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PDF DS2290 Data sheet ( Hoja de datos )
| Número de pieza | DS2290 | |
| Descripción | T1 Isolation Stik | |
| Fabricantes | Dallas Semiconductor | |
| Logotipo |  |
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DS2290
DS2290
T1 Isolation Stik
FEATURES
• Protected interface for connecting equipment to T1
lines
• Provides 800 volts of surge protection and 1500 volts
of isolation
• FCC Part 68 registered
• Meets TR 62411 and T1.403–1989 for transmit pulse
characteristics
• Line build outs of 0, –7.5, and –15 dB
• Companion to the DS2291 T1 Long Loop Stik
• Connects to a standard 30–pin single in–line connec-
tor
• Single +5V supply
• Compatible with the DS2180A and DS2141A T1
Tranceivers
PIN ASSIGNMENT
VDD
VDD
LCLK
LPOS
LNEG
TCLK
TPOS
TNEG
LB
NC
LB2
LB1
LB0
TAIS
B8ZS
NC
NC
NC
RX+
RX–
NC
GND
GND
NC
RXTIP
LPWR+
RXRING
TXTIP
LPWR–
TXRING
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
(ACTUAL SIZE)
DESCRIPTION
The DS2290 T1 Isolation Stik provides all the surge and
isolation protection that is necessary to connect a piece
of equipment to a T1 line. It offers a function similar to
that provided by a Data Access Arrangement (DAA)
when a modem is connected to a phone line. The
DS2290 is FCC Part 68 pre–registered so the user can
connect equipment to T1 lines without any further test-
ing or qualification. It contains onboard waveshaping
circuitry that creates transmit pulses meeting the latest
T1 specifications including TR 62411 (Accunet* T1.5
Service Description and Interface Specifications, – De-
cember 1990) and T1.403–1989 (Carrier to Carrier In-
stallation – DS1 Metallic Interface). Applications in-
clude Channel Service Units and similar equipment that
requires a fully protected interface.
* Service mark of AT&T Communications
022798 1/9
1 page  
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TYPICAL DS2290 APPLICATION Figure 4
LCLK
LPOS
LNEG
RX+
RX–
B8ZS
LB2
RECEIVE
T1 PAIR
RXTIP
RXRING
LPWR–
LPWR+
TXTIP
TXRING
TRANSMIT
T1 PAIR
TPOS
TNEG
TCLK
LB0
LB1
TAIS
LB
RX+
RX–
RCLK
RPOS
RNEG
B8ZS
BPV
PCS
DJA
RST
LCLK
LNEG
LPOS
LOCK RCLLB
DS2290
RCLK
RPOS
RNEG
RSER
TPOS
TNEG
TCLK
TSER
SERIAL
PORT
DS2250
SOFT MICROCONTROLLER Stik
NETWORK SIDE PIN DESCRIPTION Table 1
PIN SYMBOL I/O
DESCRIPTION
25 RXTIP
27 RXRING
I Receive Tip and Ring Inputs. Connects directly to the receive T1 twisted pair.
These inputs are transformer coupled and terminated at 100 ohms. See Figure
2.
28 TXTIP
30 TXRING
O Transmit Tip and Ring Outputs. Connects directly to the transmit T1 twisted
pair. Output signal level is programmable via the LB0 to LB2 pins. (See Table 3.)
26 LPWR+
29 LPWR–
– Loop Power Connections. These pins connect to the internal center–taps of
the transmit and receive transformers. They provide access to the DC power
on the T1 line (may not be provided by carriers in the future). Tie together if no
simplex power arrangement is needed.
022798 5/9
5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet DS2290.PDF ] | |
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