HT9315A(18DIP) datasheet, PDF - EEWORLD Datasheet

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HT9315A(18DIP): DescriptionTelephone Circuit; CategoryWireless rf/communication Telecom circuit; File Size276KB，27 Pages; ManufacturerHoltek; Websitehttp://www.holtek.com/

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HT9315A(18DIP) Overview

Telephone Circuit

HT9315A(18DIP) Parametric

Parameter Name	Attribute value
Maker	Holtek
Reach Compliance Code	unknown

HT9315A(18DIP) Preview

HT9315 Series

15-Memory Tone/Pulse Dialer

Patent Number: 64097, 86474, 113235(R.O.C.), 5424740(U.S.A.)

Features

Universal specification

Operating voltage: 2.0V~5.5V

Low standby current

Low memory retention current: 0.1mA (Typ.)

Tone/pulse switchable

Interface with LCD driver

32 digits for redialing

32 digits for the SA memory dialing

One-key redialing

Pause and P®T key for PBX

4´5 keyboard matrix

3.58MHz crystal or ceramic resonator

Hand-free control

Hold-line control

Pause, P®T can be saved for redialing

Lock function

Keytone function

Resistor options:

M/B ratio

Flash function and flash time (86ms~600ms)

Pause and P®T duration

Pulse number

Keyboard operated IDD lock function

Keyboard form

HT9315A/HT9315AL: 18-pin DIP package

HT9315B/HT9315BL: 22-pin SKDIP package

HT9315C/HT9315CL: 20-pin DIP package

HT9315D/HT9315DL: 24-pin SKDIP package

General Description

The HT9315 series tone/pulse dialers are CMOS LSIs for

telecommunication systems. They are designed to meet

various dialing specifications through resistor option ma-

trix.

The HT9315 series are offered in two different ver-

sions. They are HT9315x normal version and

HT9315xL lock version, with keyboard-operated IDD

lock function. The two versions also supply the follow-

ing functions: Hold-line, Hand-free and LCD dialing

number display interface, all of which are suitable for

feature phone applications.

Selection Table

Function

Item

HT9315x

HT9315A

HT9315B

HT9315C

HT9315D

HT9315xL

HT9315AL

HT9315BL

HT9315CL

HT9315DL

Lock

Function

(Normal version)

98ms

20 DIP

24 SKDIP

18 DIP

22 SKDIP

Hold-Line

Hand-Free

LCD

Interface

Min.

Flash Time

Package

(Mechanical and Keyboard Operated Lock Version)

Lock 0

Lock 0, 9

Lock All

Keyboard

Operated Lock

98ms

20 DIP

24 SKDIP

18 DIP

22 SKDIP

Rev. 1.20

October 1, 2002

HT9315 Series

Block Diagram

C 1

K e y

C o lu m n

C 5

. S M

C o n tro l

C h e c k

D O U T

C L O C K

T o n e

O u t

P u ls e

O u t

D T M .

P O

X M U T E

K e y

. u n c tio n

E n c o d e r

W R M

C o u n te r

S R A M

T o n e

E n c o d e r

C o n v e rte r

A D D R L

R 1

K e y R o w

R 4

E n c o d e r

. la s h

D e b o u n c e

M o d e In

H D /H .

H K S

H . I

H D I

H D O

H . O

M O D E

X 1

X 2

D iv id e r

C lo c k

G e n e ra to r

M /B

T im e r

K e y to n e

G e n e ra to r

Pin Assignment

HT9315x/xL version

H D I

C 1

C 2

C 3

C 4

C 5

X 1

X 2

X M U T E

V S S

1 8

1 7

1 6

1 5

1 4

1 3

1 2

1 1

1 0

R 4

R 3

R 2

R 1

M O D E

D T M .

P O

H K S

V D D

C 2

C 3

C 4

C 5

X 1

X 2

X M U T E

V S S

H . I

1 0

1 1

2 2

2 1

2 0

1 9

1 8

1 7

1 6

1 5

1 4

1 3

1 2

1 0

1 1

1 2

2 4

2 3

2 2

2 1

2 0

1 9

1 8

1 7

1 6

1 5

1 4

1 3

H D O

R 4

R 3

R 2

R 1

M O D E

D T M .

P O

H K S

V D D

H . O

C L O C K

H D O

R 4

R 3

R 2

R 1

M O D E

D T M .

