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STU2071FN Scheda tecnica(PDF) 3 Page - STMicroelectronics

Il numero della parte STU2071FN
Spiegazioni elettronici  4B3T U INTERFACE CIRCUIT
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Produttore elettronici  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

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APPLICATION AND MODES
The UIC can be used in LT, LT-burst and in NT
mode.
Hereafter a list of the pin bias to set up the de-
sired mode is given.
In LT mode:
Pins
Value
LT
BURST
S0
S1
S2
1
0
0
0
0
In LT burst:
Pins
Value
LT
BURST
S0
S1
S2
1
1
time slot
time slot
time slot
In NT:
Pins
Value
LT
BURST
S0
S1
S2
0
0
0
0
1
Test pins should always be tied to GND
PIN DESCRIPTION
Pin
Name
Function
1
DVSS(input)
Digital Ground.
2
PFOFF(input)
Power feed off. PFOFF=HIGH is coded by the A-bit indication HI
accessible on DOUT. Active in LT mode only.
3
LT(input)
LT/NT mode selection.
4
TEST(input)
Test Mode.
5
DISS(output)
A bit channel driven pin. Active in LT mode only.
6
RESETN(input)
Hardware Reset.
7
DIN(input)
Digital interface input.
8
TSP(input)
Transmit single pulse. 1 KHz single pulse alternating positive and
negative polarity is transmitted.
9
BURST(input)
Burst mode selection. Active in LT mode only.
10
FR(in/out)
8KHz Digital interface frame clock; input in LT and output in NT mode.
11
DOUT(output)
Digital interface output.
12
CL(in/out)
Digital interface bit clock; input in LT and output in NT mode.
13
RD1(output)
Power feeder relay driver.
14
RD2(output)
Power feeder relay driver.
15, 16, 17
S2,S1,S0
Time slot pin strap (. Active in LT mode only.
18
DVDD(input)
5V +/-5% positive digital power supply.
19
AVSS(input)
Analog Ground.
20
LOUT1(output)
Output to the line.
21
AVDD(input)
5V +/-5% positive analog power supply.
22
AGND(input)
Analog Ground.
23
LOUT2(output)
Output to the line.
24,25
LIN1,LIN2(input)
Inputs from the line (UK0).
26, 27
XTAL1,XTAL2(inputs)
System clock input;nominal frequency is 15.36MHz.
28
CLS(output)
Clock output synchronous to the line receive clock at 7.68MHz.
STU2071
3/18


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