MAX1366ECM Maxim Integrated, MAX1366ECM Datasheet - Page 11

• Manufacturer Part Number: MAX1366ECM
• Description: LED Display Drivers
• Manufacturer: Maxim Integrated

PIN
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
Microcontroller-Interface, 4.5-/3.5-Digit Panel
LOWBATT
LED_EN
SEGDP
NAME
DOUT
SEGC
SEGD
SEGG
NEGV
SCLK
LEDG
SEGA
SEGB
SEGE
SEGF
LEDV
REF+
DIG0
DIG1
DIG2
DIG3
DIG4
REF-
DIN
______________________________________________________________________________________
CS
Serial Clock Input. Apply an external clock to SCLK to facilitate communication through the serial
bus. SCLK may idle high or low.
Serial Data Output. DOUT presents serial data in response to register queries. Data shifts out on
the falling edge of SCLK. DOUT goes high impedance when CS is high.
Serial Data Input. Data present at DIN is shifted into the internal registers in response to a rising
edge at SCLK when CS is low.
Active-Low Chip-Select Input. Forcing CS low activates the serial interface. (See Table 8.)
LED Segment-Drivers Ground
Digit 0 Driver Out (Connected to GLED for the MAX1368)
Digit 1 Driver Out
Digit 2 Driver Out
Digit 3 Driver Out
Digit 4 Driver Out
Segment A Driver
Segment B Driver
LED-Display Segment-Driver Supply. Connect to a +2.7V to +5.25V supply. Bypass with a 0.1µF
capacitor to LEDG.
Segment C Driver
Segment D Driver
Segment E Driver
Segment F Driver
Segment G Driver
Segment Decimal-Point Driver
Active-High LED Enable. The MAX1366/MAX1368 display driver turns off when LED_EN is low.
The MAX1366/MAX1368 LED-display driver turns on when LED_EN is high.
-2.5V Charge-Pump Voltage Output. Connect a 0.1µF capacitor to GND.
Low-Battery-Voltage Monitor. When the LOWBATT input voltage is lower than 2.048V, the
LOWBATT bit in the status register is set to one.
Negative Reference Voltage Input. For internal reference operation, connect REF- to GND. For
external reference operation, bypass REF- to GND with a 0.1µF capacitor and
set V
Positive Reference Voltage Input. For internal reference operation, connect a 4.7µF capacitor from
REF+ to GND. For external reference operation, bypass REF+ to GND with a 0.1µF capacitor and
set V
REF-
REF+
from -2.2V to +2.2V (V
from -2.2V to +2.2V, provided that V
Meters with 4–20mA Output
REF+
> V
REF-
FUNCTION
).
REF+
Pin Description (continued)
> V
REF-
.
11