UNISONIC TECHNOLOGIES CO., LTD
U9131X
Preliminary
CMOS IC
TONE/PULSE DIALER WITH
REDIAL FUNCTION
DESCRIPTION
The UTC
U9131X
series are monolithic ICs that offer the dialing
signals in either pulse or tone mode. The UTC
U9131X
series
feature a redial memory.
FEATURES
SOP-18
* Uses 4×4 keyboard
* Pulse-to-tone (P→T) keypad for long distance call operation
* Easy operation with redial, flash, pause, and P→T keypads
* 32 digits for redial memory
* Flash, Pause, P→T (pulse-to-tone) can be stored as a digit in
memory
* Switchable dialing mode：DTMF/Pulse
* Switchable beak/make ratio
* Minimum tone output duration: 100mS
* Minimum intertone pause: 100mS
* On-chip power-on reset
* Uses 3.579545MHz crystal or ceramic resonator
ORDERING INFORMATION
Ordering Number
Lead Free
U9131XL-S18-T
U9131XL-S18-R
U9131XAL-S18-T
U9131XAL-S18-R
U9131XAL-S18-T
(1)Packing Type
(2)Package Type
(3)Lead Free
(4)Dialer Type
Halogen Free
U9131XG-S18-T
U9131XG-S18-R
U9131XAG-S18-T
U9131XAG-S18-R
Package
SOP-18
SOP-18
SOP-18
SOP-18
Packing
Tube
Tape Reel
Tube
Tape Reel
(1) T: Tube, R: Tape Reel
(2) S18: SOP-18
(3) L: Lead Free, G: Halogen Free
(4) refer to DIALER TYPE
DIALER TYPE
The different dialers in the UTC
U9131X
series are shown in the following table:
TYPE NO.
U91312
U91314
U91316
U91312A
U91314A
PULSE (ppS)
10/20
10/20
10/20
10/20
10/20
FLASH (mS)
600
73
600
300
100
FLASH PAUSE (mS)
600
140
600
300
100
PAUSE (S)
2.0
3.6
3.6
2.0
3.6
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U9131X
PIN CONFIGURATION
Preliminary
CMOS IC
PIN DESCRIPTION
PIN NAME
Column-Row
Inputs
B/M
XT,
XT
T/P MUTE
DESCRIPTION
The keyboard input may be from either the standard 4×4 keyboard or an inexpensive
single contact (from A) keyboard. Electronic input from a
μC
can also be used. A valid
key entry is defined as a single row being connected to a single column.
The break make ratio is 60:40 if B/M=1 and is 66.6:33.3 if B/M=0. This pin has no
function in DTMF mode.
A built-in inverter provides oscillation with an inexpensive 3.579545MHz crystal or
ceramic resonator.
The T/P MUTE is a conventional CMOS N-channel open drain output. The output
transistor is switched on during pulse and tone mode dialing sequence and flash break.
Otherwise, it is switched off.
Pulling mode pin to V
SS
places the dialer in tone mode. Pulling mode pin to V
DD
places
the dialer in pulse mode (10ppS). Leaving mode pin floating places the dialer in pulse
mode (20ppS).
Hook switch input. HKS=1: On-book state. Chip in sleeping mode, no operation. HKS=0:
Off-book state. Chip enabled for normal operation. The HKS pin is pulled to V
DD
by an
internal resistor.
N-channel open drain dialing pulse output (Figure 1). Flash key will cause DP to go
active in both pulse mode and tone mode.
In pulse mode, remains in low state at all times. In tone mode, outputs a dual or single
tone. Detailed timing diagram for tone mode is shown in Figure 2 (a, b).
OUTPUT FREQUENCY
Specified
Actual
Error %
R1
697
699
+0.28
R2
770
766
-0.52
R3
852
848
-0.47
R4
941
948
+0.74
C1
1209
1216
+0.57
C2
1336
1332
-0.30
C3
1477
1472
-0.34
Power input pins.
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QW-R502-A34.a
PIN NO.
