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Электронный компонент: W91472CN

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W91472N SERIES
6-MEMORY TONE/PULSE DIALER WITH
SAVE AND HANDFREE FUNCTIONS
Publication Release Date: May 1997
- 1 -
Revision A2
GENERAL DESCRIPTION
The W91472N series are tone/pulse switchable telephone dialers with five memories, save memory,
and handfree dialing control. These chips are fabricated using Winbond's high-performance CMOS
technology and thus offer good performance in low-voltage and low-power operations.
FEATURES
DTMF/pulse switchable dialer
Two by 32 digit redial and save memory
Five by 16 digit one-touch direct repertory memory
Pulse-to-tone (*/T) keypad for long distance call operation
Cascaded dialing
Uses 5
6 keyboard
Easy operation with redial, flash, pause, and */T keypads
Pause, P
T (pulse-to-tone) can be stored as a digit in memory
Dialing rate (10 ppS or 20 ppS) selectable by bonding option
On-hook debounce time: 150 mS
Minimum tone output duration: 93 mS
Minimum intertone pause: 93 mS
Pause time: 3.6 sec.
Flash break time (73 mS, 100 mS, 300 mS, or 600 mS) selectable by keypad; pause time is 1.0S
Make/break ratio (40:60 or 33.3:66.7) selectable by MODE pin
On-chip power-on reset
Uses 3.579545 MHz crystal or ceramic resonator
18 or 20-pin dual-in-line plastic package
The different dialers in the W91472N series are shown in the following table:
TYPE NO.
REPLACEMENT
TYPE NO.
PULSE
(ppS)
FLASH
(mS)
M/B
KEY
TONE
HANDFREE
DIALING
PACKAGE
(PINS)
W91472N
W91472
10
600/300/73/100
Pin
-
-
18
W91472AN
W91472A
10
600/300/73/100
Pin
Yes
Yes
20
W91472BN
W91472B
20
600/300/73/100
Pin
-
-
18
W91472CN
W91472C
20
600/300/73/100
Pin
Yes
Yes
20
W91472N SERIES
- 2 -
PIN CONFIGURATIONS
1
2
3
4
5
6
7
8
9
16
11
12
13
14
15
10
17
18
C2
C3
C4
V
T/P MUTE
XT
C1
SS
XT
C5
R3
R1
R2
DD
DTMF
V
R4
DP/C6
MODE
HKS
W91472N/472BN
1
2
3
4
5
6
7
8
9
10
18
13
14
15
16
17
11
12
19
20
C1
C2
C3
C4
SS
V
XT
T/P MUTE
HFI
C5
XT
W91472AN/472CN
R4
R1
R2
R3
DD
MODE
V
DTMF
HKS
HFO
DP/C6
PIN DESCRIPTION
SYMBOL
18-PIN
20-PIN
I/O
FUNCTION
Column-
Row Inputs
1
-
5
&
15
-
18
1
-
5
&
17
-
20
I
The keyboard input is compatible with a standard 5 x 6
keyboard, an inexpensive single contact (Form A)
keyboard, and electronic input.
In normal operation, any single button can be pushed to
produce dual tone, pulses, or function. Activation of two
or more buttons will result in no response except for
single tone.
XT
7
7
I
A built-in inverter provides oscillation with an
inexpensive 3.579545 MHz crystal. The oscillator
ceases when a keypad input is not sensed. The crystal
frequency deviation is 0.02%.
XT
8
8
O
Crystal oscillator output pin.
T/P MUTE
9
9
O
The T/P MUTE is a conventional CMOS N-channel
open drain output.
The output transistor is switched on low level during
dialing sequence (both pulse and tone mode).
Otherwise, it is switched off.
W91472N SERIES
Publication Release Date: May 1997
- 3 -
Revision A2
Pin Description, continued
SYMBOL
18-PIN
20-PIN
I/O
FUNCTION
MODE
13
15
I
Pulling mode pin to V
SS
places dialer in tone mode.
Pulling mode pin to V
DD
places dialer in pulse mode
with M/B ratio of 40:60 (10 ppS, except for
91472BN/472CN = 20 ppS).
