LC7185 PLL Frequency Synthesizer
This 27 MHz band, PLL frequency synthesizer LSI chip is designed specifically for CB transceivers. The specifications are suited for use in U.S.A.(FCC).
The LC7185-8750 incorporates PLL circuitry and a controller for CB applications on a single CMOS chip. The controller handles the PLL circuitry, frequency data ROM, channel preset/recall RAM, and LED display driver. It also supports channel scan, channel preset/recall, and emergency channel call.
Pin
Name
Description
1
SA
Display Segment a
2
SB
Display Segment b
3
SC
Display Segment c
4
SD
Display Segment d
5
SE
Display Segment e
6
SF
Display Segment f
7
SG
Display Segment g
8
D1
9
D2
10
KI1
Keyboard In 1
11
KI2
Keyboard In 2
12
KI3
Keyboard In 3
13
KI4
Keyboard In 4
14
KO1
Keyboard Out 1
15
KO2
Keyboard Out 2
16
KO3
Keyboard Out 3
17
BEEP
18
UL
19
XOUT
X-tal Out
20
XIN
X-tal In
21
Vss2
22
TEST
23
PIN
24
GND
Ground
25
INIT
26
HOLD
27
PD
28
Vss1
29
NC
No Connection
30
TX
Explanation of pin function terms
CB Radio Banner Exchange