1-4 &
15-18
5
7, 8
9
13
MODE
10
11
HKS
DP
12
DTMF
14, 6
V
DD
, V
SS
UNISONIC TECHNOLOGIES CO., LTD
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U9131X
BLOCK DIAGRAM
Preliminary
CMOS IC
XT XT
HKS
B/M
MODE
SYSTEM CLOCK
GENERATION
READ/WRITE
COUNTER
ROW
(R1 to R4)
KEYBOARD
INTERFACE
RAM
CONTROL
LOGIC
PULSE
CONTROL
LOGIC
T/P MUTE
DP
COLUMN
(C1 to C4)
LOCATION
LATCH
DTMF
D/A
CONVERTER
ROW & COLUMN
PROGRAMMBLE
COUNTER
DATALATCH
& DECODER
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U9131X
ABSOLUTE MAXIMUM RATING
PARAMETER
DC Supply Voltage
Preliminary
CMOS IC
SYMBOL
RATINGS
UNIT
V
DD
-V
SS
-0.3~+7.0
V
V
IL
V
SS
-0.3
V
V
IH
V
DD
+0.3
V
Input/Output Voltage
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~+70
°C
Storage Temperature
T
STG
-55~+125
°C
Note: Absolute maximum ratings are those values beyond which the device could be permanently damaged.
Absolute maximum ratings are stress ratings only and functional device operation is not implied.
DC CHARACTERISTICS
(V
DD
-V
SS
=2.5V, F
OSC.
=3.58MHz, T
A
=25°C, all outputs unloaded)
SYMBOL
V
DD
I
OP
I
SB
I
MR
V
TO
T
HD
V
TDC
I
TL
I
PL
I
ML
R
KH
I
KD
I
KS
TEST CONDITIONS
Tone
Pulse
HKS=0, No load, & No key entry
HKS=1, V
DD
=1.0V
Row group, R
L
=5KΩ
Col/Row, V
DD
=2.0~5.5V
R
L
=5KΩ, V
DD
=2.0~5.5V
R
L
=5KΩ, V
DD
=2.0~5.5V
V
TO
=0.5V
V
PO
=0.5V
V
MO
=0.5V
V
I
=0V
V
I
=2.5V
MIN
2.0
TYP
0.3
0.15
MAX UNIT
5.5
V
0.5
mA
0.3
mA
15
μA
0.2
μA
170 mVrms
3
dB
-23
dB
3.0
V
mA
mA
mA
KΩ
μA
μA
5.0
KΩ
PARAMETER
Operating Voltage
Operating Current
Standby Current
Memory Retention Current
DTMF Output Voltage
Pre-emphasis
DTMF Distortion
DTMF Output DC Level
DTMF Output Sink Current
DP Output Sink Current
T/P MUTE Output Sink Current
HKS I/P Pull-high Resistor
Keypad Input Drive Current
Keypad Input Sink Current
Keypad Resistance
130
1
1.0
0.2
0.5
0.5
150
2
-30
300
30
200
400
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U9131X
AC CHARACTERISTICS
SYMBOL
T
KID
T
KRD
T
PDP
1
10ppS
T
PDP
2
20ppS
PARAMETER
Keypad Active in Debounce
Key Release Debounce
Preliminary
CMOS IC
TYP MAX UNIT
20
mS
20
mS
B/M=1
40
mS
Pre-digit Pause (Note 1)
B/M=0
33.3
B/M=1
20
mS
Pre-digit Pause (Note 2)
B/M=0
16.7
10ppS
800
Interdigit Pause (Auto dialing)
T
IDP
mS
20ppS
500
B/M=1
40:60
Make/Break Ratio
M/B
%
B/M=0
33:67
DTMF Output Duration
T
TD
Auto Dialing
100
mS
Intertone Pause
T
ITP
Auto Dialing
100
mS
U91314
73
U91314A
100
Flash Break Time
T
FB
mS
U91312A
300
U91312/U91316
600
U91314A
100
U91314
140
Flash Pause Time
T
FP
mS
U91312A
300
U91312/U91316
600
U91312
2.0
Pause Time
T
P
S
U91314/A/U91316
3.6
Notes: 1. Crystal parameters suggested for proper operation are Rs<100Ω, Lm=96mH, Cm=0.02pF, Cn=5pF,
C
I
=18pF, F
OSC
=3.579545MHz ± 0.02%.
2. Crystal oscillator accuracy directly affects these times.
TEST CONDITIONS
MIN
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