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STU2071B1 View Datasheet(PDF) - STMicroelectronics

Part Name
Description
Manufacturer
STU2071B1
STMICROELECTRONICS
STMicroelectronics STMICROELECTRONICS
STU2071B1 Datasheet PDF : 18 Pages
1 2 3 4 5 6 7 8 9 10 Next Last
STU2071
PIN DESCRIPTION
Pin
Name
1
DVSS(input)
2
PFOFF(input)
3
LT(input)
4
TEST(input)
5
DISS(output)
6
RESETN(input)
7
DIN(input)
8
TSP(input)
9
10
11
12
13
14
15, 16, 17
18
19
20
21
22
23
24,25
26, 27
28
BURST(input)
FR(in/out)
DOUT(output)
CL(in/out)
RD1(output)
RD2(output)
S2,S1,S0
DVDD(input)
AVSS(input)
LOUT1(output)
AVDD(input)
AGND(input)
LOUT2(output)
LIN1,LIN2(input)
XTAL1,XTAL2(inputs)
CLS(output)
Function
Digital Ground.
Power feed off. PFOFF=HIGH is coded by the A-bit indication HI
accessible on DOUT. Active in LT mode only.
LT/NT mode selection.
Test Mode.
A bit channel driven pin. Active in LT mode only.
Hardware Reset.
Digital interface input.
Transmit single pulse. 1 KHz single pulse alternating positive and
negative polarity is transmitted.
Burst mode selection. Active in LT mode only.
8KHz Digital interface frame clock; input in LT and output in NT mode.
Digital interface output.
Digital interface bit clock; input in LT and output in NT mode.
Power feeder relay driver.
Power feeder relay driver.
Time slot pin strap (. Active in LT mode only.
5V +/-5% positive digital power supply.
Analog Ground.
Output to the line.
5V +/-5% positive analog power supply.
Analog Ground.
Output to the line.
Inputs from the line (UK0).
System clock input;nominal frequency is 15.36MHz.
Clock output synchronous to the line receive clock at 7.68MHz.
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
LT
BURST
S0
S1
S2
Value
1
0
0
0
0
In LT burst:
Pins
LT
BURST
S0
S1
S2
Value
1
1
time slot
time slot
time slot
In NT:
Pins
Value
LT
0
BURST
0
S0
0
S1
0
S2
1
Test pins should always be tied to GND
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