NTE NTE1691, NTE1692 Datasheet
NTE1691 & NTE1692
Integrated Circuit
w
Telephone Pulse Dialer
Description:
The NTE1691 a nd N TE1692 a re m onolithic CMOS integrated circuits i n a n 1 8–Lead DIP type package
that provide all the features required for implementing a pulse dialer with redial.
Functions:
D Mute Output Logic “0”
D Pulse
D RC Oscillation for Reference Frequency
D Designed to Operate Directly from the Telephone Line
D Used CMOS Technology for Low Voltage, Low Power Operation
D Power Up Clear Circuitry
D NTE1691 Pin2: V
D NTE1692 Pin2: Tone Out
Features:
D Uses Either a Standard 2 of 7 Matrix Keyboard with Negative True Common or the Inexpensive
Form A–Type Keyboard
D Make/Break Ratio Can Be Selected
D Redial with * or #
D Tone Signal Output or On–Chip Reference Voltage by Bonding Option on Chip
D 10pps/20pps Can be Selected
Output Logic “0”
REF
/Redial
Absolute Maximum Ratings:
DC Supply Voltage, V
Voltage on Any Pin, V
Power Dissipation, P
Operating Temperature Range, T
Storage Temperature Range, T
CC
IN
D
(TA = +25°C unless otherwise specified)
stg
opr
6.2V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
VCC+0.3, GND–0.3V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
500mW. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
–30° to +60°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
–65° to +150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DC Electrical Characteristics: (TA = +25°C, Note 1 unless otherwise specified)
Parameter Symbol Test Conditions Min Typ Max Unit
Supply Voltage V
Key Contact Resistance R
Keyboard Capacitance C
Key Input Voltage K
Key Pull–Up Resistance K
Key Pull–Down Resistance K
Mute Sink Current I
Pulse Output Sink Current I
Tone Output Sink Current I
Tone Output Source Current I
Memory Retention Current I
Operating Current I
Mute or Pulse Off Leakage I
V
Output Source Current I
REF
CC
KI
KI
IH
K
IL
IRU
IRD
M
P
TL
TH
MR
OP
LKG
REF
Note 2 – – 1
Note 2 – – 30 pF
2 of 7 input mode, Note 2 0.8V
VCC = 6V – 100 –
VIN = 4.8V – 4.0 – kΩ
VCC = 2.5V, VO = 500mV, Note 3 500 – – µA
VCC = 2.5V, VO = 500mV, Note 4 1.0 – – mA
VCC = 2.5V, VO = 500mV, Note 5 250 – – µA
VCC = 2.5V, VO = 500mV, Note 5 250 – – µA
All outputs under no load, Note 7 – 0.7 – µA
All outputs under no load – 100 150 µA
VCC = 6V, VO = 6V, Note 3, Note 4 – 0.001 1.0 µA
Note 6 1.0 7.0 – mA
2.5 – 6.0 V
CC
GND – 0.2V
– V
CC
CC
kΩ
kΩ
Note 1. Typical values are to be used as a design aid and are not subject to production testing.
Note 2. Applies to key input pin (R
Note 3. Applies to MUTE
Note 4. Applies to PULSE
output pin.
output pin.
1–R4
, C1–C3).
Note 5. Applies to TONE pin (NTE1692 only).
Note 6. Applies to V
pin (NTE1691 only).
REF
Note 7. Current necessary for memory to be maintained. All outputs unloaded.
V
V
AC Electrical Characteristics: (TA = +25°C, unless otherwise specified)
Parameter Symbol Test Conditions Min Typ Max Unit
Oscillator Frequency F
Key Input Debounce Time T
Key Down Time for Valid Entry T
Key Down Time During Two–Key Roll Over t
Oscillator Start–Up Time t
Mute Valid After Last Outpulses t
Pulse Output Pulse Rate P
On–Hook Time Required to Clear Memory t
Pre–Digital Pause T
Inter–Digital Pause T
OSC
KR
MO
OH
PDP
IDP
Note 8 – 4 – kHz
Note 10, Note 11 – 10 – ms
DB
Note 11, Note 12 40 – – ms
KD
Note 11 5 – – ms
VCC = 2.5V – 1 – ms
os
Note 10, Note 11 – 5 – ms
Note 9 – 10 – PPS
R
Note 11 300 – – ms
Note 10, Note 11 – 800 – ms
Note 10, Note 11 – 800 – ms
Frequency Stability ∆f VCC = 2.5 to 3.5V – ±4 – %
VCC = 2.5 to 6.0V – ±4 – %
Tone Output Frequency F
TONE
Note 11, Note 13 – 1 – kHz
Note 8. RS = 2MΩ, R = 220kΩ, C = 390pF.
Note 9. If Pin10 is tied to V
Note10. If the 20pps option is selected, the time will be
, the output pulse rate will be 20pps.
CC
1
/2 these shown.
Note11. These times are directly proportional to the oscillator frequency.
Note12. Debounce plus oscillator start–up time ≤ 40ms.
Note13. If the 20pps option is selected, the tone output frequency will be 2kHz (NTE1692 only).
Loading...