Document
TB62710P/F/FN
TOAHIBA Bi-CMOS Integrated Circuit Silicon Monolithic
TB62710P, TB62710F, TB62710FN
8-Bit Constant-Current LED Driver for Cathode Common LED
The TB62710P, TB62710F and TB62710FN are specifically designed for use as LED and LED display (cathode-common) Constant-current drivers. The constant-current output circuits can be set up using an external resistor (IOUT = −90 mA max).
These ICs are monolithic integrated circuits have been designed using the Bi-CMOS process.
The devices consist of an 8-bit shift register, a latch, an ANDgate and constant-current drivers.
FEATURES
· Constant-current output:
A single resistor can be used to set any output current in the range −5~−90 mA.
· Maximum clock frequency: fCLK = 15 MHz (operating while connected in cascade, Topr = 25°C)
· 5-V CMOS compatible input · Packages:
P-type: DIP20-P-300-2.54A
F-type: SSOP24-P-300-1.00
FN-type: SSOP20-P-225-0.65A
· Constant-output-current accuracy:
Output − GND Voltage
Current accuracy
between bits
between ICs
Output Current (max)
≥ 2.0 V (min) ≥ 1.5 V (min)
±6%
±15%
−5~−90 mA −5~−40 mA
TB62710P TB62710F TB62710FN
Weight DIP20-P-300-2.54A: 2.25 g (Typ.) SSOP24-P-300-1.00: 0.33 g (Typ.) SSOP20-P-225-0.65A: 0.10 g (Typ.)
1 2002-01-31
Pin Assignment (top view)
GND SERIAL-IN
CLOCK LATCH
NC VCC OUT0 OUT1 OUT2 OUT3
P- & FN-types
VDD R-EXT SERIAL-OUT1 ENABLE SERIAL-OUT2 VCC OUT7 OUT6 OUT5 OUT4
GND SERIAL-IN
CLOCK NC
LATCH NC VCC NC
OUT0 OUT1 OUT2 OUT3
Block Diagram
OUT0
OUT1
F-type
TB62710P/F/FN
VDD R-EXT SERIAL-OUT1 ENABLE SERIAL-OUT2 NC VCC NC OUT7 OUT6 OUT5 OUT4
OUT7
R-EXT ENABLE
LATCH
I-REG
VCC
VCC
Q ST D
Q ST D
SERIAL-IN CLOCK
DQ CK
DQ CK
VCC
Q ST D
DQ CK DQ CK
SERIAL-OUT2 SERIAL-OUT1
Truth Table
CLOCK
LATCH
ENABLE
SERIAL-IN
OUT0… OUT5 … OUT7
SERIAL-OUT
H L Dn
Dn … Dn - 5 … Dn - 7
Dn - 7
L L Dn + 1
No Change
Dn - 6
H
L
Dn + 2
Dn + 2 … Dn - 3 … Dn - 5
Dn - 5
X
L
Dn + 3
Dn + 2 … Dn - 3 … Dn - 5
Dn - 5
X H Dn + 3
OFF
Dn - 5
Note 1: OUT0~OUT7 = ON when Dn = “H”; OUT0~OUT7 = OFF when Dn = “L”. In order to ensure that the level of the power supply voltate is correct, an external resistor must be connected between R-EXT and GND.
2 2002-01-31
Timing Diagram
TB62710P/F/FN
n=1
2
3
4
5
6
7
8
CLOCK
SERIAL-IN
LATCH
ENABLE
OUT0
OFF
5V 0V 5V 0V 5V 0V 5V 0V
OUT1
OFF
ON OFF
OUT6
OFF
OUT7 SERIAL-OUT1 SERIAL-OUT2
OFF
ON OFF
5V 0V 5V 0V
Note 2:
The latches circuit holds data by pulling the LATCH terminal Low. And, when LATCH terminal is a “H” level, latch circuit doesn’t hold data, and it passes from the input to the output. When ENABLE terminal is a “L” level, output terminal OUT0~ OUT7 respond to the data, and on & off does. And, when ENABLE terminal is a “H” level, it offs with the output terminal regardless of the data.
3 2002-01-31
TB62710P/F/FN
Terminal Description
Pin No. P/FN-Type F-Type
11 22 33
45
6, 15 7~14
7, 18 9~16
17 21
16 20
18 22
19 23
20 24
5
4, 6, 8, 17, 19
.