NTE NTE1536 Datasheet

NTE1536

Integrated Circuit

CB Transceiver PLL Frequency Synthesizer

Description:

The NTE1536 is a CMOS LSI device for the 27MHZ Citizen’s Band Transceiver.

Function:

The NTE1536 composes a Phase Lock Loop (PLL) frequency synthesizer system with only one
crystal for an AM CB transceiver.

Features:

D Only one crystal is required for AM CB transceiver.
D Two types of intermediate frequency can be selected:

IF1 = 10.695MH
IF2 = 9.785MH

D Two types of lock monitor outputs:

LM: When PLL is locked/unlocked, LM is high/low level.
LM: When PLL is locked/unlocked, LM is low/high level.

D The amplifier for low pass filter.
D The amplifier for programmable counter input.
D The detecting circuit for the mis–programming.
D BCD code input to the programmable counter.
D The buffer output for the reference oscillator.
D The output for the half frequency of the reference oscillator.
D The reference frequency oscillation amplifier (with feedback resistance).

Z

Z

Absolute Maximum Ratings: (TA = +25°C unless otherwise specified)

Maximum Supply Voltage, VDDmax –0.3 to +9.0V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Input Voltage, V
Output Voltage, V

IN

(Unload) –0.3 to VDD+0.3V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

OUT

Operating Temperature Range, T
Storage Temperature Range, T

stg

opg

–0.3 to VDD+0.3V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

–30° to +70°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

–40° to +125°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Available Operation Conditions: (TA = +25°C, VDD = 7V ±1V unless otherwise specified)

Parameter Symbol Test Conditions Min Typ Max Units

Supply Voltage V
High Level Input Voltage V
Low Level Input Voltage V

DD

IH

IL

Input Amplitude VIN (1) 10.25MHZ, Duty 50±10% Sine Wave 3.0 – 0.9V

VIN (2) 3.5MHZ, Duty 50±10% Sine Wave 0.7 – 0.66V

Input Frequency f

(1) 3.0Vp–p, Duty 50±10% Sine Wave – – 10.25 MH

IN

6.0 7.0 8.0 V

VDD–1.5 – – V

– – 1.5 V

Vp–p

DD

Vp–p

DD

fIN (2) 0.7Vp–p, Duty 50±10% Sine Wave – – 3.5 MH

Electrical Characteristics: (TA = +25°C, VDD = 7V ±1V unless otherwise specified)

Parameter Symbol Test Conditions Min Typ Max Units

Feedback Resistance Rf (1) – 7.0 – MΩ

Rf (2) – 3.0 – MΩ
Pull–Down Resistance RP – 28 – kΩ
Input Floating Voltage V
3 State Off Leak Current I
Output Off Leak Current I

OFF
OFF

I

OFF

Input Current I
Filter Amp Gain VG Rf = 1MΩ, fIN = 10kHZ, Rg = 600Ω – 28 – dB

Pin Opened – 1.0 – V

IF

(1) VO = VDD/2 – 1.0 – nA
(2) VO = V
(3) VO = V

VI = VDD, VI = V

IN

DD
SS

SS

– – 3.0 µA
– – 3.0 µA
– 1.0 – nA

Z
Z

Low Level Output Voltage V
High Level Output Voltage V
Dissipation Current I

Pin Connection Diagram

1

D1

2

D2

3

D3

4

D4
D5

5

D6

6
7

IFS

8

T/R

9

V

DD

10

X IN

IO = 2mA – – 0.9 V

OL
OHIO

DD

fIN (1) = 10.24MHZ,
fIN (2) = 3.5MHZ, N = 182

V

20

SS

A

19

OUT

A

18

IN

17 PD OUT
16

LM

15

LM

14

PC IN
1/2 R OUT

13

R OUT

12

11

X OUT

= 5mA VDD–0.9 – – V

– – 20 mA

Pin Functions

D1 – D6 Program Input (BCD) 1/2 R OUT 1/2 Freq of Ref Osc
IFS 10.695/9.785MH

T/R TX/RX Sw LM
V

DD

X IN Crystal Oscillator A
X OUT Crystal Oscillator A
R OUT Buffer Output of Ref Osc V

D1: LSB, D6: MSB PC IN Programmable Divider Input

Supply Voltage PD OUT Phase Detector Output

Sw LM Lock Monitor Output

Z

IN
OUT
SS

Lock Monitor Output
Filter Amp Input

Filter Amp Output
GND