Leaving mode pin floating places dialer in pulse mode
with M/B ratio of 33.3:66.7 (10 ppS, except for
W91472BN/472CN = 20 ppS).
HKS
10
12
I
The HKS input is used to sense whether the handset is
on-hook or off-hook.
In on-hook state, HKS = 1: chip is in sleeping mode, no
operation.
In off-hook state, HKS = 0: chip is enabled for normal
operation.
HKS pin is pulled to V
DD
by internal resistor.
DP / C6
11
13
O
N-channel open drain dialing pulse output.
Flash key will cause DP to be active in either tone mode
or pulse mode.
The timing diagram for pulse mode is shown in Figure 1
(a, b, c, d).
DTMF
12
14
O
During pulse dialing, this pin remains in low state
regardless of keypad input. In the tone mode, it will
output a dual or single tone.
A detailed timing diagram for tone mode is shown in
Figure 2 (a, b, c, d).
R1
R2
R3
R4
C1
C2
C3
Specified
697
770
852
941
1209
1336
1477
699
766
848
948
1216
1332
1472
Actual
+0.28
-0.52
-0.47
+0.74
+0.57
-0.30
-0.34
Error %
OUTPUT FREQUENCY
V
DD
, V
SS
14, 6
16, 6
I
Power input pins for the dialer chip. V
DD
is the main
power and V
SS
is the ground.
W91472N SERIES
- 4 -
Pin Description, continued
SYMBOL
18-PIN
20-PIN
I/O
FUNCTION
HFI,
HFO
-
10, 11
I, O
Handfree control pins.
A low pulse on the HFI input pin toggles the handfree
control state.
Status of the handfree control state is listed in the
following table:
HOOK SW.
-
On Hook
Off Hook
On Hook
Off Hook
Off Hook
CURRENT STATE
NEXT STATE
HFO
Low
High
High
-
Low
High
INPUT
HFI
HFI
HFI
Off Hook
On Hook
On Hook
HFO
High
Low
Low
Low
Low
High
DIALING
Yes
No
Yes
Yes
No
Yes
HFI pin is pulled to V
DD
by an internal resistor.
Detailed timing diagram is shown in Figure 3.
BLOCK DIAGRAM
ROW
COLUMN
DTMF
XT
XT
HKS
MODE
RAM
COUNTER
SYSTEM CLOCK
GENERATOR
LOCATION
LATCH
D/A
ROW & COLUMN
PROGRAMMABLE
COUNTER
DATA LATCH
& DECODER
READ/WRITE
HFI
(R1 to R4, Vx)
(C1 to C5)
T/P MUTE
HFO
CONTROL
LOGIC
PULSE
CONTROL
LOGIC
KEYBOARD
INTERFACE
CONVERTER
DP/C6
W91472N SERIES
Publication Release Date: May 1997
- 5 -
Revision A2
FUNCTIONAL DESCRIPTION
C1
C2
C3
C4
DP /
C6
C5
1
2
3
S
M1
M4
R1
4
5
6
F4
M2
M5
R2
7
8
9
M3
R3
*/T
0
#
R/P
SAVE
R4
F1
F2
F3
Vx
S: Store function key
R/P: Redial and pause function key
*/T: * in tone mode and P
T key in pulse mode
SAVE: Save function key for one-touch 32-digit memory
M1, ..., M5: One-touch memory
F1, ..., F4: Flash function keys: F1 = 600 mS, F2 = 300 mS, F3 = 73 mS, F4 = 100 mS, and all
flash
pause time is 1.0 mS
Note: Mn = M1 , ..., M5; Dn = 0, ..., 9, */T, #, Pause.
