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參數(shù)資料
| 型號(hào)： | NTE1731 |
| 廠商： | NTE Electronics, Inc. |
| 英文描述： | Quadruple Operational Amplifier 14-TSSOP 0 to 70 |
| 中文描述： | 集成電路的CMOS 10號(hào)脈沖撥號(hào) |
| 文件頁(yè)數(shù)： | 2/5頁(yè) |
| 文件大小： | 29K |
| 代理商： | NTE1731 |
DC Characteristics:
(
–
30
°
C
Parameter
Standby Current
Operating Current
MUTE Sink Current
Pulse Sink Current
MUTE Pulse Leakage Current
Key Contact Resistance
Keyboard Capacitance
“
0
”
Logic Level
“
1
”
Logic Level
Key Pull
–
Up Resistance
Key Pull
–
Down Resistance
T
A
Symbol
I
SB
I
OP
I
ML
I
PL
I
LKG
RK
1
CK
1
V
IL
V
IN
K
RU
K
RD
=60
°
C unless otherwise specified)
Test Conditions
V
DD
= 2.5V, Note 5
V
DD
= 2.5V, Note 6
V
DD
= 2.5V, V
O
= 0.5V
V
DD
= 2.5V, V
O
= 0.5V
V
DD
= 6V, V
O
= 6V
Min
–
–
0.5
1.0
–
–
–
GND
0.8V
DD
–
–
Typ
1.0
10
0
2.0
4.0
0.001
–
–
–
–
100
5.0
Max
5.0
200
–
–
1.0
1.0
3.0
0.2V
DD
V
DD
–
–
Unit
μ
A
μ
A
mA
mA
μ
A
k
pF
V
V
k
k
V
DD
= 4V, Note 7
V
DD
= 4V, Note 7
Note 5. All output pins in no
–
load condition when clock is stopped in Off
–
Hook mode.
Note 6. All output pins in no
–
load condition during key input, in either On
–
Hook or Off
–
Hook Mode.
Note 7. Resistance when ROW and COL pins are scanned at 125Hz and at high or low level.
AC Characteristics:
Parameter
Symbol
f
OSC
t
DB
t
OS
P
R
t
B
Test Conditions
Note 8
Note 9, Note 10
Min
–
–
–
–
–
–
–
–
Typ
480
32
–
10
60
68
840
2
Max
–
–
8.0
–
–
–
–
–
Unit
kHz
ms
ms
pps
ms
ms
ms
ms
Oscillator Frequency
Key Debounce Time
Oscillator Start
–
Up Time
Pulse Rate
Break Time
Note 10
Pin9 = V
DD
, Note 10
Pin9 = GND, Note 10
Note 10
Note 10
Inter
–
Digital Pause Time
Mute Overlap Time
t
IDP
t
MOL
Note 8. Use elements with the following characteristics as the ceramic oscillator:
R
<
20
, R
A
≥
70K
, C
O
≤
500pF.
Note 9. Key input is accepted if it is valid 32msec after the start of oscillation.
Note10. Changes in proportion to the frequency of the oscillator.
Functional Description:
Dialed Number Memory
During normal dialing, each digit is stored in the LND (Last Number Dialed) buffer, location 0. The
telephone number dialed can be left in this temporary LND buffer for later use or it can be copied into
any of the other nine permanent memory locations.
Telephone numbers to be automatically dialed by the NTE1731 may be entered into the LND buffer
while either On
–
Hook or Off
–
Hook.
Dialed Number Memory (Cont’d)
However, the NTE1731 must be in On
–
Hook mode for a number to be copied into a permanent
memory location. A number may be copied and stored by entering the key sequence
N
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