KS58006N - Samsung Electronics

KS58006 TONE/PULSE DIALER WITH REDIAL

INTRODUCTION

The KS58006 is DTMF/PULSE switchable dialer with a 32-digit redial which

can be done using a slide switch. All necessary dual-tone frequencies are

derived from a 3.579545 MHz TV crystal or ceramic resonator providing very

high accuracy and stability. The required sinusoidal wave form for each in-

dividual tone is digitally synthesized on the chip. The generated wave form

has very low total harmonic distortion (7% max). A voltage reference is

generated on the chip which is stable over the operating voltage and tem-

perature range and regulates the single levels of the dual tone to meet telephone

industry specifications. CMOS technology is applied to this device, for very

low power requirements high noise immunity, and easy interface to a variety

of telephones requiring external components.

FEATURES

•Tone/Pulse switchable (slide switch)

•32-digit capacity for redial

•Automatic mix redialing ( last number dial ) of

PULSE → DTMF with multiple auto access pause

• PABX auto-pause for 3.5 sec.

• 4 X 4 or ( 2 of 8 ) keyboard available

• Two key single tone operation

• Operating Voltage : 2.0 ~ 5.5V

• Numbers dialed manually after redial are cascadable

and stored as additional numbers for next redialing

• Uses inexpensive TV crystal or ceramic resonator

(3.579545MHz)

• Make/Break ratio (33.3 / 66.6) pin selectable

• Touch key hooking (604ms)

• Low standby current

• Improved EMI characteristic

•Improved redial memory quality

PIN CONFIGURATION

Fig. 1

Device Package Operating Temperature

KS58006N 18-DIP-300A - 20°C ~ + 70°C

1

2

3

4

5

6

7

8

910

11

12

13

14

15

16

17

18

KA58006

R1

R2

R3

R4

HS

M/B

MDS

OSC IN

OSC OUT

C4

C3

C2

C1

DP

X’

TONE OUT

VSS

VDD

MUTE

18-DIP-300A

ORDERING INFORMATION

KS58006 TONE/PULSE DIALER WITH REDIAL

BLOCK DIAGRAM

Fig. 2

ARRANGEMENT OF KEYBOARD TONE FREQUENCIES

C1 C2 C3 C4

* KEYBOARD DESCRIPTION

: HOOKING (604ms)

: PAUSE (3.5 second)

: REDIAL

KEYBOARD

LOGIC REDIAL

MEMORY

32 DIGIT

INPUT LOGIC

CONTROL

LOGIC

OSC DTMF

GENERATOR

OUPUT

LOGIC

R1

R2

R3

R4

C4

C3

C2

C1 MUTE

MDO

OSC IN OSC OUT

X’

TONE OUT

VSS

VDD

MUTE

KIT

DP

HS M/B MDS OPERATION

Input Specified Actual % Error

R1 697 699.1 + 0.31

R2 770 766.2 - 0.49

R3 852 847.4 - 0.54

R4 941 948.0 + 0.74

C1 1209 1215.7 + 0.57

C2 1336 1331.7 - 0.32

C3 1477 1471.9 - 0.35

1 2 3

456HK

789P

*0 # RD

R1

R2

R3

R4

HK

P

RD

KS58006 TONE/PULSE DIALER WITH REDIAL

PIN DESCRIPTION

Pin No Symbol Description

1- 4

15 -18 R1 - R4

C1 - C4

Keyboard (R1, R2, R3, R4, C1, C2, C3, C4)

These inputs can be interfaced to an XY matrix keyboard.

C1-C4 & R1-R4 are set to low at On Hook (HS = high). C1-C4 key inputs are set

to low and R1-R4 are set to high at OFF HOOK (HS = low) which enables the key-

input operation. The oscillator starts running when a keypress is detected. Scanning

signals are presented at both column and row inputs (TYP : 437Hz) until the

input key is released. Key inputs are compatible with standard 2-of-8 form or

single-contact keyboard. Debouncing is provided to avoid false entry (TYP : 4mS).