Normal Dialing
OFF HOOK
(or
ON HOOK
&
HFI
),
D1
,
D2
, ...,
Dn
1. D1, D2, ..., Dn will be dialed out.
2. Dialing length is unlimited, but redial is inhibited if length exceeds 32 digits in nomal dialing.
Redialing
OFF HOOK
(or
ON HOOK
&
HFI
),
D1
,
D2
, ...,
Dn
Busy, Come
ON HOOK
,
OFF HOOK
(or
ON HOOK
&
HFI
),
R/P
1. The redial memory content will be D1, D2, ..., Dn.
2. The
R/P
key can execute the redial function only as first key-in after off-hook. Otherwise, it
will
execute the pause function.
W91472N SERIES
- 6 -
Number Store
1.
OFF HOOK
(or
ON HOOK
&
HFI
),
D1
,
D2
, ...,
Dn
,
S
,
S
,
Mn
a. If the sequence of the dialed digits D1, D2, ..., Dn has not
finished,
S
will be ignored.
b. D1, D2, ..., Dn will be dialed out and stored in memory location Mn.
2.
OFF HOOK
(or
ON HOOK
&
HFI
),
S
,
D1
,
D2
, ...,
Dn
,
S
,
Mn
a. D1, D2, ..., Dn will be stored in memory location Mn but will not be dialed out.
b.
R/P
and
*/T
keys can be stored as a digit in memory, but
R/P
key cannot be the first
digit. In store
mode,
R/P
is the pause function key.
c. The store mode is released after the store function is executed or when the state of the hook switch
changes or the flash function is executed.
Save
1.
OFF HOOK
(or
ON HOOK
&
HFI
),
D1
,
D2
, ...,
Dn
,
SAVE
a. D1, D2, ..., Dn will be dialed out.
b. If the dialing
of
D1
to
Dn
is finished, pressing
SAVE
will cause D1 to Dn to be
duplicated to save memory.
2.
ON HOOK
,
OFF HOOK
(or
HFI
),
SAVE
D1 to Dn will be dialed out after the
SAVE
key is pressed.
Repertory Dialing
OFF HOOK
(or
ON HOOK
&
HFI
),
Mn
(or
SAVE
)
The content of memory location Mn (or save) will be dialed out.
Access Pause
OFF HOOK
(or
ON HOOK
&
HFI
),
D1
,
D2
,
R/P
,
D3
, ...,
Dn
1. The pause function can be stored as a digit in memory.
2. The pause function is executed in normal dialing or redialing or memory dialing.
3. The pause function timing diagram is shown in Figure 4.
W91472N SERIES
Publication Release Date: May 1997
- 7 -
Revision A2
Pulse-to-Tone (*/T)
OFF HOOK
(or
ON HOOK
&
HFI
),
D1
,
D2
, ...,
Dn
,
*/T
,
D1'
,
D2'
, ...,
Dn'
1. If the mode switch is set to pulse mode, then the output signal will be:
D1, D2, ..., Dn, Pause, D1', D2', ..., Dn'
(Pulse)
(Tone)
2. If the mode switch is set to tone mode, then the output signal will be:
D1, D2, ..., Dn, * , D1', D2', ..., Dn'
(Tone)
(Tone)
3. The dialer remains in tone mode when the digits have been dialed out and can be reset to pulse
mode only by going on-hook.
4. The function timing diagram is shown in Figure 5.
Flash
OFF HOOK
(or
ON HOOK
&
HFI
),
Fn
1. Fn = F1, ..., F4.
2. If
Fn
is pressed, the dialer will execute flash break time of 600 mS (F1), 300 mS (F2),
73 mS (F3), or 100 mS (F4). The pause time is 1.0 second.
3. Flash key cannot be stored as a digit in memory. The flash key has first priority among keyboard
functions.
4. The system will return to the initial state after the flash pause time is finished.
5. The flash function timing diagram is shown in Figure 6.
Cascaded Dialing
OFF HOOK
(or
ON HOOK
&
HFI
),
1.
Normal dialing
+
Repertory dialing
+
Normal dialing
(1st sequence)
(2nd sequence)
2.
Repertory dialing
+
Normal dialing
+
Repertory dialing
(1st sequence)
(2nd sequence)
3.
Redialing
+
Normal dialing
+
Repertory dialing
(1st sequence)
(2nd sequence)
Redialing and save dialing is valid only as the first key-in.
