Onwa K6122 Schematic

Pin Assignment

Block Diagram

LC7185-8750

No. 3356-3/12

LC7185-8750

Pin Descriptions

TX Transmit/receive select PD Charge pump output
HOLD
INIT
TEST Test point (input) D1, D2 Digit output (for display)
V
PIN Programmable divider input KO1 to KO3 Key scan outputs
XIN, XOUT Crystal oscillator input, output

UL

1, VSS2 Power supply KI1 to KI4 Key inputs

DD,VSS

Key Matrix

Hold mode select NC NC pin
Initial input SA to SG Segment driver (for display)

BEEP Beep-tone control output

(10.240 MHz)
Unlock detection signal output

CH9 Emergency CH9 recall ME Station Memory Enable
CH19 Emergency CH19 recall M1 to M5 Station Memory recall
PA Public announcement display UP/DN/ME/M1 to 5 Momentary SW
MODE 1/2 Display Mode CH9/CH19/PA Slide SW
UP CH up/scan MODE 1/2 Diode
DN CH down/scan

LED Display Configuration (Common anode/7 segment)

No. 3356-4/12

Sample Application Circuit

LC7185-8750

No products described or contained herein are intended for use in surgical implants, life-support systems,
aerospace equipment, nuclear power control systems, vehicles, disaster/crime-prevention equipment and the like,
the failure of which may directly or indirectly cause injury, death or property loss.

Anyone purchasing any products described or contained herein for an above-mentioned use shall:
1 Accept full responsibility andindemnify and defend SANYO ELECTRIC CO., LTD.,its affiliates, subsidiaries and

distributors and all their officers and employees, jointly and severally, against any and all claims and litigation
and all damages, cost and expenses associated with such use:

2 Not impose any responsibility for any fault or negligence which may be cited in any such claim or litigation on

SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors or any of their officers and employees
jointly or severally.

Information (including circuit diagrams and circuit parameters) herein is for example only; it is not guaranteed for
volume production. SANYO believes information herein is accurate and reliable, but no guarantees are made or
implied regarding its use or any infringements of intellectual property rights or other rights of third parties.

This catalog provides information as of July, 1998. Specifications and information herein are subject to change without notice.

PS No. 3356-12/12

Ordering number: EN 3356A

CMOS IC

LC7185-8750

CB Transceiver PLL Frequency Synthesizer

and Controller

Overview

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).

Functions

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.

Features

1. A built-in programmable divider for the 16 MHz VCO

2. Transmission is inhibited when the PLL is unlocked (digital
lock monitor).

3. Direct channel 9 or 19 selection (sliding switch)

4. A 7-segment, 2-character LED display

5. ‘‘PA’’ is displayed in public announcement mode.

6. Output beep-tone control circuitry

7. Up to 5 channel settings can be stored in memory.

8. 4 × 3 key matrix implementation

Package Dimensions

unit : mm

3061-DIP30S

[LC7185-8750]

SANYO : DIP30S (400 mil)

Specifications

Absolute Maximum Ratings at Ta = 25°C, VSS=0V

Parameter Symbol Conditions Ratings Unit
Maximum supply voltage V
Input voltage V

Output voltage V

Output Current I

Allowable power
dissipation

Operating temperature Topr –40 to +85 °C
Storage temperature Tstg –55 to +125 °C

max Pin V

DD

1 max Pins HOLD, TX –0.3 to +15 V

IN

V

2 max Input pins other than VIN1 max –0.3 to VDD+0.3 V

IN

1 max Pins SA, SB, SC, SD, SE, SF, SG, D1, D2 –0.3 to +15 V

O

V

2 max Pins UL, BEEP –0.3 to +15 V

O

V

3 max Pin PD –0.3 to VDD+0.3 V

O

V

4 max Output pins other than mentioned above –0.3 to VDD+0.3 V

O

1 max Pins SA, SB, SC, SD, SE, SF, SG 0 to +30 mA

O

I

2 max Pins D1, D2 0 to +10 mA

O

I

3 max Pins UL 0 to +20 mA

O

I

4 max Pin BEEP 0 to +10 mA

O

Pd max (Ta % 85°C) 350 mW

DD

–0.3 to +9.0 V

SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters

TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN

73098HA(II)/5220TA No.3356-1/12