5

HS Hook Switch

This input detects the state of the hook switch contack. “Off Hook”

corresponds to VSS condition. “On Hook” corresponds to VDD condition.

6M/B Make/Break Ratio

This input provides the selection of the Make/Break ratio (33.3: 66.6/40:60)

when M/B is connected to VDD/VSS.

Mode Select Input

Pulse/DTMF mode is selected as shown is the following table.

Initial Mode means the state after going Off Hook (HS → ”VSS”)

7MDS

VDD Pulse MDS

Input = VSS

VSS Tone N/A

8 - 9 OSC IN

OSC OUT

Oscillator Input/Output

These pins are provided to connect an external 3.58MHz crystal. Oscillator

starts (at Off Hook) and is sustained unitl pulse or DTMF signals are finished.

10 - 11 VDD, VSS

Power

These are the power supply inputs. The device is designed to be operated on

2.0V to 5.5V

12 TONE OUT

DTMF Signal Output

When a valid keypress is detected in DTMF mode, appropriate low and high

group frequencies are generated which hybrid the Dual Tone Output.

Tone out is Off State in pulse mode.

X’MUTE Output

HS X’MUTE Output

13 X’MUTE VDD “ON”

Normally “OFF”

“ON” during pulse and DTMF dialing

(N channel open drain)

14 DP Dial Pulse Out

DP : The normal output will be “ON” during break and “OFF” during make at

“OFF HOOK”. The output will be “OFF” at “ON HOOK”.

VSS

MDS INITAL

MODE

SWITCHING

ENTRY MODE

KS58006 TONE/PULSE DIALER WITH REDIAL

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(VSS = 0V, VDD = 3.5V, fX’TAL = 3.579545MHz, Ta = 25°C, unless otherwise noted)

Characteristic Symbol Value Unit

Supply Voltage

Input Voltage

Output Voltage

Tone Output Current

Power Dissipation

Operating Temperature

Storage Temperature

VDD

VI

VO

VO (DXM)

IO (TONE)

PD

TOPR

TSTG

6.0

VSS - 0.3, VDD + 0.3

≤ VDD (DP, X’MUTE, MUTE)

50

500

- 20 ~ + 70

- 40 ~ + 125

V

mA

mW

°C

Characteristic Symbol Test Conditions Min Typ Max Unit

Operating Voltage Range VDD 2.0 5.5 V

Memory Retention Voltage VMR 1.0 V

Memory Retention Current IMR HS = VDD = 1.0V 0.05 0.1 µA

IDD (PULSE) MDS = VDD 0.1 0.3

IDD (TONE) MDS = VSS 0.4 0.7

10 50 µA

IOL1 DP, VDD = 3.5V 1.7 5.0

IOL2 X’MUTE VDD = 2.5V 0.5 1.5

VIH R1-R4, C1-C3, HS, M/B 0.8VDD VDD

VIL MDS VSS 0.2VDD

IL1 VDD = 3.5V, VIN = 0V 50

IL2 VDD = 2.5V, VIN = 0V 30

Valid Key Entry Time tKD 23 mS

Key Release Time tKR 5mS

Tone Duration tTD 110 mS

Tone Interdigit Pause Time tTIDP 110 mS

Column and Row

Scanning Frequency 437 Hz

Auto Access Pause Time tAP 3.5 sec

VDD = 2.5V, RL = 5KΩ-14.0 -12.0

VDD = 3.5V, RL = 5KΩ-14.0 -12.0

Ratio of Column to Row Tone dBCR VDD = 3.5V 1.0 2.0 3.0 dB

Distortion THD VDD = 3.5V 7%

Tone Output Delay Time tD(TONE) 1.5 mS

Operating Current

Standby Current

Output Current

Input Voltage

Input Current

Tone Output

ISB

fCR

VO(TONE)

One key selected

HS=VSS, All outputs

Unloaded

HS = VSS

No key selected.

