MAX6952EAX Maxim Integrated Products, MAX6952EAX Datasheet - Page 5

• Manufacturer Part Number: MAX6952EAX
• Description: LED Drivers 5 x 7 Matrix LED Dis play Driver, 4-Digit
• Manufacturer: Maxim Integrated Products

Specifications of MAX6952EAX

• Number Of Digits: 4
• Number Of Segments: 140
• Low Level Output Current: 500000 uA
• High Level Output Current: 50000 uA
• Operating Supply Voltage: 2.7 V to 5.5 V
• Maximum Supply Current: 16000 uA
• Maximum Power Dissipation: 941.2 mW
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: SSOP-36
• Minimum Operating Temperature: - 40 C

The MAX6952 is a serially interfaced display driver that
can drive four digits of 5
displays. The MAX6952 can drive either four monocolor
digits (Table 1) or two bicolor digits (Table 2). The
MAX6952 includes a 128-character font map compris-
ing 104 predefined characters and 24 user-definable
characters. The predefined characters follow the Arial
font, with the addition of the following common sym-
bols: £, €, ¥, °, µ, ±, ↑, and ↓. The 24 user-definable
characters are uploaded by the user into on-chip RAM
through the serial interface and are lost when the
device is powered down. Figure 1 is the MAX6952
functional diagram.
1, 2, 3, 6–14, 23, 24
25–31, 34, 35, 36
4, 5, 16
SSOP
32, 33
15
17
18
19
20
21
22
_______________________________________________________________________________________
PIN
Detailed Description
4-Digit 5
1, 2, 3, 7–15, 26, 27
✕
28–34, 38, 39, 40
7 cathode-row dot-matrix
4, 5, 6, 18
35, 36, 37
PDIP
17
19
20
21
22
23
24
4-Wire Interfaced, 2.7V to 5.5V,
✕
O14 to O23
O0 to O13
7 Matrix LED Display Driver
NAME
BLINK
DOUT
GND
ISET
OSC
CLK
DIN
CS
V+
The MAX6952 communicates through an SPI-compati-
ble 4-wire serial interface. The interface has three
inputs, clock (CLK), chip select (CS), and data in (DIN),
and one output, data out (DOUT). CS must be low to
clock data into or out of the device, and DIN must be
stable when sampled on the rising edge of CLK. DOUT
is stable on the rising edge of CLK. Note that while the
SPI protocol expects DOUT to be high impedance
when the MAX6952 is not being accessed, DOUT on
the MAX6952 is never high impedance.
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 R
Blink Clock Output. Output is open drain.
Serial Data Input. Data is loaded into the internal 16-bit shift
register on the rising edge of the CLK.
Serial-Clock Input. On the rising edge of CLK, data is
shifted into the internal shift register. On the falling edge of
CLK, data is clocked out of DOUT. CLK input is active only
while CS is low.
Serial Data Output. Data clocked into DIN is output to
DOUT 15.5 clock cycles later. Data is clocked out on the
rising edge of CLK. Output is push-pull.
Chip-Select Input. Serial data is loaded into the shift register
while CS is low. The last 16 bits of serial data are latched on
CS’s rising edge.
Multiplex Clock Input. To use the internal oscillator, connect
capacitor C
clock, drive OSC with a 1MHz to 8MHz CMOS clock.
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.
SET
from OSC to GND. To use the external
SET
to set the peak current.
FUNCTION
Pin Description
Serial Interface
5