NTE NTE1745 Datasheet

NTE1745

Integrated Circuit

High Speed Divider 1/20, 1/100 for VCR

Description:

The NTE1745 is a semiconductor integrated circuit in an 8–Lead SIP type package consisting of a
built–in 1/20 and 1/100 high–speed frequency divider featuring an ECL circuit configuration.

Features:

D High–Speed Operation (f
D Operation at Low Input Amplitudes (180mV

= 130MHz)

max

Minimum Input Amplitude)

p–p

D TTL Level Output

Applications:

FM radio prescalers, digital equipment for consumer and industrial applications

Function:

This divider is based on an ECL circuit configuration. When a frequency up to a maximum of 130MHz
is applied to the TI input pin, 1/20–divided output is produced when the division ratio selection input
pin (M) is low–level or a 1/100–divided output is produced when the division ratio selection input pin
(M) is high–level. The output (TO) is available in the TTL level open collector format.

Absolute Maximum Ratings: (TA = –10° to +75°C unless otherwise specified)
Supply Voltage, V

Input Signal Voltage, V
Output Signal Voltage, V

CC

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

I

O

Power Dissipation (TA = +25°C), P
Operating Temperature Range, T
Storage Temperature Range, T

stg

opr

D

–10° to +75°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

–55° to +125°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.5V

5.5V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.33W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

9V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

p–p

Electrical Characteristics: (TA = –10° to +75°C unless otherwise specified)

Parameter Symbol Test Conditions Min Typ Max Unit

Supply Voltage V
Low–Level Output Current I
Input Frequency f
High Input Voltage (M Input) VIH(M) 2.6 – V
Low Input Voltage (M Input) VIL(M) 0 – 0.4 V
Input Signal Voltage V
Circuit Current I
Low–Level Output Voltage V
Minimum Operating Frequency f
High Input Current (M Input) I
Low Input Current (M Input) I
Output Leakage Current I

CC

OL

TA = +25°C 30 – 130 MHz

IN

TA = +25°C 180 – 800 mV

i

VCC = 5V – 6.5 – mA

CC

VCC = 4.5V, IOL = 5mA – – 0.5 V

OL

max
IH(M)
IL(M)

O(Leak)VCC

VCC = 5V, TA = +25°C, VIN = 180mV
VCC = 5V, VIH(M) = 2.6V – 2 – µA
VCC = 5V, VIL(M) = 0.4V – 0.1 – µA

Pin Connection Diagram

p–p

= 5V, VO = 5.5V – – 100 µA

(Front View)

To Open Collector Output

8
7

V

CC

N.C.

6

4.5 5 5.5 V
– – 5 mA

cc

130 – – MHz

V

p–p

5

V

Input Reference Bias

ref

Input (T)

4

Frequency Division Ratio

3

Selection Input (M)
N.C.

2

GND

1

.768 (19.52) Max

18

.100 (2.54) Typ

.118 (3.0) Max

.264 (6.72)

Max

.165
(4.2)

Min

.700 (17.78)