IL2533N datasheet(4/27 Pages) INTEGRAL

Part #	IL2533N

Description	MULTISTANDARD CMOS IC OF SINGLE CHIP PHONE WITH DOUBLE SOFT LIMITATION

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Manufacturer	INTEGRAL [Integral Corp.]

Direct Link	http://www.iksemi.com/

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IL2533

Table 1 continued

No

Pin letter

symbol

Function

17

R4

18

R3

19

R2

20

R1

Keyboard line.

(see keyboard scheme at figure 3)

21

FCI

Frequency comparator input.

Schmitt flip-flop input for ring frequency determination

22

LED

LED output driver.

Output for LED control, blinking in “Program / Mute ”state

23

24

M1

M2

Microphone outputs

Differential inputs for microphone (electret type)

25

CS

Input of current shunting control.

Given N-channel output with open drain controls outer shunting high capacity

transistor for modulation of line voltage and for line shorting during period of

pulse number dialing

26

VSS

Negative supply connection

27

LI

Line input.

Input is used for power abstraction and (adjusting) of line current

28

RI

Receipt input.

Input for signal received

*Note – LD – pulse number dialing;

*MF – frequency number dialing;

*DTMF – two-frequency dialing (often case of frequence dialing)

Function selection (general table)

Function

Straight memory (single key)

4

Indirect memory (two key)

10

Redialing

yes

LNR key

yes

Insert by LNR pause key

yes

Pause key PS

yes

Р/М key or МТ

Р/М

Tone/Pulse key (Т/Р)

yes

Temporary MF key "

∗"

yes

Automatic setup key (А – D)

yes

Volumes keys (VOL, "-/+")

yes

Volume reset by off-hook

yes

Tone ring programming

yes

Pause duration “flash” R3

600m

4

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IL2533N Datasheet(PDF) 4 Page - Integral Corp.

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