P O

H K S

V D D

H . O

C 1

1 0

C 2

C 3

C 4

C 5

X 1

X 2

X M U T E

V S S

D O U T

2 0

1 9

1 8

1 7

1 6

1 5

1 4

1 3

1 2

1 1

C 1

R 4

R 3

R 2

R 1

M O D E

D T M .

P O

H K S

V D D

C L O C K

C 2

C 3

C 4

C 5

X 1

X 2

X M U T E

V S S

H . I

D O U T

H T 9 3 1 5 A /A L

1 8 D IP -A

H T 9 3 1 5 B /B L

2 2 S K D IP -A

H T 9 3 1 5 C /C L

2 0 D IP -A

H T 9 3 1 5 D /D L

2 4 S K D IP -A

Keyboard Information

. o rm

C 1

R 1

* /T

R /P

R 2

R 3

R 4

C 2

C 3

C 4

S A

C 5

E M 1

E M 2

E M 3

S T

R 1

R 2

R 3

R 4

* /T

. o rm

C 1

C 2

C 3

C 4

C 5

E M 1

E M 2

E M 3

S T

Rev. 1.20

October 1, 2002

HT9315 Series

Pin Description

Pin Name

I/O

Internal

Connection

Description

These pins form a 4´5 keyboard matrix which can perform keyboard input detection

and dialing specification setting functions. When on-hook (HKS=high) all the pins are

set high. While off-hook the column group (C1~C5) remains low and the row group

(R1~R4) is set high for key input detection.

An inexpensive single contact 4´5 keyboard can be used as an input device.

Pressing a key connects a single column to a single row, and actuates the system os-

cillator that results in a dialing signal output. If more than two keys are pressed at the

same time, no response occurs. The key-in debounce time is 20ms. Refer to the key-

board information for keyboard arrangement and to the functional description for dial-

ing specification selection.

C1~C5

R1~R4

I/O

CMOS

IN/OUT

The system oscillator consists of an inverter, a bias resistor and the necessary

load capacitor on chip. Connecting a standard 3.579545MHz crystal or ceramic

OSCILLATOR resonator to the X1 and X2 terminals can implement the oscillator function. The

oscillator is turned off in the standby mode, and is actuated whenever a keyboard

entry is detected.

NMOS OUT

XMUTE is an NMOS open drain structure pulled to VSS during dialing signal

transmission. Otherwise, it is an open circuit. XMUTE is used to mute the speech

circuit when transmitting the dial signal.

This pin is used to monitor the status of the hook-switch and its combination with

HFI/HDI can control the PO pin output to make or break the line.

HKS=VDD: On-hook state (PO=low). Except for HFI/HDI

(hand-free/hold-line control input), other functions are all disabled.

HKS=VSS: Off-hook state (PO=high). The chip is in the standby mode and ready to

receive the key input.

This pin is a CMOS output structure which by receiving the HKS and HFO/HDO

signals, control the dialer to connect or disconnect the telephone line.

PO outputs a low to break line when HKS is high (on-hook) and HFO/HDO is low.

PO outputs a high to make line when HKS is low (off-hook) or HFO is high or HDO

is high.

During the off-hook state, this pin also outputs the dialing pulse train in pulse

mode dialing. While in the tone mode, this pin is always high.

This is a three-state input/output pin, use for dialing mode selection, either Tone

mode or Pulse mode, 10pps/20pps

MODE=VDD: Pulse mode, 10pps

MODE=OPEN: Pulse mode, 20pps

MODE=VSS: Tone mode

During the pulse mode dialing, switching this pin to the tone mode changes the

subsequent digit entry to tone mode. When the chips are in tone mode, switching

to pulse mode will also be recognized.

This pin is active only when the chip transmits tone dialing signals. Otherwise, it

always outputs a low. The pin outputs tone signals to drive the external transmitter

amplifier circuit. The load resistor should not be less than 5kW.

This pin is a Schmitt trigger input structure. Active low. Applying a negative going

pulse to this pin can toggle the HDO output once.

An external RC network is recommended for input debouncing. The pull-high re-

sistance is 200kW typ.

The HDO is a CMOS output structure. Its output is toggle- controlled by a negative

transition on HDI. When HDO is toggled high, PO keeps high to hold the line. The

hold function can be released by setting HFO high or by an on/off hook operation

or by another HDI input. Refer to the functional description for the hold-line func-

tion.