W91472N SERIES
- 8 -
ABSOLUTE MAXIMUM RATINGS
PARAMETER
SYMBOL
RATING
UNIT
DC Supply Voltage
V
DD
-
V
SS
-0.3 to +7.0
V
Input/Output Voltage
V
IL
V
SS
-0.3
V
V
IH
V
DD
+0.3
V
V
OL
V
SS
-0.3
V
V
OH
V
DD
+0.3
V
Power Dissipation
P
D
120
mW
Operating Temperature
T
OPR
-20 to +70
C
Storage Temperature
T
STG
-55 to +150
C
Note: Exposure to conditions beyond those listed under Absolute Maximum Ratings may adversely affect the life and reliability of the
device.
DC CHARACTERISTICS
(V
DD
-V
SS
= 2.5V, Fosc. = 3.58 MHz, T
A
= 25
C, All outputs unloaded)
PARAMETER
SYMBOL
CONDITIONS
MIN.
TYP.
MAX.
UNIT
Operating Voltage
V
DD
-
2.0
-
5.5
V
Operating Current
I
OP
Tone
-
0.40
0.60
mA
Pulse
-
0.20
0.40
mA
Standby Current
I
SB
HKS = 0, No load &
No key entry
-
-
15
A
Memory Retention
Current
I
MR
HKS = 1, V
DD
= 1.0V
-
-
0.2
A
Tone Output Voltage
V
TO
Row group, R
L
= 5 K
130
150
170
mVrm
s
Pre-emphasis
-
Col/Row, V
DD
= 2.0 to
5.5V
1
2
3
dB
DTMF Distortion
THD
R
L
= 5 K
, V
DD
= 2.0 to
5.5V
-
-30
-23
dB
DTMF Output DC
Level
V
TDC
R
L
= 5 K
, V
DD
= 2.0 to
5.5V
1.0
-
3.0
V
DTMF Output Sink
Current
I
TL
V
TO
= 0.5V
0.2
-
-
mA
DP Output Sink
Current
I
PL
V
PO
= 0.5V
0.5
-
-
mA
W91472N SERIES
Publication Release Date: May 1997
- 9 -
Revision A2
DC Characteristics, continued
PARAMETER
SYMBOL
CONDITIONS
MIN.
TYP.
MAX.
UNIT
T/P MUTE Output
Sink Current
I
ML
V
MO
= 0.5V
0.5
-
-
mA
HFO Drive/Sink
I
HFH
V
HFH
= 2.0V
0.5
-
-
mA
Current
I
HFL
V
HFL
= 0.5V
0.5
-
-
Keypad Input Drive
Current
I
KD
V
I
= 0V
4
-
-
A
Keypad Input Sink
Current
I
KS
V
I
= 2.5V
200
400
-
A
Keypad Resistance
-
-
-
-
5.0
K
AC CHARACTERISTICS
PARAMETER
SYMBOL
CONDITIONS
MIN.
TYP.
MAX.
UNIT
Key-in Debounce
T
KID
-
-
20
-
mS
Key Release Debounce
T
KRD
-
-
20
-
mS
On-hook Debounce
T
OHD
-
-
150
-
mS
Pre-digit Pause
1
T
PDP1
Mode Pin = V
DD
-
40
-
mS
10 ppS
Mode Pin = Floating
-
33.3
-
mS
Pre-digit Pause
2
T
PDP2
Mode Pin = V
DD
-
20
-
mS
20 ppS
Mode Pin = Floating
-
16.7
-
mS
Interdigit Pause
T
IDP
10 ppS
-
800
-
mS
(Auto dialing)
20 ppS
-
500
-
mS
Make/Break Ratio
M:B
Mode Pin = V
DD
-
40:60
-
%
Mode Pin = Floating
-
33.3:66.7
-
%
Tone Output Duration
T
TD
-
93
-
mS
Intertone Pause
T
ITP
-
93
-
mS
Flash Break Time
T
FB
F1
-
600
-
mS
F2
-
300
-
F3
-
73
-
F4
-
100
-
Flash Pause Time
T
FP
-
1.0
-
S
Pause Time
T
P
-
3.6
-
S
Notes:
1. Crystal parameters suggested for proper operation are Rs < 100
, Lm = 96 mH, Cm = 0.02 pF, Cn = 5 pF, Cl = 18 pF,
F
OSC
. = 3.579545 MHz
0.02%.
