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LC72137M View Datasheet(PDF) - SANYO -> Panasonic

Part Name
Description
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LC72137M Datasheet PDF : 23 Pages
1 2 3 4 5 6 7 8 9 10 Next Last
Continued from preceding page.
Symbol
Pin No.
(MFP pin numbers
are in parentheses.)
Type
LC72137, 72137M
Functions
Circuit configuration
BO1
BO2
BO3
BO4
6 (5)
7 (6)
8 (7)
14 (13)
Output ports
• Dedicated outputs
• The output states are determined by the BO1 to BO5
bits in the serial data.
Data: 0 = open, 1= low
• A time base signal (8 Hz) can be output from the BO1
pin. (When the serial data TBC bit is set to 1.)
• I/O dual-use pins
• The direction (input or output) is determined by bits IOC1
and IOC2 in the serial data.
Data: 0 = input port, 1 = output port
• When specified for use as input ports:
The state of the input pin is transmitted to the controller
IO1
IO2
9 (8)
10 (9)
Input or output
ports
over the DO pin.
Input state: low = 0 data value
high = 1 data value
• When specified for use as output ports:
The output states are determined by the IO1 and IO2
bits in the serial data.
Data: 0 = open, 1 = low
• These pins function as input pins following a power on
reset.
• PLL charge pump output
When the frequency generated by dividing the local
PD
17 (16)
Charge pump
output
oscillator signal frequency by N is higher than the
reference frequency, a high level is output from the PD
pin. Similarly, when that frequency is lower, a low level is
output. The PD pin goes to the high-impedance state
when the frequencies match.
AIN
AOUT
18 (17)
19 (18)
LPF amplifier
transistor
connections
• The n-channel MOS transistor used for the PLL active
low-pass filter.
• Accepts an input in the frequency range 0.4 to 12 MHz.
• The input signal is directly transmitted to the IF counter.
IFIN
10 (9)
IF counter
• The result is output starting the MSB of the IF counter
using the DO pin.
• Four measurement periods are supported: 4, 8, 16, and
32 ms.
NC
1 (–)
22 (–)
NC Pin
• No connection
No. 5743-7/23
 

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