HYC9088A_07 SMSC [SMSC Corporation], HYC9088A_07 Datasheet - Page 6

• Manufacturer Part Number: HYC9088A_07
• Description: ARCNET Twisted Pair and Coaxial Compatible High Impedance Transceiver HIT
• Manufacturer: SMSC [SMSC Corporation]

nPULSE 1
nPULSE 2
Proper Connection for Twisted Pair
Each twisted pair compatible ARCNET node would typically have
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.
Revision (02-16-07)
Wiring
Number of Twists/Foot
DC Resistance
Characteristic Impedance
Maximum Attenuation
Rx
DATA
PARAMETER
20
18
7
DIFFERENTIAL
THRESHOLD
AMPLIFIER
DETECTOR
DISABLE
VOLTAGE
DRIVER
FILTER,
AND
19
FIGURE 1 – HYC9088A INTERNAL BLOCK DIAGRAM
RG62
N/A
3.4 Ohms/1000 ft.
93 Ohms at 1 MHz
5.5 dB/1000 ft. at 5 MHz
Table 1 - Specifications for Cabling
VALUE FOR COAX
DATASHEET
FILTER
6
+5V GND -5V
4
3
Page 6
TRANSFORMER
ISOLATION
13
GND GND GND
Solid Copper 22, 24, or 26 AWG
2 min.
28.6 Ohms/1000 ft. max.
105 Ohms  20% at 1 MHz
16.0 dB/1000 ft. at 5 MHz
14
two RJ-11 modular connectors mounted on the
VALUE FOR TWISTED PAIR
17
12 PH-A/CENTER
11 PH-B/SHIELD
5
10
9
8
16
15
1
2
NC
NC
TPD
TPA
TPB
TPC
NC
NC
SMSC HYC9088A