 4 – RJ-11 CONNECTORS ON NODE CARD
1 2 3 4*
3
1 2 3 4*
3
2
2
4
3
2
4
3
2
1*
1*
*Please note that the numbering scheme of the modular jack shown above is the
opposite of that found on Standard Microsystems' Systems Products Division's boards
and hubs. Please adhere to one scheme and ensure consistent connection of Phase
A and Phase B signals throughout the network for proper operation.
FIGURE 5 – PHASE RELATIONSHIP ON TWISTED PAIR SEGMENT AND RJ-11 CONNECTOR PINOUT
Revision (02-16-07)
Page 8
DATASHEET
SMSC HYC9088A
+5V
0.47
pF
+
10
uF
5.6K
J1*
1/2W
6
5.6K
nPULSE1
nPULSE1
nPULSE2
CONTROLLER/
TRANSCEIVER RXIN
nPULSE2
ARCNET
HYC9088A
4,13,14
17,19
0.47
pF
1/2W
PHASE 11
B/SHIELD
5.6K
1
2
27
pF
1
2
3
4
3
4
PHASE
A/CENTER
RX
GND
12
27
pF
1/2W
3
5.6K
+
10
uF
J2*
1/2W
-5V
*Please see note in Figure 5 regarding the numbering scheme of the modular jack.
FIGURE 6 – TYPICAL HYC9088A INTERCONNECT FOR TWISTED PAIR CABLE
+5V
0.47
pF
+
10
uF
6
nPULSE1
ARCNET
nPULSE2
CONTROLLER/
TRANSCEIVER RXIN
GND
nPULSE1
HYC9088A
12
PHASE
A/CENTER
nPULSE2
RX
PHASE 11
B/SHIELD
4,13,14
17,19
0.47
pF
5.6K
1/2W
3
5.6K
+
10
uF
0.01
uF
1KV
1/2W
-5V
FIGURE 7 – TYPICAL HYC9088A INTERCONNECT FOR COAXIAL CABLE
COAXIAL CABLE
TWISTED PAIR CABLE
12
12
PHASE
A/CENTER
PHASE
A/CENTER
R
L
R
L
TO RJ
11
PHASE 11
B/SHIELD
PHASE 11
B/SHIELD
FIGURE 8 – DESCRIPTION OF TERMINATOR WIRING
Revision (02-16-07)
Page 9
DATASHEET
SMSC HYC9088A
OPERATIONAL DESCRIPTION
MAXIMUM GUARANTEED RATINGS*
o
o
Operating Temperature Range.....................................................................................................0 C to +70 C
o
Storage Temperature Range ..................................................................................................... -55 to +150oC
Lead Temperature Range (soldering, 10 seconds) ...............................................................................+325oC
Positive Voltage on any pin, with respect to Ground ...........................................................................Vcc+0.3V
Negative Voltage on any pin, except VDD, with respect to Ground ........................................................... -0.3V
*Stresses above those listed above could cause permanent damage to the device. This is a stress rating only and
functional operation of the device at any other condition above those indicated in the operation sections of this
specification is not implied.
Note: When powering this device from laboratory or system power supplies, it is important that the Absolute Maximum
Ratings not be exceeded or device failure can result. Some power supplies exhibit voltage spikes on their outputs when
the AC power is switched 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.
DC ELECTRICAL CHARACTERISTICS (TA = 0oC to 70oC, VCC2 = +5.0 V ± 5%, VDD = -5.0V ± 5%)
PARAMETER
SYMBOL
MIN
TYP
MAX
UNITS
COMMENTS
Low Input Voltage
VIL
0.8
V
IIL = -0.8 mA
High Input Voltage
VIH
2.0
V
IIH = +0.2 mA
Received Signal Amplitude
VR
6.0
3.0
Vp-p
Vo-p
Low Output Voltage
VOL
High Output Voltage
VOH
2.4
Transformer Output
VT
16
8
Cable Noise Amplitude
VC
VCC Supply Current
ICC
VDD Supply Current
Pulse Width, nPulse 1, n2
0.4
20
10
V
One TTL Load
V
One TTL Load
Vp-p
VO-p
4
Vp-p
190
285
mA
IDD
180
270
mA
PW
100
Zchr cable = 120Ω or
93Ω
nS
Shorting the transformer output may cause permanent damage to the device.
Revision (02-16-07)
Page 10
DATASHEET
SMSC HYC9088A
HYC9088AR for Right Angle Lead Frame
HYC9088AS for Straight Lead Frame
HYC9088AS
HYC9088AR
H
H
A
HYC9088A
90°-105°
B
1
F
SEATING PLANE
G
J
K
DIM
A
B
C
D
E
F
G
H
I
J
K
MIN
2.000
0.625
0.055
0.018
D
TYP
C
G
MAX
2.100
0.650
0.095
0.022
SEATING PLANE
I
E
0.100
0.135
0.120
0.010
0.400
0.085
0.070
0.180
0.020
NOTE: Dimensions are in inches
FIGURE 9 – 20 PIN SIP PACKAGE DIMENSIONS
Revision (02-16-07)
Page 11
DATASHEET
SMSC HYC9088A
Similar pages