3–244
Motorola Sensor Device Data
For More Information On This Product,
Go to: www.freescale.com
The analog section of the system can be broken down into
two subsections. These sections are the power supply and the
amplification section. The power supply section consists of a
diode, used to protect the system from input voltage reversal,
and two fixed voltage regulators. The 5 volt regulator (U3) is
used to power the microprocessor and display. The 8 volt
regulator (U4) is used to power the pressure sensor, voltage
references and a voltage offset source.
The microprocessor section (U5) requires minimal support
hardware to function. The MC34064P–5 (U2) provides an
under voltage sense function and is used to reset the
microprocessor at system power–up. The 4.0 MHz crystal
(Y1) provides the external portion of the oscillator function for
clocking the microprocessor and providing a stable base for
timing functions.
Table 2. Parts List
Designators
Quant.
Description
Rating
Manufacturer
Part Number
C3, C4, C6
3
0.1
μ
F Ceramic Cap.
1
μ
F Ceramic Cap.
22 pF Ceramic Cap.
50 Vdc
Sprague
1C105Z5U104M050B
C1, C2, C5
3
50 Vdc
muRATA ERIE
RPE123Z5U105M050V
C7, C8
2
100 Vdc
Mepco/Centralab
CN15A220K
J1–J3, J8
3 OR 4
#22 or #24 AWG Tined Copper
As Required
J4–J7
1
Dual Row Straight 4 Pos.
Arranged On 0.1
″
Grid
AMP
87227–2
LCD1
1
Liquid Crystal Display
IEE
LCD5657
P1
1
Power Connector
Phoenix Contact
MKDS 1/2–3.81
R1
1
6.98K Ohm resistor 1%
R2
1
121 Ohm Resistor 1%
R3
1
200 Ohm Resistor 1%
R4, R11
2
4.7K Ohm Resistor
R7
1
340 Ohm Resistor 1%
R5, R6
2
2.0K Ohm Resistor 1%
R8
1
23.7 Ohm Resistor 1%
R9
1
976 Ohm Resistor 1%
R10
1
1K Ohm Resistor 1%
R12
1
3.32K Ohm Resistor 1%
R13
1
4.53K Ohm Resistor 1%
R14
1
402 Ohm Resistor 1%
R15
1
10 Meg Ohm Resistor
RP1
1
47K Ohm x 7 SIP Resistor 2%
CTS
770 Series
TP1
1
Test Point
Red
Components Corp.
TP–104–01–02
U1
1
Quad Operational Amplifier
Motorola
MC33274P
U2
1
Under Voltage Detector
Motorola
MC34064P–5
U3
1
5 Volt Fixed Voltage Regulator
Motorola
MC78L05ACP
U4
1
8 Volt Fixed Voltage Regulator
Motorola
MC78L08ACP
U5
1
Microprocessor
Motorola
Motorola
MC68HC705B5FN or
XC68HC705B5FN
1
Pressure Sensor
Motorola
MPX2xxxDP
Y1
1
Crystal (Low Profile)
4.0 MHz
CTS
ATS040SLV
No Designator
1
52 Pin PLCC Socket for U5
AMP
821–575–1
No Designator
4
Jumpers For J4 thru J7
Molex
15–29–1025
No Designator
1
Bare Printed Circuit Board
No Designator
4
Self Sticking Feet
Fastex
5033–01–00–5001
Note: All resistors are 1/4 W resistors with a tolerance of 5% unless otherwise noted.
Note:
All capacitors are 100 volt, ceramic capacitors with a tolerance of 10% unless otherwise noted.
F
Freescale Semiconductor, Inc.
n
.