2. Crystal oscillator accuracy directly affects these times.
W91472N SERIES
- 10 -
TIMING WAVEFORMS
T
IDP
HKS
KEY IN
DP
T/P MUTE
2
B
M
T
IDP
T
IDP
T
KID
T
IDP
T
PDP
2
M B
4
T
KRD
3
T
KID
DTMF
OSC.
Low
OSCILLATION
OSCILLATION
T
PDP
Figure 1(a). Normal Dialing Timing Diagram
HKS
KEY IN
DP
T/P MUTE
R/P
T
KID
B
M
T
IDP
T
IDP
T
PDP
M B
DTMF
OSC.
Low
OSCILLATION
T
IDP
T
KRD
T < T
OHD
Figure 1(b). Pulse Mode Auto Dialing Timing Diagram
W91472N SERIES
Publication Release Date: May 1997
- 11 -
Revision A2
Timing Waveforms, continued
HKS
KEY IN
DP
T/P MUTE
R/P
T
KID
B
M
T
IDP
T
PDP
M B
DTMF
OSC.
Low
OSCILLATION
T
KRD
T > T
OHD
Figure 1(c). Pulse Mode Auto Dialing Timing Diagram
HKS
KEY IN
T/P MUTE
DTMF
5
4
3
T
TD
OSC.
DP
OSCILLATION
2
T
ITP
T
ITP
T
KID
High
T
ITP
OSCILLATION
T
KRD
Figure 2(a). Tone Mode Normal Dialing Timing Diagram
W91472N SERIES
- 12 -
Timing Waveforms, continued
T/P MUTE
HFI
HKS
ON HOOK
HFO
High
CHIP ENBLE
Figure 3. Handfree Timing diagram
OSC.
Low
OSCILLATION
2
T
KID
R/P
3
B
M
T
PDP
M
T
IDP
B
T
PDP
T
P
HKS
KEY IN
T/P MUTE
DTMF
DP
Figure 4. Pause Function Timing Diagram
W91472N SERIES
Publication Release Date: May 1997
- 13 -
Revision A2
Timing Waveforms, continued
HKS
KEY IN
DP
DTMF
OSC.
OSCILLATION
2
T
KID
*/T
3
B
M
T
PDP
T
IDP
T
P
T
ITP
T/P MUTE
Figure 5. Pulse-to-Tone Timing Diagram
F
F
HKS
T
KID
DTMF
OSC.
DP
KEY IN
Low
3
T
FB
F
T
KID
T
KID
T
ITP
OSCILLATION
HFI
HFO
T
FB
T
FP
T/P MUTE
T
FP
Figure 6. Flash Timing Diagram
W91472N SERIES
- 14 -
Headquarters
No. 4, Creation Rd. III,
Science-Based Industrial Park,
Hsinchu, Taiwan
TEL: 886-3-5770066
FAX: 886-3-5792697
http://www.winbond.com.tw/
Voice & Fax-on-demand: 886-2-7197006
Taipei Office
11F, No. 115, Sec. 3, Min-Sheng East Rd.,
Taipei, Taiwan
TEL: 886-2-7190505
FAX: 886-2-7197502
Winbond Electronics (H.K.) Ltd.
Rm. 803, World Trade Square, Tower II,
123 Hoi Bun Rd., Kwun Tong,
Kowloon, Hong Kong
TEL: 852-27516023
FAX: 852-27552064
Winbond Electronics North America Corp.
Winbond Memory Lab.
Winbond Microelectronics Corp.
Winbond Systems Lab.
2730 Orchard Parkway, San Jose,
CA 95134, U.S.A.
TEL: 1-408-9436666
FAX: 1-408-9436668
Note: All data and specifications are subject to change without notice.