TP6312
1/4 TO 1/11-DUTY VFD CONTROLLER/DRIVER
Transmission (data read)
Because the DOUT pin is an N-ch open-drain output
pin, be sure to connect an external pull-up resistor to
this pin (1kΩ to 10 kΩ).
STB
DIN
CLK
b0
b1
b2
b3
b4
b5
b6
b7
*: When data is read, a wait time (tWAIT) of 1µs is
1
2
3
4
5
6
7
8
1
2
3
4
5
6
t
WAIT
necessary from the rising of the eighth clock that has
set the command till the falling of the first clock that
has read the data.
DOUT
b0
b1
b2
b3
b4
b5
Data reading command is set.
Data reading starts.
Absolute Maximum Ratings (Ta = 25°C, Vss = 0V)
Parameter
Symbol
VDD
VEE
Vi1
Vo2
Ratings
-0.5 to + 7.0
VDD +0.5 to VDD -40
-0.5 to VDD +0.5
VEE –0.5 to VDD +0.5
+25
Unit
V
V
V
V
Logic Supply Voltage
Driver Supply Voltage
Logic Input Voltage
VFD Driver Output Voltage
LED Driver Output Current
Io1
mA
-40 (grid)
VFD Driver Output Current
Io2
mA
-15 (segment)
Power Dissipation
Operating Ambient Temperature
Storage Temperature
PD
Topt
Tstg
800*
mW
℃
-40 to +70
℃
-65 to +150
* Derate at –6.4 mW/℃ at Ta = 25℃ or higher.
Recommended Operating Conditions (Ta = -20°C to +70°C, Vss = 0V)
Parameter
Symbol
VDD
VIH
VIL
VEE
Min.
4.5
0.7VDD
0
Typ.
5
Max.
5.5
VDD
0.3VDD
VDD-35
Unit Test Condition
Logic Supply Voltage
High-Level input Voltage
Low-Level input Voltage
Driver Supply Voltage
V
V
V
V
0
Maximum power consumption PMAX = VFD driver dissipation + RL dissipation + LED driver dissipation + dynamic power
consumption.
Where segment current = 3 mA, grid current = 15mA, and LED current = 20 mA,
VFD driver dissipation = number of segments x 6 + number of grids/(number of grids + 1) x 30(mW)
RL dissipation ≒ (VDD-VEE)2/50 x (segment+1) (mW)
LED driver dissipation = number of LEDs x 20(mW)
Dynamic power consumption = VDD x 5(mW)
Electrical Characteristics (Ta = -20°C to +70°C, VDD = 4.5V to 5.5V, VS = 0V, VEE = VDD - 35V)
Parameter
Symbol
VOH1
VOL1
VOL2
IOH21
Min
0.9 VDD
Typ.
Max.
Unit
V
V
V
mA
Test Conditions
LED1 – LED4, IOH1 = -1 mA
LED1 – LED4, IOL1 = 20 mA
DOUT, IOL2 = 4 mA
VO = VDD –2V, Seg1 to Seg11
VO = VDD –2V,Grid1 to Grid6,
Seg12/Seg 11 to Seg16/Seg 7
VO = VDD - 35V, Drive off
Drive output
High-Level Output Voltage
Low-Level Output Voltage
Low-Level Output Voltage
High-Level Output Current
1
0.4
-3
High-Level Output Current
IOH22
-15
mA
Driver Leakage Current
Output Pull-Down Resistor
Input Current
High-Level Input Voltage
Low-Level Input Voltage
Hysteresis Voltage
IOLEAK
RL
Ii
VIH
VIL
VH
-10
150
±1
µA
kΩ
µA
V
V
V
50
100
VI = VDD or VSS
0.6 VDD
0.3 VDD
5
0.35
CLK, DIN, STB
Under no load, display off
Dynamic Current Consumption
IDDdyn
mA
Version 1.1
Page 5 of 9
http://www.topro.com.tw
September 2003
ETC [ ETC ]
