AMIS49587C5871RG ON Semiconductor, AMIS49587C5871RG Datasheet - Page 19

• Manufacturer Part Number: AMIS49587C5871RG
• Description: IC MODEM PLC 50/60MHZ 28PLCC
• Manufacturer: ON Semiconductor

Specifications of AMIS49587C5871RG

• Baud Rates: Selectable
• Interface: SCI
• Voltage - Supply: 3 V ~ 3.6 V
• Mounting Type: Surface Mount
• Package / Case: 28-PLCC
• Number Of Transmitters: 1
• Power Supply Requirement: Single
• Package Type: PLCC
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 28
• Operating Temperature (max): 70C
• Dual Supply Voltage (typ): Not RequiredV
• Dual Supply Voltage (max): Not RequiredV
• Dual Supply Voltage (min): Not RequiredV
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Data Format: -
• Lead Free Status / Rohs Status: Compliant

input is lower than the falling threshold level and a logic one
when the input is higher than the rising threshold level. The
6.1.2 50/60 Hz PLL
for a PLL. The PLL generates the clock CHIP_CLK which
is 8 times the bit rate and which is in phase with the rising
edge crossings. The PLL locks on the zero crossing from
negative to positive phase. The bit rate is always an even
multiple of the mains frequency, so following combinations
are possible:
The zero crossing detector output is logic zero when the
The output of the zero crossing detector is used as an input
MAINS
FROM
1 M Ω
ZeroCross
VIR
VIF
Figure 13. Zero Cross Detector Signals and Timing (Example for 50 Hz)
V
M50HZIN
M50HZIN
MAINS
3V3_A
Figure 12. Zero Cross Detector with Falling Edge Debouncer
M50Hz_IN
t
ZCD
http://onsemi.com
10 ms
19
falling edges of the output of the zero crossing detector are
de- -bounced by a period between 0.5 ms and 1 ms. The
Rising edges are not de- -bounced.
internal timers in order to maintain the CHIP_CLK timing.
Table 22. CHIP_CLK IN FUNCTION OF SELECTED
BAUD RATE AND MAINS FREQUENCY
In case no zero crossings are detected the PLL freezes its
BAUD[1:0]
Debounce
00
01
10
11
00
01
10
11
Filter
t
MAINS_FREQ
DEBOUNCE
ZeroCross
50 Hz
60 Hz
t
Clock & Control
= 0,5 .. 1 ms
PLL
CHIP_CLK
Baudrate
1200
2400
1440
2880
300
600
360
720
CHIP_CLK
19200 Hz
23040 Hz
11520Hz
2400 Hz
4800 Hz
2880 Hz
5760 Hz
9600Hz