MC145026DR2 Freescale Semiconductor, MC145026DR2 Datasheet - Page 10

• Manufacturer Part Number: MC145026DR2
• Description: IC ENCODER 9 LINE SMPLX 16-SOIC
• Manufacturer: Freescale Semiconductor
• Series: 4000r
• Type: Encoder, Decoderr

Specifications of MC145026DR2

• Applications: Remote Control
• Voltage - Supply, Analog: 2.5 V ~ 18 V
• Voltage - Supply, Digital: 2.5 V ~ 18 V
• Mounting Type: Surface Mount
• Package / Case: 16-SOIC (0.300", 7.5mm Width)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: MC145026DTR

MC145026 MC145027 MC145028 SC41343 SC41344
10
OSCILLATOR
external RC network; i.e.,
ENCODER
This oscillator operates at a frequency determined by the
(PIN 12)
(PIN 15)
D out
TE
where: C TC = C TC + C layout + 12 pF
DATA OUTPUTS
f
for 1 kHz
R S
R S
R TC
400 pF < C TC < 15 F
(PIN 11)
2.3 R TC C TC
PW min
2 R TC
20 k
VT
10 k
1
f
400 kHz
11
(Hz)
DIGIT
HIGH
1ST
Figure 9. Encoder Oscillator Information
INTERNAL
1ST WORD
ENABLE
R S
Figure 10. Timing Diagram
OPEN
ENCODING SEQUENCE
ENCODER
DECODER
that current through R S is insignificant compared to current through R TC . The
upper limit for R S must ensure that R S x 5 pF (input capacitance) is small com-
pared to R TC x C TC .
The minimum recommended oscillation frequency of this circuit is 1 kHz. Sus-
ceptibility to externally induced noise signals may occur for frequencies below
1 kHz and/or when resistors utilized are greater than 1 M .
The value for R S should be chosen to be 2 times R TC . This range ensures
For frequencies outside the indicated range, the formula is less accurate.
DIGIT
LOW
9TH
C TC
12
R TC
DIGIT
1ST
13
2ND WORD
DIGIT
9TH
CONTINUOUS TRANSMISSION
2 WORD TRANSMISSION
1.1 (R 2 C 2 )
MOTOROLA