MM58241N National Semiconductor, MM58241N Datasheet - Page 4

• Manufacturer Part Number: MM58241N
• Description: IC DISPLAY DRIVER HI VOLT 40-DIP
• Manufacturer: National Semiconductor

Specifications of MM58241N

• Display Type: Vacuum Fluorescent (VF)
• Configuration: Alphanumeric or Dot Matrix
• Interface: Serial
• Current - Supply: 150µA
• Voltage - Supply: 4.5 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Through Hole
• Package / Case: 40-DIP (0.600", 15.24mm)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Digits Or Characters: -
• Other names: *MM58241N

Figure 4 demonstrates the critical timing requirements be-
Functional Description
tween CLOCK and DATA IN for the MM58241
To clear (reset) the display driver at power on or any time
the following flushing routine may be used With the enable
signal high clock in 32 zeroes Drive the enable signal low
and the display will be blank It is recommended to clear the
driver at power on
In Figure 5 the ENABLE signal acts as an envelope and
only while this signal is at a logic ‘1’ does the circuit accept
CLOCK input signals Data is transferred and shifted in the
internal shift register on the rising clock edge i e ‘0’–‘1’
transition When the ENABLE signal goes low the contents
of the shift registers are latched and the display will show
Timing Diagrams
For the purposes of AC measurements V
(Continued)
FIGURE 3a Output Impedance Off
FIGURE 4 Clock and Data Timings
FIGURE 3b Output Impedance On
IH
e
4
2 4V V
Figure 6 shows a schematic diagram of a microprocessor-
new data During data transfer the display will show old
data DATA OUT is also provided on the MM58241 being
output on the falling edge At any time the display may be
blanked under processor control using the BLANKING
CONTROL input
based system where the MM58241 is used to provide the
grid drive for a 32-digit 5 x 7 dot matrix vaccum fluorescent
(VF) display The anode drive in this example is provided by
another member of the high voltage display driver family
namely the MM58248 which does not require an externally
generated load signal
IL
e
0 8V
TL F 5600 – 3
TL F 5600 – 5
TL F 5600 – 4