7-segment display circuit

Circuit use SIPO ( CD4094 ) for control segment A to segment H
of 7-segment and use DECADE COUNTER ( CD4017 ) for scan
enable 7-segment (7- segment common cathode )


Timing chart of CD4017

4017 datasheet pdf

4094 datasheet pdf

2.5 V Voltage References IC

MCP1525 2.5 V Voltage References IC

Description
The Microchip Technology Inc. MCP1525/41 devices
are 2.5V and 4.096V precision voltage references that
use a combination of an advanced CMOS circuit
design and EPROM trimming to provide an initial
tolerance of ±1% (max.) and temperature stability of
±50 ppm/°C (max.). In addition to a low quiescent
current of 100 μA (max.) at 25°C, these devices offer a
clear advantage over the traditional Zener techniques
in terms of stability across time and temperature. The
output voltage is 2.5V for the MCP1525 and 4.096V for
the MCP1541. These devices are offered in SOT-23-3
and TO-92 packages, and are specified over theindustrial
temperature range of -40°C to +85°C.


Features
• Precision Voltage Reference
• Output Voltages: 2.5V and 4.096V
• Initial Accuracy: ±1% (max.)
• Temperature Drift: ±50 ppm/°C (max.)
• Output Current Drive: ±2 mA
• Maximum Input Current: 100 μA @ +25°C (max.)
• Packages: TO-92 and SOT-23-3
• Industrial Temperature Range: -40°C to +85°C


MCP1525 Datasheet pdf

Phase Locked Loop IC

LM565/LM565C Phase Locked Loop
General Description

The LM565 and LM565C are general purpose phase locked
loops containing a stable, highly linear voltage controlled oscillator
for low distortion FM demodulation, and a double balanced
phase detector with good carrier suppression. The
VCO frequency is set with an external resistor and capacitor,
and a tuning range of 10:1 can be obtained with the same
capacitor. The characteristics of the closed loop
system—bandwidth, response speed, capture and pull in
range—may be adjusted over a wide range with an external
resistor and capacitor. The loop may be broken between the
VCO and the phase detector for insertion of a digital frequency
divider to obtain frequency multiplication.

The LM565H is specified for operation over the −55°C to
+125°C military temperature range. The LM565CN is specified
for operation over the 0°C to +70°C temperature range.


LM565/LM565C Datasheet pdf