BU8272GUW Datasheet, PDF (1/18 Pages) Rohm – GPIO Expander IC

GPIO ICs Series
GPIO Expander IC
BU8272GUW
No.09098EAT01
●Description
GPIO expander is useful especially for the application that is in short of IO ports.
It can
1. Control GPIO output states by I²C write protocol.
2. Know GPIO input states by I²C read protocol.
Furthermore,it has the interrupt function that can release CPU from polling the registers in the GPIO expander.
GPIO expander are also equipped with Built-in power on reset, 3V tolerant input,and NMOS open-drain output.
●Features
1) 400Kbps, 2-Wire serial interface
2) Interrupt output
3) 20-bit General purpose input/output interface
8-bit and 12-bit IO groups are designed for different power supply
voltages from the device core voltage supply
● Absolute Maximum Ratings
(Ta=25℃)
Item
Symbol
Value
Unit
VDD
-0.3 ~ +2.5
V
Supply Voltage
VDDI2C
-0.3 ~ +3.5
V
VDDIO
-0.3 ~ +3.5
V
-0.3 ~ VDD +0.5 ^*1
V
Input voltage
VI
-0.3 ~ VDDI2C +0.5 ^*1
V
-0.3 ~ VDDIO +0.5 ^*1
V
Storage temperature range
Tstg
-55 ~ +125
o_C
Package power
PD
310
*2
mW
*1 _{The input voltage range doesn't exceed absolute maximum ratings even including +0.5 V.}
*2 _{Package dissipation will be reduced each 3.1mW/} o_{C when the ambient temperature increases beyond 25} o_C.
This IC is not designed to be X-ray proof.
comment
-
-
-
CMOS Core
CMOS I/O for 2-Wire
CMOS I/O
-
-
● Recommended Operating Conditions
(Ta=-25 ^oC ~+85 ^oC)
Item
Supply voltage (VDD）
Supply voltage（VDDI2C）
Supply voltage（VDDIO1）
Supply voltage（VDDIO2）
2-Wire operating Frequency
Symbol
V_VDD
V_VDDI2C
V_VDDIO1
V_VDDIO2
F_I2C
Min
1.65
1.65
1.65
1.65
-
Limit
Typ
1.80
-
-
-
-
Max
1.95
3.45
3.45
3.45
400
Unit
Condition
V
Core
V
2-Wire,INT,ADR, XRST
V
GPIO[7:0]
V
GPIO[19:8]
KHz
Slave
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2009.09 - Rev.A