All outputs

unloaded

VOL = 0.4V

R1-R4

mA

V

µA

dBV

ROW TONE

ONLY

KS58006 TONE/PULSE DIALER WITH REDIAL

APPLICATION INFORMATION

KEYBOARD OPERATION

1. SINGLE MODE OPERATION

Pulse Mode Operation

. . .

The pulse mode is defined by the initial mode after going off Hook and latched at key entry. This is the condition

under MDS = VDD.

Tone Mode Operation

. . .

The tone mode is defined by the initial mode after going off Hook and latched at key entry. This is the condition

under MDS = VSS.

Manual Dialing with Automatic Access Pause

. . .

Multiple Pause key entries can be accepted and stored in the redial memory, each as a digit. Each key provides

3.5 seconds pause time, but the P key entry as the first digit after going Off Hook is ignored. The key can also

be used as a pause key in the pulse mode. Pause (2) can be cancelled with the or key during pause time

in redialing.

= Any numeric key.

Redialing

Up to 32 digits can be dialed with the key. The key is disabled while pulse or DTMF signals are transmitted.

When more than 32 digits are stored, redial is also inhibited.

The key can be used as the key in the pulse mode.

Inhibiting Redial

. . .

Redial can be inhibited by depressing the key twice after DTMF or pulse signals are transmitted.

D1

Off Hook D1 Dn

D1

Off Hook DPD1 Dn

P

*

P

RD

D

Off Hook RD

RD

#

RD

Off Hook D1 Dn RD RD

RD

KS58006 TONE/PULSE DIALER WITH REDIAL

2. PULSE/TONE SWITCHABLE OPERATION

Mode Switching by MDS Input

. . . . . .

Pulse Mode DTMF Mode

The pulse mode is initially defined MDS = VDD, mode switching to the DTMF mode can be accepted by MDS = VSS,

the DTMF mode will be set up after the pulse mode is finished. In this mode, digits Dn + 1 ... Dn + m are transmitted

from Tone Out as DTMF signals by depressing the corresponding keys.

If no P key is contained serially before or after mode switching, the following condition is obtained.

. . . . . .

Pulse Mode DTMF Mode

(Dn+1≠Pause)

If digit is depressed after the pulse mode is finished, the DTMF mode will be set up after last the pulse signal

( ) is generated. In this mode,digits ... are transmitted from Tone Out as DTMF signals by depress-

ing the corresponding keys. If digit is depressed during dialing pulse signals. What happens? When the DTMF

mode is set, the Hold State will be set after last pulse signal Dn is finished. MDO will flash to indicate this Hold

State, ... are stored in redial memory as DTMF DATA and not transmitted from Tone Out. When it is

ready to transmit DTMF data in redial memory, the or key is depressed to reset this Hold State and

... data are serially transmitted.

Off Hook D1 Dn PSwitching MDS to VSS Dn+1 DN+m

Off Hook D1 Dn Switching MDS to VSS Dn+1 Dn+m

Dn+1

Dn

Dn+1

Dn+m

Dn+1

Dn+m

Dn+1

Dn+m

RD

P

KS58006 TONE/PULSE DIALER WITH REDIAL

TONE MODE TIMING (MDS = VSS)

Fig. 3

PULSE MODE TIMING (MDS = VDD)

Fig. 4

KEY INPUT 4 3

.

RD

TONE 4 3

.

X’MUTE

tTIDP

HS

KEY INPUT

DP

TONE OUT

MDS

D

2 3 PSwitching MS = VSS *2 1 8

tPA

tTIDP

tTD

X’MUTE

KS58006 TONE/PULSE DIALER WITH REDIAL

TIMING DIAGRAM (for Switching Mode Operation by MDS Input)

tPA : 3.5 sec

Fig. 5

HS

KEY INPUT

DP

TONE OUT

MDS

D

2 3 PSwitching MS = VSS *2 1 8

tPA

tTIDP

tTD

X’MUTE