MAX6953 데이터 시트보기 (PDF) - Maxim Integrated
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MAX6953 Datasheet PDF : 23 Pages
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2-Wire Interfaced, 2.7V to 5.5V, 4-Digit 5 ✕ 7
Matrix LED Display Driver
Typical Operating Characteristics (continued)
(Typical application circuit, V+ = 3.3V, LED forward voltage = 2.4V, scan limit set to 4 digits, TA = +25°C, unless otherwise noted.)
DEAD CLOCK OSCILLATOR FREQUENCY
vs. SUPPLY VOLTAGE
105
1.01
OUTPUT SOURCE CURRENT
vs. SUPPLY VOLTAGE
WAVEFORMS AT O2 (PIN 3) AND O14
(PIN 28) V+ = 3.3V, 8/16 INTENSITY
1.00
100
0.99
95
0.98
GROUND FOR
ANODE
90
(PIN 014)
0.97
85
0.96
0.95
GROUND FOR
80
2.5 3.0 3.5 4.0 4.5 5.0 5.5 CATHODE
2.5 3.0 3.5 4.0 4.5 5.0 5.5
SUPPLY VOLTAGE (V)
(PIN 03)
SUPPLY VOLTAGE (V)
200µs/div
PIN
SSOP
PDIP
1, 2, 3, 6–14, 23, 24
1, 2, 3, 7–15, 26, 27
4, 5, 17
4, 5, 6, 19
15
17
16
18
—
16, 25
18
20
19
21
20
21
22
25–31, 34, 35, 36
32, 33
22
23
24
28–34, 38, 39, 40
35, 36, 37
Pin Description
NAME
FUNCTION
O0 to O13
GND
ISET
AD1
N.C.
BLINK
OSC
AD0
SDA
SCL
O14 to O23
V+
LED Cathode Drivers. O0 to O13 outputs sink current from
the display’s cathode rows.
Ground
Segment Current Setting. Connect ISET to GND through
series resistor RSET to set the peak current.
Address Input 1. Sets device slave address. Connect to
either GND, V+, SCL, SDA to give four logic combinations.
See Table 3.
Not Connected
Blink Output. Output is open drain.
Multiplex Clock Input. To use internal oscillator, connect
capacitor CSET from OSC to GND. To use external clock,
drive OSC with a 1MHz to 8MHz CMOS clock.
Address Input 0. Sets device slave address. Connect to
either GND, V+, SCL, SDA to give four logic combinations.
See Table 3.
I2C-Compatible Serial Data I/O
I2C-Compatible Serial Clock Input
LED Anode Drivers. O14 to O23 outputs source current to
the display’s anode columns.
Positive Supply Voltage. Bypass V+ to GND with a 47µF
bulk capacitor and a 0.1µF ceramic capacitor.
_______________________________________________________________________________________ 5
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