参数资料
| 型号： | MAX6952EAX+T |
| 厂商： | Maxim Integrated |
| 文件页数： | 5/21页 |
| 文件大小： | 0K |
| 描述： | IC DRVR DSPL LED 36-SSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1,000 |
| 显示器类型： | LED |
| 配置： | 5 x 7（矩阵） |
| 接口： | 4 线串行 |
| 数字或字符： | 4 位数字 |
| 电流 - 电源： | 12mA |
| 电源电压： | 2.7 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 36-BSOP（0.295"，7.50mm 宽） |
| 供应商设备封装： | 36-SSOP |
| 包装： | 带卷 (TR) |
4-Wire Interfaced, 2.7V to 5.5V,
4-Digit 5 ? 7 Matrix LED Display Driver
Pin Description
SSOP
1, 2, 3, 6 – 14, 23, 24
4, 5, 16
15
17
18
PIN
PDIP
1, 2, 3, 7 – 15, 26, 27
4, 5, 6, 18
17
19
20
NAME
O0 to O13
GND
ISET
BLINK
DIN
FUNCTION
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 SET to set the peak current.
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
19
21
CLK
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
20
22
DOUT
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
21
23
CS
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
22
24
OSC
capacitor C SET from OSC to GND. To use the external
clock, drive OSC with a 1MHz to 8MHz CMOS clock.
25 – 31, 34, 35, 36
32, 33
28 – 34, 38, 39, 40
35, 36, 37
O14 to O23
V+
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.
Detailed Description
The MAX6952 is a serially interfaced display driver that
can drive four digits of 5 ? 7 cathode-row dot-matrix
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.
Serial Interface
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.
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