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MM5483 データシート(PDF) 3 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
部品番号 MM5483
部品情報  Liquid Crystal Display Driver
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メーカー  NSC [National Semiconductor (TI)]
ホームページ  http://www.national.com
Logo NSC - National Semiconductor (TI)

MM5483 データシート(HTML) 3 Page - National Semiconductor (TI)

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Absolute Maximum Ratings (Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Voltage at Any Pin
V
SS to VSS +10V
Operating Temperature
−40˚C to +85˚C
Storage Temperature
−65˚C to +150˚C
Power Dissipation
300 mW at +85˚C
350 mW at +25˚C
Junction Temperature
+150˚C
Lead Temperature
(Soldering, 10 seconds)
300˚C
DC Electrical Characteristics
T
A within operating range, VDD = 3.0V to 10V, VSS = 0V, unless otherwise specified
Parameter
Conditions
Min
Typ
Max
Units
Power Supply
3.0
10
V
Average Supply Current, I
DD
All Outputs Bits = Open, Data Out = Open,
BP_Out = Open, Clock In = 0V,
Data In = 0V, Data Load = 0V,
Osc In = 0V, BP_In = 32Hz
V
DD = 3.0V
1.5
2.5
µA
V
DD = 5.0V
10
µA
V
DD = 10.0V
40
µA
Input Voltage Levels
Logic “0”
Logic “1”
Logic “0”
Logic “1”
Load, Clock, Data
V
DD = 5.0V
V
DD = 5.0V
V
DD = 3.0V
V
DD = 3.0V
2.4
2.0
0.9
0.4
V
V
V
V
Output Current Levels
Segments and Data Out
Sink
Source
V
DD = 3.0V, VOUT = 0.3V
V
DD = 3.0V, VOUT = 2.7V
20
20
µA
µA
BP Out Sink
BP Out Source
V
DD = 3.0V, VOUT = 0.3V
V
DD = 3.0V, VOUT = 2.7V
320
320
µA
µA
AC Electrical Characteristics
V
DD
≥ 4.7V, V
SS = 0V unless otherwise specified
Symbol
Parameter
Min
Typ
Max
Units
f
C
Clock Frequency, V
DD = 3V
500
kHz
t
CH
Clock Period High
(Notes 2, 3)
500
ns
t
CL
Clock Period Low
500
ns
t
DS
Data Set-Up before Clock
300
ns
t
DH
Data Hold Time after Clock
100
ns
t
LW
Minimum Load Pulse Width
500
ns
t
LTC
Load to Clock
400
ns
t
CDO
Clock to Data Valid
400
750
ns
Note 1: “Absolute Maximum Ratings” are those values beyond which the safety of the device cannot be guaranteed. They are not meant to imply that the devices
should be operated at these limits. The table of “Electrical Characteristics” specifies conditions of device operation.
Note 2: AC input waveform specification for test purpose: tr ≤ 20 ns, tf ≤ 20 ns, f = 500 kHz, 50% ± 10% duty cycle.
Note 3: Clock input rise and fall times must not excced 300 ms.
Note 4: Output offset voltage is ±50 mV with CSEGMENT = 250 pF, CBP = 8750 pF.
Functional Description
A block diagram for the MM5483 is shown in Figure 1 and a
package pinout is shown in Figure 2. Figure 3 shows a
possible 3-wire connection system with a typical signal for-
mat for Figure 3. Shown in Figure 4, the load input is an
asynchronous input and lets data through from the shift
register to the output buffers any time it is high. The load
input can be connected to V
DD for 2-wire control as shown in
Figure 5. In the 2-wire control mode, 31 bits (or less depend-
ing on the number of segments used) of data are clocked
into the MM5483 in a short time frame (with less than 0.1
second there probably will be no noticeable flicker) with no
more clocks until new information is to be displayed. If data
was slowly clocked in, it can be seen to “walk” across the
display in the 2-wire mode. An AC timing diagram can be
seen in Figure 6. It should be noted that data out is not a
TTL-compatible output.
www.national.com
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