NTE1693
Integrated Circuit
Telephone Pulse Dialer (CMOS)
Description:
The NTE1693 is a CMOS LSI pulse dialer in a 16Lead DIP type package with redial which integrates
a ceramic resonator as a frequency reference.
Features:
D
Make Ratio: 33/39% PinSelectable.
D
Pulse Output: "1" True
D
Mute Output: "0" True
D
17Digit Redial with either * or # Input
D
Uses a Ceramic Oscillator as a Frequency Reference
D
Direct Telephone Line Operation
D
Uses either a Standard 2of7 Matrix Keyboard or a Single Contact Keyboard
D
Mute Signal Generated on Pulse Signal
Absolute Maximum Ratings:
Supply Voltage (Note 1), V
DD
0.3 to +6.2V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maximum Pin Voltage
V
IN1
(Note 2)
0.3V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
V
IN2
(Note 3)
+0.3V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maximum Power Dissipation (T
A
= +25
C), P
D
500mW
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Temperature Range, T
opr
30
to +60
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage Temperature Range, T
stg
55
to +150
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Note 1. Referenced to GND
Note 2. The maximum applicable voltage or any pin with respect to GND
Note 3. The maximum applicable voltage on any pin with respect to V
DD
Recommended Operating Conditions:
Supply Voltage, V
DD
2.5 to 6.0V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DC Electrical Characteristics: (T
A
= 30
to +60
C unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
Key Contact Resistance
R
KI
1
k
Keyboard Capacitance
C
KI
30
pF
Input Voltage
K
1H
2of7 input mode, Note 4
0.8V
DD
V
DD
V
GND
0.2V
DD
V
Key PullUp Resistance
K
IRU
V
DD
= 6.0V, V
IN
= 4.8V
4
k
Key PullDown Resistance
K
IRD
100
k
MUTE Sink Current
I
M
V
DD
= 2.5V, V
OUT
= 0.5V, Note 5
500
A
Pulse Output Sink Current
I
P
V
DD
= 2.5V, V
OUT
= 0.5V, Note 6
1.0
mA
V
DD
V
RFF
Value
V
REF
I
SUPPLY
= 150
A, Note 7
1.5
2.5
3.5
V
Memory Retention Current
I
MR
All outputs in noload state
0.7
A
Operating Current
I
OP
All outputs in noload state
100
150
A
MUTE, PULSE Leakage
I
LKG
V
DD
= 6.0V, V
OUT
= 6.0V, Note 5, Note 6
0.001
1
A
Note 4. Applies to key input pins (ROW1ROW4 COL1COL3)
Note 5. Applies to MUTE output pin.
Note 6. Applies to PULSE output pin
Note 7. Applies to V
REF
pin.
AC Electrical Characteristics:
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
Oscillator Frequency
f
OSC
Note 8
480
kHz
Keyboard Debounce Time
t
DB
10
ms
Time for Valid Key Entry
t
KD
40
ms
Oscillator StartUp Time
t
ON
Note 9
6
ms
Pulse Rate
P
R
10
pps
Break Time
t
B
Pin9 tied to V+
61
ms
Pin9 tied to V
67
ms
InterDigital Pause
t
IDP
800
ms
Note 8. Typical values are exact with a nominal 480kHz frequency reference (except for oscillator
startup time)
Note 9. Ceramic resonator should have the following equivalent values: R
<
20
, RA
70k
, C
O
500pF.
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