NTE2062 データシートの表示（PDF） - NTE Electronics
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NTE2062 Datasheet PDF : 5 Pages
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Electrical Characteristics: (VDD = –12V, TA = +25°C unless otherwise specified)
Parameter
Symbol
Test Conditions
Min Typ Max Unit
Input “HIGH” Level Current
Input “LOW” Level Current
Output “HIGH” Level Current
Output Leakage Current
Power Failure Detect Voltage
Current Dissipation
IIH VIN = VSS, 50/60Hz
VIN = VDD, Input Pins other than 50/60Hz
IIL VIN = VDD, 50/60Hz
VIN = VDD, Input Pins other than 50/60Hz
IOH Alarm Out, Sleep Out, VOH = VSS–1V
10’s Hr ag & de (24Hr Mode), VOUT =
VSS–1V
Segment Outputs other than above,
VOUT = VSS–1V
IOF Alarm Out, Sleep Out, VOUT = VDD
10’s Hr ag & de (24Hr Mode), VOUT = VDD
Segment Outputs other than above,
VOUT = VDD
VDD
ICC Output: OFF, Input with Pull–Down
Resistor: Open
– – 10 µA
– – 20 µA
– – 10 µA
– – 10 µA
5 – – mA
36 – – mA
18 – – mA
– – 10 µA
– – 20 µA
– – 20 µA
–7.5 –5.0 – V
– 5 7 mA
Stability of Oscillator for Backup
Accuracy of Oscillator for Backup
FS Typical value, 900Hz, VDD = –9V ±10%
FA Typical value, 900Hz, VDD = –9V ±10%
–10 – +10 %
–10 – +10 %
Operation Description:
50Hz/60Hz Input:
The On–Chip Schmitt Trigger circuit allows a simple RC filter at the input to remove possible line volt-
age transients. An internal pull–up resistor is provided.
CR Input: (Note 1)
When AC power–down occurs, the time counter enters the “hold” mode and the on–chip clock oscilla-
tor starts operating immediately. If there is no input at “50/60Hz input” during 3–clock period, this oscil-
lator controls the time counter advance instead of “50/60Hz input”. The values of CR determine the
frequency of the on–chip clock oscillator. All segment outputs are off during backup operation. If the
backup OSC is used at the power–down mode, “50/60Hz input” must be open or at VSS level.
50/60Hz Select Input:
Connecting “50/60Hz select” to VSS enables 50Hz operation. For 60Hz operating, “50/60Hz select”
is left unconnected: Pull–down to VDD is provided by the internal pull–down resistor.
Display Mode Select Input (Alarm Display/Sleep Display):
The internal pull–down resistor allows the use of 2 SPST (single–pole single–throw) switches to select
4 display modes listed in Table 1.
Select Input
Alarm Sleep
Display Mode
Table 1. Display Mode
Digit No.1
Digit No. 2
Digit No. 3
Digit No. 4
N.C.
N.C.
Time Display 10’s Hour, AM/PM
Hour
10’s Minute
Minute
VSS
N.C.
VSS
N.C.
VSS
VSS
Alarm Display 10’s Hour, AM/PM
Sleep Display
Blanked
Seconds Display
Blanked
Hour
Hour
Minute
10’s Minute
10’s Minute
10’s Second
Minute
Minute
Second
Note 1. If VSS is applied to 2 input of “alarm display” and “sleep display” simultaneously, the seconds
display mode is entered.
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