XMUTE

HKS

CMOS IN

CMOS OUT

MODE

I/O

CMOS

IN/OUT

DTMF

CMOS OUT

HDI

CMOS IN

Pull-High

HDO

CMOS OUT

Rev. 1.20

October 1, 2002

HT9315 Series

Pin Name

I/O

Internal

Connection

CMOS IN

Pull-Low

Description

This pin is a Schmitt trigger input structure. Active high. Applying a positive pulse

to HFI can toggle the HFO once and hence control the hand-free function. The

pull-low resistance of HFI is 200kW typ.

An external RC network is recommended for input debouncing.

The HFO is a CMOS output structure. Its output is toggle- controlled by a positive

transition on HFI pin. When HFO is high, the hand-free function is enabled and PO

outputs a high to connect the line.

The hand-free function can be released by setting HDO high or by an on-off-hook op-

eration or by another HFI input. Refer to the functional description for the hand-free

functional operation.

NMOS open drain output pin. It outputs the BCD code of the dialing digits to the

LCD driver chip (HT16XX series) or MCU for dialing number display. Refer to the

functional description for the detailed timing.

NMOS open drain output. When dialing, it outputs a series of pulse trains for

DOUT data synchronization. DOUT data is valid at the falling edge of the clock.

Positive power supply, 2.0V~5.5V for normal operation

Negative power supply, ground

HFI

HFO

CMOS OUT

DOUT

NMOS OUT

CLOCK

VDD

VSS

NMOS OUT

Approximate internal connection circuits

C M O S IN /O U T

V D D

N M O S O U T

C M O S IN

C M O S O U T

V D D

C M O S IN

P u ll- H ig h

C M O S IN

P u ll- L o w

X 1

2 0 P

O S C IL L A T O R

X 2

1 0 M

1 0 P

E N

Absolute Maximum Ratings

Supply Voltage ...........................................-0.3V to 6V

Storage Temperature ...........................-50°C to 125°C

Input Voltage .............................. V

-0.3

to V

+0.3V

Operating Temperature ..........................-20°C to 75°C

Note: These are stress ratings only. Stresses exceeding the range specified under

²Absolute

Maximum Ratings² may

cause substantial damage to the device. Functional operation of this device at other conditions beyond those

listed in the specification is not implied and prolonged exposure to extreme conditions may affect device reliabil-

ity.

Rev. 1.20

October 1, 2002

HT9315 Series

Electrical Characteristics

Symbol

Parameter

Operating Voltage

Operating Current

Test Conditions

Pulse

2.5V

Tone

STB

XMO

OLXM

HKS

HFI

HDI

OH1

OL1

OH2

OL2

OH3

OL3

BRK

OSC

Standby Current

Memory Retention Voltage

Memory Retention Current

Input Low Voltage

Input High Voltage

XMUTE Leakage Current

XMUTE Sink Current

HKS Pin Input Current

HFI Pull-Low Resistance

HDI Pull-High Resistance

Keypad Pin Source Current

Keypad Pin Sink Current

HFO Pin Source Current

HFO Pin Sink Current

HDO Pin Source Current

HDO Pin Sink Current

Pause Time After Flash

One-key Redialing Pause Time

Key-in Debounce Time

Break Time for One-key Redialing

System Frequency

2.5V

On-hook

XMUTE

=12V, No entry

XMUTE

=0.5V

HKS

=2.5V

HFI

=2.5V

HDI

=0V

=2.5V

=2V

=0.5V

=2V

=0.5V

Control key

Digit key

One-key redialing

Crystal=3.5795MHz

Conditions

Off-hook

Keypad entry

No load

Min.

0.8V

-4

200

-1

3.5759

0.1

200

400

0.2

1.2

3.5795

OSC

=3.5795MHz, Ta=25°C

Typ.

0.2

0.6

Max.

5.5

0.2

0.2V

0.1

-40

3.5831

Unit

MHz

On-hook, no load

No entry

Rev. 1.20

October 1, 2002

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HT9315A(18DIP) Related Products

	HT9315A(18DIP)	HT9315AL(18DIP)	HT9315BL(22SKDIP)	HT9315C(20DIP)	HT9315CL(20DIP)	HT9315D(24SKDIP)	HT9315DL(24SKDIP)
Description	Telephone Circuit	Telephone Circuit	Telephone Circuit	Telephone Circuit	Telephone Circuit	Telephone Circuit	Telephone Circuit
Maker	Holtek	Holtek	Holtek	Holtek	Holtek	Holtek	Holtek
Reach Compliance Code	unknown	unknown	unknown	unknown	unknown	unknown	unknown

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