TB62785NG,TB62785FTG
TOSHIBA Bi-CMOS INTEGRATED CIRCUIT SILICON MONOLITHIC
TB62785NG, TB62785FTG
7-SEGMENT DRIVERS WITH BUILT-IN DECODERS
(COMMON ANODE CAPABILITY, MAXIMUM 4-DIGIT CONTROL)
TB62785NG
The TB62785NG / TB62785FTG are multifunctional, compact,
7-egment LED display drivers.
These ICs can directly drive 7-segment displays and individual
LEDs, and can control either a 4-digit display with decimal points, or
32 individual LEDs.
These ICs can also be used with common-anode displays. Their
outputs are constant current, the ampere levels at which are set
using an external resistor.
A synchronous serial port connects the IC to the CPU.
The different modes of control provided by this device including
Duty Control Register Set, Digit Set, Decode Set and Standby Set,
are all based on every 16-bit of serial data.
SDIP24-P-300-1.78
Weight 1.22g (typ.)
FEATURES
Control circuit power supply
:
V
DD
= 4.5 to 5.5 V
Digit output rating
:
17 V / -400 mA
Decoder output rating
:
17 V / 50 mA
Built-in decoder
:
Decodes the numerals 0 to 9, certain alphabetic
characters, and of course blanks code.
Digit control function
:
Can scan digit outputs DIG-0 to DIG-3 when connected
to the common anode pins of a 7-segment display.
Maximum transmission frequency
:
f
CLK
= 15 MHz
TB62785FTG
P-VQFN24-0404-0.50-001
Weight 0.037g (typ.)
Decoder outputs (OUT-a to OUT-Dp)
Output current can be set up to a 40mA maximum using an external resistor.
Constant current tolerance (Ta = 25°C, V
DD
= 5.0 V)
:
Variation between bits = ±7%, variation between devices
(including variation between bits) = ±15% at V
CE
≥ 0.7 V
Package
:
TB62785NG
:
TB62785FTG
SDIP24-P-300-1.78
P-VQFN24-0404-0.50-001
1
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TB62785NG,TB62785FTG
PIN ASSIGNMENT
(Top view)
< TB62785NG (SDIP24) >
V
DD
DATA-IN
CLOCK
LOAD
OUT-f
OUT-g
OUT-e
OUT-d
OUT-Dp
1
2
3
4
5
6
7
8
9
24 L-GND
23 DATA-OUT
22 R-EXT
21 P-GND
20 DIG-3
TOP VIEW
19 DIG-2
18 V
CC
17 DIG-1
16 DIG-0
15 TEST-IN1
14 TEST-IN2
13 P-GND
OUT-c 10
OUT-b 11
OUT-a 12
< TB62785FTG (VQFN24) >
18 P-GND
17 DIG-3
16 DIG-2
14 DIG-1
5
1
2
3
4
5
13 DIG-0
15 V
CC
(Note)
1
2
4
3
5
*Note: VDD and L-GND are adjacent in TB62785FTG. (21pin / 22pin)
Please be careful.
OUT-Dp 6
LOAD 1
OUT-f 2
OUT-g 3
OUT-e 4
OUT-d 5
5
2
1
1
CLOCK 24
2
2
DATA-IN 23
3
3
V
DD
22
TOP VIEW
4
4
(Note)
L-GND 21
5
5
DATA-OUT 20
5
5
R-EXT 19
12 TEST-IN1
11 TEST-IN2
10 P-GND
9
8
7
OUT-a
OUT-b
OUT-c
2015-01-07
TB62785NG,TB62785FTG
BLOCK DIAGRAM
V
CC
V
DD
DATA-IN
CLOCK
DATA-OUT
16bit Shift Register
16
LOAD
16bit D-type Latch
8 (D0~D7)
Latch Selector & LOAD pulse Dstributer
4
Internal
OSC
8 (D8~D15)
8bit D-type Latch for Digit-A
8
4
Digit-Limit Controller
8bit D-type Latch for Digit-B
8
4
Duty-Controller
8bit D-type Latch for Digit-C
8
4
Data-Selector (Decode or No Decode)
8bit D-type Latch for Digit-D
8
4
4
4
4
4
4
4
4
4
Stand-by Mode Controller
Octal 4tol Data Selector
TEST-IN1
TEST-IN2
8
BINARY to 7-Segment
Decoder
8
Octal 2tol Data Selector
8
R-EXT OUTa~Dp
2
P-GND
L-GND
No Decode
Data
2
8
8bit Bipolar
Constant-Current
Sink Driver
4bit Bipolar
Digit
Source Driver
4
DIG-0~3
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TB62785NG,TB62785FTG
PIN FUNCTIONS
TB62785NG (SDIP24)
PIN
NUMBER
1
2
3
4
I/O
(Note)
P
I
I
I
PIN NAME
V
DD
DATA-IN (DI)
CLOCK (CK)
LOAD (LD)
