MC14549BCP ON Semiconductor, MC14549BCP Datasheet - Page 7

• Manufacturer Part Number: MC14549BCP
• Manufacturer: ON Semiconductor

Specifications of MC14549BCP

• Logic Family: 4000
• Logical Function: Succ Approx Reg
• Number Of Elements: 1
• Number Of Bits: 8
• Number Of Inputs: 1
• Number Of Outputs: 8
• High Level Output Current: -4.2mA
• Low Level Output Current: 4.2mA
• Package Type: PDIP
• Propagation Delay Time: 1000ns
• Operating Supply Voltage (typ): 3.3/5/9/12/15V
• Operating Supply Voltage (max): 18V
• Operating Supply Voltage (min): 3V
• Output Type: Standard
• Clock-edge Trigger Type: Positive-Edge
• Polarity: Non-Inverting
• Technology: CMOS
• Frequency (max): 4(Typ)MHz
• Mounting: Through Hole
• Pin Count: 16
• Operating Temp Range: -55C to 125C
• Operating Temperature Classification: Military
• Quiescent Current: 20uA
• Lead Free Status / Rohs Status: Not Compliant

Externally Controlled 12−Bit ADC (Figure 5)
simultaneously resets the cascaded second SAR. When Q4 of
the first SAR goes high, the second SAR starts conversion,
and the first one stops conversion. EOC indicates that the
parallel data are valid and that the serial output is complete.
Updating the output data is started with every external control
pulse.
In this circuit the external pulse starts the first SAR and
SC
Q7 Q6 Q5
TO DAC
SC
Q7 Q6 Q5
TO DAC
Q4 Q3 Q2 Q1 Q0
MC14559B
C
Q4 Q3 Q2 Q1 Q0
MC14559B
Figure 4. Continuously Cycling 12−Bit ADC
Figure 5. Externally Controlled 12−Bit ADC
C
FF
S
MC14549B, MC14559B
out
EOC
FF
S
http://onsemi.com
out
EOC
SC
MR
Q7 Q6 Q5
7
SC
MR
Additional Motorola Parts for Successive
Approximation ADC
MC1408/1508 converter has eight−bit resolution and is
available
amplifier−comparator block — The MC1407/1507
contains a high speed operational amplifier and a high speed
comparator with adjustable window.
SA−ADCs with an accuracy of up to eight bits, using as the
register one MC14549B or one MC14559B. An additional
CMOS block will be necessary to generate the clock
frequency.
is found in Motorola Application Note AN−716.
Q7 Q6 Q5
Monolithic digital−to−analog converters — The
With these two linear parts it is possible to construct
Additional information on successive approximation ADC
TO DAC
MC14549B
Q4 Q3 Q2 Q1 Q0 EOC
C
TO DAC
MC14549B
Q4 Q3 Q2 Q1 Q0 EOC
with
C
EOC
6,
S
out
7,
EOC
S
out
and
S
out
8−bit
S
out
accuracy.
The