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參數(shù)資料
| 型號： | MAX7300AGL |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 其它接口 |
| 英文描述： | 2-Wire-Interfaced, 2.5V to 5.5V, 20-Port or 28-Port I/O Expander |
| 中文描述： | SPECIALTY INTERFACE CIRCUIT, QCC40 |
| 封裝： | 6 X 6 MM, 0.90 MM HEIGHT, MO-220, QFN-40 |
| 文件頁數(shù)： | 6/22頁 |
| 文件大?。?/td> | 348K |
| 代理商： | MAX7300AGL |
M
2-Wire-Interfaced, 2.5V to 5.5V, 20-Port or
28-Port I/O Expander
6
_______________________________________________________________________________________
Detailed Description
The MAX7300 general-purpose input/output (GPIO)
peripheral provides up to 28 I/O ports, P4 to P31, con-
trolled through an I
2
C-compatible serial interface. The
ports can be configured to any combination of logic
inputs and logic outputs, and default to logic inputs on
power-up.
Figure 1 is the MAX7300 functional diagram. Any I/O port
can be configured as a push-pull output (sinking 10mA,
sourcing 4.5mA), or a Schmitt-trigger logic input. Each
input has an individually selectable internal pullup resis-
tor. Additionally, transition detection allows seven ports
(P24 to P30) to be monitored in any maskable combina-
tion for changes in their logic status. A detected transi-
tion is flagged through a status register bit, as well as an
interrupt pin (port P31), if desired.
The port configuration registers individually set the 28
ports, P4 to P31, as GPIO. A pair of bits in registers
0x09 through 0x0F sets each port
’
s configuration
(Tables 1 and 2).
The 36-pin MAX7300AAX and 40-pin MAX7300AGL
have 28 ports, P4 to P31. The 28-pin MAX7300ANI and
MAX7300AAI have only 20 ports available, P12 to P31.
The eight unused ports should be configured as out-
puts on power-up by writing 0x55 to registers 0x09 and
0x0A. If this is not done, the eight unused ports remain
as floating inputs and quiescent supply current rises,
although there is no damage to the part.
Register Control of I/O Ports
Across Multiple Drivers
The MAX7300 offers 20 or 28 I/O ports, depending on
package choice. Two addressing methods are avail-
able. 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 to P7,
P1 to P8, or P31 to P38 (P32 to P38 are nonexistent, so
the instructions to these bits are ignored).
Shutdown
When the MAX7300 is in shutdown mode, all ports are
forced to inputs, and the pullup current sources are
turned off. Data in the port and control registers remain
unaltered, so port configuration and output levels are
restored when the MAX7300 is taken out of shutdown.
The MAX7300 can still be programmed while in shut-
down mode. For minimum supply current in shutdown
mode, logic inputs should be at GND or V+ potential.
Shutdown mode is exited by setting the S bit in the con-
figuration register (Table 8).
PIN
SSOP/DIP
SSOP
QFN
NAME
FUNCTION
1
1
36
ISET
Bias Current Setting. Connect ISET to GND through a resistor (R
ISET
)
value of 39k
to 120k
.
Ground
2, 3
2, 3
37, 38, 39
GND
4
4
40
AD0
Address Input 0. Sets device slave address. Connect to either GND,
V+, SCL, SDA to give four logic combinations. See Table 3.
5
–
24
—
—
P12
–
P31
I/O P or s. P 12 to P 31 can b e confi g ur ed as p ush- p ul outp uts, C M O S
l og c i np uts, or C M O S og c i np uts w h w eak p ul up r esi stor
—
5
–
32
1
–
10, 12
–
19,
21
–
30
32
33
P4
–
P31
I/O P or s. P4 to P31 can be configured as p ush- p ul outputs, CMOS-
logic inputs, or CMOS-logic inputs with weak pullup resistor.
25
26
33
34
SDA
SCL
I
2
C-Compatible Serial Data I/O
I
2
C-Compatible Serial Clock Input
27
35
34
AD1
Address Input 1. Sets device slave address. Connect to either GND,
V+, SCL, SDA to give four logic combinations. See Table 3.
28
36
35
V+
Positive Supply Voltage. Bypass V+ to GND with minimum 0.047μF
capacitor.
Pin Description
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX7300AGL+T | 功能描述:接口-I/O擴(kuò)展器 RoHS:否 制造商:NXP Semiconductors 邏輯系列: 輸入/輸出端數(shù)量: 最大工作頻率:100 kHz 工作電源電壓:1.65 V to 5.5 V 工作溫度范圍:- 40 C to + 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:HVQFN-16 封裝:Reel |
| MAX7300AGL-T | 功能描述:接口-I/O擴(kuò)展器 2.5-5.5V 20/28 Port I/O Expander RoHS:否 制造商:NXP Semiconductors 邏輯系列: 輸入/輸出端數(shù)量: 最大工作頻率:100 kHz 工作電源電壓:1.65 V to 5.5 V 工作溫度范圍:- 40 C to + 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:HVQFN-16 封裝:Reel |
| MAX7300AGL-TG068 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX7300ANI | 功能描述:接口-I/O擴(kuò)展器 RoHS:否 制造商:NXP Semiconductors 邏輯系列: 輸入/輸出端數(shù)量: 最大工作頻率:100 kHz 工作電源電壓:1.65 V to 5.5 V 工作溫度范圍:- 40 C to + 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:HVQFN-16 封裝:Reel |
| MAX7300ANI+ | 功能描述:接口-I/O擴(kuò)展器 Integrated Circuits (ICs) RoHS:否 制造商:NXP Semiconductors 邏輯系列: 輸入/輸出端數(shù)量: 最大工作頻率:100 kHz 工作電源電壓:1.65 V to 5.5 V 工作溫度范圍:- 40 C to + 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:HVQFN-16 封裝:Reel |
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