5 V power pin.
Serial data input pin.
FUNCTION
Clock input pin. The shift register shifts data on the clock's rising edge.
Load signal input pin. The data in the D
8
to D
15
are read on the rising edge and
the load register is selected. And, the data of the D
0
to D
7
which corresponded
each register on the falling edge.
Segment drive output pins. The a to Dp outputs correspond to the seven
segments. These pins output constant sink current. Connect each of these pins
to the corresponding LED's cathode.
Ground pins, There are two which can be used to ground the output OUT-a to
OUT-Dp pins.
Product test pin. In normal use, be sure to connect to ground.
Product test pin. In normal use, be sure to connect to ground.
Digit output pins. Each of these pins can control one of the four seven-segment
digits in a display.
These pins output the V
CC
pin voltage as a source current output. Connect
these pins to the LED anodes.
Power pin for digit output.
Current setting pin for the OUT-a to OUT-Dp pins. Connect a resistor between
this pin and ground when setting the current.
Serial data output pin. Use when TB62785NG/ TB62785FTG device is used in
cascade connections.
Ground pin for logic and analog circuits.
5 to 12
O
OUT-a to
OUT-Dp
P-GND
TEST-IN2
TEST-IN1
13, 21
14
15
P
I
I
16, 17, 19, 20
O
DIG-0 to DIG-3
18
22
23
24
P
O
O
P
V
CC
R-EXT
DATA-OUT (DO)
L-GND
*Note Explanation of I/O: I = Input Terminal, O = Output Terminal, P = Power Supply
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2015-01-07
TB62785NG,TB62785FTG
TB62785FTG (VQFN24)
PIN
NUMBER
I/O
(Note)
PIN NAME
FUNCTION
Load signal input pin. The data in the D
8
to D
15
are read on the rising edge and
the load register is selected. And, the data of the D
0
to D
7
which corresponded
each register on the falling edge.
Segment drive output pins. The A to Dp outputs correspond to the seven
segments. These pins output constant sink current. Connect each of these pins
to the corresponding LED's cathode.
Ground pins, There are two which can be used to ground the output OUT-a to
OUT-Dp pins.
Product test pin. In normal use, be sure to connect to ground.
Product test pin. In normal use, be sure to connect to ground.
Digit output pins. Each of these pins can control one of the four seven-segment
digits in a display.
These pins output the V
CC
pin voltage as a source current output. Connect
these pins to the LED anodes.
Power pin for digit output.
Current setting pin for the OUT-a to OUT-Dp pins. Connect a resistor between
this pin and ground when setting the current.
1
I
LOAD (LD)
2 to 9
O
OUT-a to D
p
10, 18
11
12
P
I
I
P-GND
TEST-IN2
TEST-IN1
13, 14, 16, 17
O
DIG-0 to DIG-3
15
19
20
21
22
23
24
P
O
O
P
P
I
I
V
CC
R-EXT
Serial data output pin. Use when TB62785NG/TB62785FTG device is used in
DATA-OUT (DO) cascade connections.
L-GND
V
DD
DATA-IN (DI)
CLOCK (CK)
Ground pin for logic and analog circuits.
5 V power pin.
Serial data input pin.
Clock input pin. The shift register shifts data on the clock's rising edge.
*Note Explanation of I/O: I = Input Terminal, O = Output Terminal, P = Power Supply
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2015-01-07
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