U6057B Datasheet, PDF (2/9 Pages) TEMIC Semiconductors – Receiver for Point-to-Point Multiplex Systems

U6057B
Pin Configuration
Table 1. Pin description
Pin Symbol
Function
1
GND Ground
2
DIN Serial data input
3
nc
4
P/S Parallel/serial switch-over
5
CLK Clock input for shift register
6
nc
7
m DOUT Serial data output for the C
8
nc
9
2/4 2/4-fold comparison
10
SYN Synchronization
11
CO Clock output for cascading
12
PP Program pin
13
DT Data input of data line
14
nc
15
nc
16
nc
17
nc
18
OCS RC-oscillator input
19
V_stab Stabilized voltage
20
V_S Supply voltage
GND 1
DIN 2
nc
3
P/S 4
CLK 5
nc
6
DOUT ₇
nc 8
2/4 9
SYN ₁₀
20 V_S
19 V_Stab
18 OSC
17 nc
16 nc
U6057B
15 nc
14 nc
13 DT
12 PP
11 CO
13272
Figure 2. Pinning of U6057B
Functional Description
Power Supply
For protection against interference and surges, the
U6057B must be equipped with an RC-circuit for current
limitation in the event of overvoltages and for buffering
in the event of voltage dips at V_S.
W m Suggested dimensions: Rv = 510 , C_V = 100 F
(see figure 3 )
An integrated 14-V Z-diode is located between V_S and
GND.
Oscillator
All timing in the circuit is derived from an RC-oscillator.
The oscillator’s charging time t₁ is determined by an
W ^{external resistor, ROSC, and its discharge time t2 by an}
integrated 2-k resistor. Since the tolerance and
temperature sensitivity of the integrated resistor are
considerable greater than those of the external resistor,
W ^{t1/t2 ≥ 20 must be selected for stability reasons. The}
minimum value of R_OSC should not be less than 68 k .
Recommended frequencies and dimensioning:
W f_OSC = 1 / C_OSC (0.79 R_OSC + 2260 )
W f_OSC = 25.6 kHz, C_OSC = 220 pF, R_OSC = 200 k
Table 2. Times derived from the transmitted frequency
(6.4 kHz)
Description
Start pulse
One bit
Information bit
Zero bit
Information unit
Data word
Data pause
Transmission cycle
Minimum reaction time
Data word master – slave
Data pause master – slave
Time
312 ms
156 ms
156 ms
156 ms
625 ms
m 5 ms + 312 s start bit
9.688 ms
15 ms
60 ms
m 10 ms + 312 s start bit
4.688 ms
2 (9)
TELEFUNKEN Semiconductors
Preliminary Information
Rev. A1, 03-Dec-97