MC145026DR2 Freescale Semiconductor, MC145026DR2 Datasheet - Page 9

• 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

R 1 , C 1
Resistor 1, Capacitor 1 (Pins 6, 7)
and capacitor that are used to determine whether a narrow
pulse or wide pulse has been received. The time constant
R 1 x C 1 should be set to 1.72 encoder clock periods:
R 2 /C 2
Resistor 2/Capacitor 2 (Pin 10)
capacitor that are used to detect both the end of a received
word and the end of a transmission. The time constant R 2 x
C 2 should be 33.5 encoder clock periods (four data periods
per Figure 11): R 2 C 2 = 77 R TC C TC . This time constant is
used to determine whether the D in pin has remained low for
four data periods (end of transmission). A separate on–chip
comparator looks at the voltage–equivalent two data periods
(0.4 R 2 C 2 ) to detect the dead time between received words
within a transmission.
MOTOROLA
As shown in Figures 2 and 3, these pins accept a resistor
As shown in Figures 2 and 3, this pin accepts a resistor and
R 1 C 1 = 3.95 R TC C TC
MC145026 MC145027 MC145028 SC41343 SC41344
VT
Valid Transmission Output (Pin 11)
word of an encoding sequence when the following conditions
are satisfied:
input signal is received for four data periods.
V SS
Negative Power Supply (Pin 8)
ground.
V DD
Positive Power Supply (Pin 16)
This valid transmission output goes high after the second
VT remains high until either a mismatch is received or no
The most–negative supply potential. This pin is usually
The most–positive power supply pin.
1. the received addresses of both words match the local de-
2. the received data bits of both words match.
coder address, and
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