參數(shù)資料
型號: PCA9554TS,118
廠商: NXP Semiconductors
文件頁數(shù): 6/35頁
文件大小: 0K
描述: IC I/O EXPANDER I2C 8B 20SSOP
標準包裝: 1
接口: I²C,SM 總線
輸入/輸出數(shù): 8
中斷輸出:
頻率 - 時鐘: 400kHz
電源電壓: 2.3 V ~ 5.5 V
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 20-LSSOP(0.173",4.40mm 寬)
供應(yīng)商設(shè)備封裝: 20-SSOP
包裝: 剪切帶 (CT)
包括: POR
其它名稱: 568-2026-1
PCA9554_9554A
All information provided in this document is subject to legal disclaimers.
NXP B.V. 2013. All rights reserved.
Product data sheet
Rev. 9 — 19 March 2013
14 of 35
NXP Semiconductors
PCA9554; PCA9554A
8-bit I2C-bus and SMBus I/O port with interrupt
[1]
VDD must be lowered to 0.2 V for at least 5 s in order to reset part.
[2]
Each I/O must be externally limited to a maximum of 25 mA and the device must be limited to a maximum current of 100 mA.
[3]
The total current sourced by all I/Os must be limited to 85 mA.
10. Dynamic characteristics
[1]
tVD;ACK = time for Acknowledgement signal from SCL LOW to SDA (out) LOW.
[2]
tVD;DAT = minimum time for SDA data output to be valid following SCL LOW.
[3]
Cb = total capacitance of one bus line in pF.
Select inputs A0, A1, A2
VIL
LOW-level input voltage
0.5
-
0.8
V
VIH
HIGH-level input voltage
2.0
-
5.5
V
ILI
input leakage current
1-
1
A
Table 10.
Static characteristics …continued
VDD = 2.3 V to 5.5 V; VSS =0V; Tamb = 40 C to +85 C; unless otherwise specified.
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
Table 11.
Dynamic characteristics
Symbol
Parameter
Conditions
Standard-mode
I2C-bus
Fast-mode I2C-bus
Unit
Min
Max
Min
Max
fSCL
SCL clock frequency
0
100
0
400
kHz
tBUF
bus free time between a STOP and
START condition
4.7
-
1.3
-
s
tHD;STA
hold time (repeated) START condition
4.0
-
0.6
-
s
tSU;STA
set-up time for a repeated START
condition
4.7
-
0.6
-
s
tSU;STO
set-up time for STOP condition
4.0
-
0.6
-
s
tHD;DAT
data hold time
0
-
0
-
s
tVD;ACK
data valid acknowledge time
0.3
3.45
0.1
0.9
s
tVD;DAT
data valid time
300
-
50
-
ns
tSU;DAT
data set-up time
250
-
100
-
ns
tLOW
LOW period of the SCL clock
4.7
-
1.3
-
s
tHIGH
HIGH period of the SCL clock
4.0
-
0.6
-
s
tr
rise time of both SDA and SCL signals
-
1000
20 + 0.1Cb[3]
300
ns
tf
fall time of both SDA and SCL signals
-
300
20 + 0.1Cb[3]
300
ns
tSP
pulse width of spikes that must be
suppressed by the input filter
-
50
-
50
ns
Port timing
tv(Q)
data output valid time
-
200
-
200
ns
tsu(D)
data input set-up time
100
-
100
-
ns
th(D)
data input hold time
1
-
1
-
s
Interrupt timing
tv(INT_N)
valid time on pin INT
-4
-
4
s
trst(INT_N)
reset time on pin INT
-4
-
4
s
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