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参数资料
| 型号： | MAX6957ATL+T |
| 厂商： | Maxim Integrated |
| 文件页数： | 6/25页 |
| 文件大小： | 0K |
| 描述： | IC DRVR DSPL LED 40-TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 显示器类型： | LED |
| 配置： | 7、16、20 段 |
| 接口： | 4 线串行 |
| 电流 - 电源： | 180µA |
| 电源电压： | 2.5 V ~ 5.5 V |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 40-WFQFN 裸露焊盘 |
| 供应商设备封装： | 40-TQFN-EP（6x6） |
| 包装： | 带卷 (TR) |
4-Wire-Interfaced, 2.5V to 5.5V, 20-Port and
28-Port LED Display Driver and I/O Expander
Table 1. Port Configuration Map
REGISTER
ADDRESS
CODE (HEX)
D7
D6
D5
REGISTER DATA
D4 D3
D2
D1
D0
Port Configuration for P7, P6, P5, P4
Port Configuration for P11, P10, P9, P8
Port Configuration for P15, P14, P13, P12
Port Configuration for P19, P18, P17, P16
Port Configuration for P23, P22, P21, P20
Port Configuration for P27, P26, P25, P24
Port Configuration for P31, P30, P29, P28
0x09
0x0A
0x0B
0x0C
0x0D
0x0E
0x0F
P7
P11
P15
P19
P23
P27
P31
P6
P10
P14
P18
P22
P26
P30
P5
P9
P13
P17
P21
P25
P29
P4
P8
P12
P16
P20
P24
P28
Table 2. Port Configuration Matrix
MODE
FUNCTION
PORT
REGISTER
(0x20–0x5F)
PIN BEHAVIOR
ADDRESS
CODE (HEX)
PORT
CONFIGURATION
BIT PAIR
(0xA0–0xDF)
Register bit = 0
High impedance
UPPER
LOWER
Output
LED Segment Driver
Register bit = 1
Open-drain current sink, with sink
current (up to 24mA) determined
0x09 to 0x0F
0
0
by the appropriate current register
Output
Input
Input
GPIO Output
GPIO Input
Without Pullup
GPIO Input with
Register bit = 0
Register bit =
input logic level
Active-low logic output
Active-high logic output
Schmitt logic input
Schmitt logic input with pullup
0x09 to 0x0F
0x09 to 0x0F
0x09 to 0x0F
0
1
1
1
0
1
Note: The logic is inverted between the two output modes; a high makes the output go low in LED segment driver mode (0x00) to
turn that segment on; in GPIO output mode (0x01), a high makes the output go high.
Register Control of I/O Ports and LEDs
Across Multiple Drivers
The MAX6957 offers 20 or 28 I/O ports, depending on
package choice. These can be applied to a variety of
combinations of different display types, for example:
seven, 7-segment digits ( Figure 2). This example
requires two MAX6957s, with one digit being driven by
both devices, half by one MAX6957, half by the other
(digit 4 in this example). The two drivers are static, and
therefore do not need to be synchronized. The
MAX6957 sees CA digits as multiple discrete LEDs. To
simplify access to displays that overlap two MAX6957s,
the MAX6957 provides four virtual ports P0 through P3.
To update an overlapping digit, send the same code
twice as an eight-port write, once to P28 through P35 of
the first driver, and again to P0 through P7 of the sec-
ond driver. The first driver ignores the last 4 bits and
the second driver ignores the first 4 bits.
Two addressing methods are available. Any single port
(bit) can be written (set/cleared) at once; or, any
sequence of eight ports can be written (set/cleared) in
any combination at once. There are no boundaries; it is
equally acceptable to write P0 through P7, P1 through
P8, or P31 through P38 (P32 through P38 are nonexis-
tent, so the instructions to these bits are ignored).
Using 8-bit control, a seven-segment digit with a deci-
mal point can be updated in a single byte-write, a 14-
segment digit with DP can be updated in two
byte-writes, and 16-segment digits with DP can be
updated in two byte-writes plus a bit write. Also, dis-
crete LEDs and GPIO port bits can be lit and controlled
individually without affecting other ports.
6
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| MAX6958AAEE-T | 功能描述:LED显示驱动器 3-5.5V 4-Digit 9-Seg LED Display Driver RoHS:否 制造商:Micrel 数位数量:5 片段数量: 安装风格:SMD/SMT 封装 / 箱体:PLCC-44 工作电源电压:4.75 V to 11 V 最大电源电流:10 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装:Tube |
| MAX6958AAPE | 功能描述:LED显示驱动器 RoHS:否 制造商:Micrel 数位数量:5 片段数量: 安装风格:SMD/SMT 封装 / 箱体:PLCC-44 工作电源电压:4.75 V to 11 V 最大电源电流:10 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装:Tube |
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