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1

Reflective Photosensors (Photo Reflectors)

CNZ2153

Reflective Photosensor

 Overview

CNZ2153 is a photosensor detecting the change of reflective light

in which a high efficiency GaAs infrared light emitting diode is used

as the light emitting element, and a Si phototransistor is used as the

light detecting element.  The two elements are located parallel in the

same direction and objects are detected  when passing in front of the

device.

 Features

Fast response

Small size and light weight

ø2.2

±

0.2

Mark for indicating

LED side

10.6

±

0.3

9.6

±

0.3

7.5

±

0.2

(3.2)

(7.2)

2

3

1

4

ø0.3

±

0.05

*2-0.9

±

0.15

ø0.45

±

0.05

3.0

±

0.2

4.0

±

0.2

1.7

±

0.2

6.0

±

0.2

10.2 min.

0.5

Unit : mm

Pin connection

1

4

3

2

,,

,

(Note)

   1. (    ) Dimension is reference

   2. * is dimension at the root of leads

,,

,,

,,

,

,

,

,,,,

,

R

L

I

F

I

C

V

CC

d = 3 mm

Standard white paper (Reflective ratio 90%)

10%

90%

t

r

t

f

 Absolute Maximum Ratings 

(Ta = 25˚C)

Parameter

Symbol Ratings

Unit

Input (Light

Reverse voltage (DC)

V

R

3

V

emitting diode)

Forward current (DC)

I

F

50

mA

Power dissipation

P

D

*1

75

mW

Collector to emitter voltage

V

CEO

30

V

Output (Photo Emitter to collector voltage

V

ECO

5

V

transistor)

Collector current

I

C

20

mA

Collector power dissipation

P

C

*2

50

mW

Temperature

Operating ambient temperature

T

opr

–25 to +85

˚C

Storage temperature

T

stg

–30 to +100

˚C

*1

 Input power derating ratio is 1.0 mW/˚C at Ta 

 25˚C.

*2

 Output power derating ratio is 0.67 mW/˚C at Ta 

 25˚C.

 Electrical Characteristics 

(Ta = 25˚C)

Parameter

Symbol

Conditions

min

typ

max

Unit

Input

Forward voltage (DC)

V

F

I

= 50mA

1.2

1.5

V

characteristics

Reverse current (DC)

I

R

V

= 3V

10

µ

A

Capacitance between terminals

C

t

V

= 0V, f

 

= 1MHz

50

pF

Output characteristics Collector cutoff current

I

CEO

V

CE 

= 10V

0.2

µ

A

Transfer

Collector current

I

C

*1

V

CC 

= 5V, I

= 20mA, R

= 100

100

µ

A

characteristics

Response time

t

r

*2

 

, t

f

*3

V

CC 

= 10V, I

= 0.1mA, R

= 100

6

µ

s

Collector to emitter saturation voltage V

CE(sat)

I

= 50mA, I

= 0.1mA

0.5

V

*1  

Transfer characteristics measurement circuit

    (Ambient light is shut off completely)

*2  

Time required for the collector current to increase from

    10% to  90% of its final value.

*3  

Time required for the collector current to decrease from

    90% to  10% of its initial value.

 Applications

Detection of paper, film and cloth

   Optical mark reading

Detection of position and edge

  Detection of coin and bill

Start, end mark detection of magnetic tape

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2

CNZ2153

Reflective Photosensors (Photo Reflectors)

60

50

40

30

20

10

Ambient temperature    Ta  (˚C )

0

20

40

60

80

100

0

– 25

I

F

 — V

F

60

30

20

10

50

40

Forward voltage    V

F

  (V)

 Forward current    I

F

  (mA)

0.4

0.8

1.2

1.6

2.4

2.0

0

0

Ta = 25˚C

V

F

 — Ta

1.6

1.2

0.8

0.4

Ambient temperature    Ta  (˚C )

Forward voltage    V

F

  (V)

0

20

40

60

80

100

0

– 40 – 20

0

20

40

60

80

100

– 40 – 20

0

20

40

60

80

100

– 40 – 20

I

C

 — I

F

10

1

10

 –1

10

 –2

 Forward current    I

F

  (mA)

Collector current    I

C

  (mA)

1

10

10

 2

10

 –3

10

 –1

V

CC

 = 5V

R

L

 = 100

Ta = 25˚C

I

C

 — V

CE

10

 2

10

1

10

 –1

Collector to emitter voltage    V

CE

  (V)

Collector current    I

C

  (mA)

1

10

10

 2

10

 –2

10

 –1

Ta = 25˚C

Relative output current    I

C

  (%)

I

C

 — Ta

160

120

80

40

Ambient temperature    Ta  (˚C )

0

V

CC

 = 5V

I

F

 = 20mA 

R

L

 = 100

I

CEO

 — Ta

10

10

 –2

1

10

 –3

10

 –1

Ambient temperature    Ta  (˚C )

V

CE

 = 10V

Dark current    I

CEO

  (

µ

A)

10

 –4

1

10

10

 –1

t

r

 — I

C

10

1

Collector current    I

C

  (mA)

Rise time    t

r

  (

µ

s)

10

 –1

10

 –2

10

 3

10

 2

V

CC

 = 10V

Ta = 25˚C

I

C

 — d

0.32

0.16

0.06

0.24

Collector current    I

C

  (mA)

2

4

8

6

0

0

V

CC

 = 5V

Ta = 25˚C

R

L

 = 100

I

F

 = 20mA

Distance   d  (mm)

I

F

 , I

C

 — Ta

Forward current, collector current    I

, I

C

 (mA)

I

F

 = 30mA

20mA

10mA

100

R

L

 = 1k

500

 10mA

I

F

 = 50mA

I

F

I

C

,

,

d