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參數(shù)資料
| 型號： | MAX7323AEE+T |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 14/17頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC I/O EXPANDER I2C 4B 16QSOP |
| 產品培訓模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標準包裝： | 2,500 |
| 接口： | I²C |
| 輸入/輸出數(shù)： | 4 |
| 中斷輸出： | 是 |
| 頻率 - 時鐘： | 400kHz |
| 電源電壓： | 1.71 V ~ 5.5 V |
| 工作溫度： | -40°C ~ 125°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 16-SSOP（0.154"，3.90mm 寬） |
| 供應商設備封裝： | 16-QSOP |
| 包裝： | 帶卷 (TR) |
| 包括： | POR |
MAX7323
Any of the four open-drain ports can be configured as a
logic input by setting the port output logic-high (logic-
high for an open-drain output is high impedance).
When the MAX7323 is read through the serial interface,
the actual logic levels at the ports are read back.
The four ports offer latching transition detection func-
tionality. All input ports are continuously monitored for
changes. An input change sets 1 of 4 flag bits that
identify changed input(s). All flags are cleared upon a
subsequent read or write transaction to the MAX7323.
A latching interrupt output, INT, automatically flags data
changes on any of the I/O ports used as inputs. The
interrupt output INT, and all transition flags are
deasserted when the MAX7323 is next accessed
through the serial interface.
Internal pullup resistors to V+ are selected by the
address select inputs, AD0 and AD2. Pullups are
enabled on the input ports in groups of two (see Table 3).
Use the slave address selection to ensure that I/O ports
used as inputs are logic-high on power-up. I/O ports with
internal pullups enabled default to a logic-high output
state. I/O ports with internal pullups disabled default to
a logic-low output state. Output port power-up logic
states are selected by the address select inputs AD0
and AD2. Ports default to logic-high or logic-low on
power-up in groups of two (see Table 3).
Initial Power-Up
On power-up, the transition detection logic is reset, and
INT is deasserted. The interrupt mask register is set to
0x3C, enabling the interrupt output for transitions on all
four input ports. The transition flags are cleared to indi-
cate no data changes. The power-up default state of the
four push-pull outputs is set according to the I2C slave
address selection inputs, AD0 and AD2 (see Table 3).
Power-On Reset
The MAX7323 contains an integral power-on-reset
(POR) circuit that ensures all registers are reset to a
known state on power-up. When V+ rises above VPOR
(1.6V max), the POR circuit releases the registers and
2-wire interface for normal operation. When V+ drops to
less than VPOR, the MAX7323 resets all ports to the
POR defaults (see Table 3).
RST Input
The active-low RST input operates as a reset that voids
any current I2C transaction involving the MAX7323,
forcing the MAX7323 into the I2C STOP condition. The
reset action does not clear the interrupt output (INT).
Standby Mode
When the serial interface is idle, the MAX7323 automati-
cally enters standby mode, drawing minimal supply
current.
I2C Port Expander with 4 Push-Pull Outputs
and 4 Open-Drain I/Os
6
_______________________________________________________________________________________
PART
I2C
SLAVE
ADDRESS
INPUTS
INPUT
INTERRUPT
MASK
OPEN-
DRAIN
OUTPUTS
PUSH-
PULL
OUTPUTS
APPLICATION
MAX7323
110xxxx
Up to 4
—
Up to 4
4
4 I/O, 4 output-only versions:
4 open-drain I/O ports with latching transition
detection interrupt and selectable pullups.
4 push-pull outputs with selectable power-up default
levels.
MAX7328
MAX7329
0100xxx
0111xxx
Up to 8
—
Up to 8
—
8 open-drain I/O ports with nonlatching transition
detection interrupt and pullups on all ports.
All ports power up as inputs (or logic-high outputs).
Any port can be used as an input by setting the
open-drain output to logic-high.
16-PORT EXPANDERS
MAX7324
8
Yes
—
8
Software equivalent to a MAX7320 plus a MAX7319.
MAX7325
Up to 8
—
Up to 8
8
Software equivalent to a MAX7320 plus a MAX7321.
MAX7326
4
Yes
—
12
Software equivalent to a MAX7320 plus a MAX7322.
MAX7327
101xxxx
and
110xxxx
Up to 4
—
Up to 4
12
Software equivalent to a MAX7320 plus a MAX7323.
Table 1. MAX7319–MAX7329 Family Comparison (continued)
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MAX7323ATE | 功能描述:接口-I/O擴展器 I2C Port Expander w/4 P-P Out & 4 I/O 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 安裝風格:SMD/SMT 封裝 / 箱體:HVQFN-16 封裝:Reel |
| MAX7323ATE+ | 功能描述:接口-I/O擴展器 I2C Port Expander w/4 P-P Out & 4 I/O 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 安裝風格:SMD/SMT 封裝 / 箱體:HVQFN-16 封裝:Reel |
| MAX7323ATE+T | 功能描述:接口-I/O擴展器 I2C Port Expander w/4 P-P Out & 4 I/O 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 安裝風格:SMD/SMT 封裝 / 箱體:HVQFN-16 封裝:Reel |
| MAX7323ATE-T | 功能描述:接口-I/O擴展器 I2C Port Expander w/4 P-P Out & 4 I/O 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 安裝風格:SMD/SMT 封裝 / 箱體:HVQFN-16 封裝:Reel |
| MAX7324 | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:I2C Port Expander with Eight Push-Pull Outputs and Eight Inputs |
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