SWITCHABLE DIALER. HM91710B Datasheet

HM91710B DIALER. Datasheet pdf. Equivalent

HM91710B Datasheet
Recommendation HM91710B Datasheet
Part HM91710B
Description TONE/PULSE SWITCHABLE DIALER
Feature HM91710B; HM91710A/B HM91710A/B TONE/PULSE SWITCHABLE DIALER TONE/PULES SWITCHABLE DIALER GENERAL DESCRIPTION.
Manufacture ELAN Microelectronics Corp
Datasheet
Download HM91710B Datasheet




ELAN Microelectronics Corp HM91710B
HMH9M197117010AA//BB
TONE/TPOUNLES/PEUSLWESISTWCIHTCAHBALBELEDDIAIALLEERR
GENERAL DESCRIPTION
The HM91710A/B are Tone/Pulse switchable dialer which are fabricated in CMOS technology with wide
operating voltage for both tone and pulse mode, and consumes very low memory retention current in ON-HOOK
state.
FEATURES
• Tone/pulse switchable dialer.
• One 32-digit last number redial memory.
• Pulse to tone (PT) is provided for PBX operation.
• Flash key is available.
• Minimum tone duration is 98ms or 83ms.
• Minimum intertone pause is 98ms or 83ms.
• Uses 3.579545 MHz crystal or ceramic resonator.
• Many options can be selected.
Mode (10 PPS ; 20 PPS ; Tone)
M/B ratio (40 : 60 ; 33 : 66)
Pause time (3.6s)
• Flash function (RESET)
PT pause time (3.6s)
Flash time (600ms; 300ms; 100ms; or 80ms).
• Mixed dialing.
• Handfree function is provided for speaker phone application.
• Power on reset circuit is provided.
• Package in DIP18 or DIP16.
PIN ASSIGNMENTS
HM91710A
EM91710A
C2
C3
C4
C1
OSCI
OSCO
XMUTE
V SS
1
2
3
4
5
6
7
8
16 R3
15 R2
14 R1
13 R4
12 TONE
11 PO
10 HKS
9 VDD
HM91710B
EM91710B
C2
C3
C4
C1
OSCI
OSCO
XMUTE
VSS
HFI
1
2
3
4
5
6
7
8
9
18 R3
17 R2
16 R1
15 R4
14 TONE
13 PO
12 HKS
11 VDD
10 HFO
* This specification are subject to be changed without notice.
4.10.2002 1



ELAN Microelectronics Corp HM91710B
HM91710A/B
TONE/PULSE SWITCHABLE DIALER
KEYBOARD ASSIGNMENT
C1 C2 C3
R1 1 2 3
R2 4 5 6
R3 7 8 9
R4 * 0 #
C4
PT
F
P
RD
FUNCTIONAL BLOCK DIAGRAM
1). PT : In pulse mode, execute PT function.
2). F : Flash key.
3). RD : Redial key.
4). P : Pause key.
COL1
COL2
COL3
COL4
OSCI
OSCO
ROW1
ROW2
ROW3
ROW4
OSC.
DIVIDER
OUTPUT INTERFACE CKT.
PULSE
GENERATOR
PO
LNB MEMORY
INPUT INTERFACE CKT.
DECODER &
DATA LATCH
ROW/COLUMN
PROGRAMMING
COUNTER
D/A CONVERTER
TONE
DIALING SIGNAL OPTION :
a]:Flash time:
Row3 Row4 flash time(ms)
NR NR
NR R
600
300
R NR
100
RR
80
b).
Row1 Row2 MODE PULSE RATE
R NR TONE
R R TONE
NR NR PULSE
20PPS
NR R PULSE 20PPS
UR NR PULSE
10PPS
UR R PULSE
10PPS
M/B
40:60
33:66
40:60
33:66
c]:Tone function:
Col1
NR
R
Tone Duration
98 ms
83 ms
inter-Tone
Pause
98 ms
83 ms
d]:Key type select
Col2 *or*/T
select
NR * Note: NR:no resistance.
R : A resistance connect to Vss (820Ktypically)
R */T
UR: A resistance connect to V DDDD
* This specification are subject to be changed without notice.
1.7.2002
2



ELAN Microelectronics Corp HM91710B
HM91710A/B
TONE/PULES SWITCHABLE DIALER
PIN DESCRIPTION
Symbol
Function
C1 Provides keyboard scanning .
C2 a. Keyboard scanning:
C3 HKS pin is LOW, the column group stays in "HIGH" stays and row group stays in "LOW" state.
C4 The key pad is compatible with the standard dual contact matrix keyboard (as Figure 1b.), the
inexpensive single contact keyboard (as Figure 1a.), and electronic input (as Figure 1c.).
When HKS is "low", a valid key entry is defined by related Row & Column connection or by
R1 electronic input; (as show in Figure 1c).
R2 Activation of two or more keys will result in no response, except for single key.
R3 To avoid keyboard bouncing error, this chip provides built-in debounce circuit. (The debounce
R4 time = 20 ms.)
Row Column
Figure 1a : Single contact form keyboard configuration
Row
Column
Figure 1b : Dual contact form keyboard configuration
Row
Column
VDD
VSS
VDD
VSS
Figure 1c : Electronic signal input keyboard configuration
OSCI
OSCO
XMUTE
V
SS
VDD
HKS
PO
Oscillator input & Oscillator output pins.
The 3.579545 MHz oscillator is formed by a built-in inverter inside of this chip and by connecting a
3.579545 MHz crystal or a ceramic resonator across the OSCI and OSCO pins. (built-in feedback
resistor and capacitor)
When HKS is low, a valid key-in may turn on this oscillator and generates a 3.579545 MHz clock.
Mute output pins.
NMOS open drain output structure.
The output is in low state during dialing sequence (both Pulse and Tone mode) otherwise this pin is
"high-impedance".
Long (continue) Mute.
Negative power supply pin.
Positive power supply pin.
Hook switch input pin.
When the handset is in ON-HOOK state, this pin must be pulled "high" in order to disable the dialing
operation and decrease the power consumption.
When in OFF-HOOK state, the HKS pin must be pulled "low" state for all function operation.
Pulse output signal pin.
NMOS open drain output structure.
The output is "low" during pulse dialing and Flash operation, otherwise this output is "floating".
* This specification are subject to be changed without notice.
1.7.2002 3







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