參數(shù)資料
型號(hào)： PCA9509
廠商： NXP Semiconductors N.V.
英文描述： Level translating I2C-bus/SMBus repeater
中文描述： 級(jí)別翻譯I2C-bus/SMBus中繼器
文件頁(yè)數(shù)： 8/16頁(yè)
文件大?。?/td> 92K
代理商： PCA9509
PCA9509_1
Koninklijke Philips Electronics N.V. 2006. All rights reserved.
Product data sheet
Rev. 01 — 27 June 2006
8 of 16
Philips Semiconductors
PCA9509
Level translating I
2
C-bus/SMBus repeater
[3]
The port A current source has a typical value of about 1 mA, but varies with both V
CC(A)
and V
CC(B)
. Below V
CC(A)
of about 0.7 V the
port A current source current drops to 0 mA. The current source current dropping across the internal pull-down driver resistance of
about 200
defines the V
OL
.
As long as the chip ground is common with the input ground reference the driver resistance may be as large as 120
. However, ground
offset will rapidly decrease the maximum allowed driver resistance.
[4]
[5]
Guaranteed by design.
10. Dynamic characteristics
[1]
Load capacitance = 50 pF; load resistance on port B = 1.35 k
.
[2]
Value is determined by RC time constant of bus line.
Table 5.
Symbol
V
CC(A)
= 1.1 V; V
CC(B)
= 3.3 V
t
PLH
LOW-to-HIGH propagation delay
t
PHL
HIGH-to-LOW propagation delay
t
TLH
LOW to HIGH output transition time
t
THL
HIGH to LOW output transition time
t
PLH
LOW-to-HIGH propagation delay
t
PLH2
LOW to HIGH propagation delay 2
Dynamic characteristics
Parameter
Conditions
Min
Typ
Max
Unit
port B to port A
port B to port A
port A
port A
port A to port B
port A to port B; measured from
the 50 % of initial LOW on port A to
1.5 V rising on port B
port A to port B
port B
port B
EN HIGH before START condition
EN HIGH after STOP condition
[1]
69
109
86
22
8.1
91
153
216
140
96
16
139
226
ns
ns
ns
ns
ns
ns
[1]
63
[1]
14
[1]
5
[1]
69
[1]
91
t
PHL
t
TLH
t
THL
t
su
t
h
V
CC(A)
= 1.9 V; V
CC(B)
= 5.0 V
t
PLH
LOW-to-HIGH propagation delay
t
PHL
HIGH-to-LOW propagation delay
t
TLH
LOW to HIGH output transition time
t
THL
HIGH to LOW output transition time
t
PLH
LOW-to-HIGH propagation delay
t
PLH2
LOW to HIGH propagation delay 2
HIGH-to-LOW propagation delay
LOW to HIGH output transition time
HIGH to LOW output transition time
setup time
hold time
[1]
73
122
61
24
-
-
183
-
40
-
-
ns
ns
ns
ns
ns
[1][2]
-
[1]
15
100
100
port B to port A
port B to port A
port A
port A
port A to port B
port A to port B; measured from
the 50 % of initial LOW on port A to
1.5 V rising on port B
port A to port B
port B
port B
EN HIGH before START condition
EN HIGH after STOP condition
[1]
69
105
86
27
8
89
131
216
140
96
35
139
226
ns
ns
ns
ns
ns
ns
[1]
63
[1]
14
[1]
5
[1]
69
[1]
91
t
PHL
t
TLH
t
THL
t
su
t
h
HIGH-to-LOW propagation delay
LOW to HIGH output transition time
HIGH to LOW output transition time
setup time
hold time
[1]
73
99
65
31
-
-
183
-
40
-
-
ns
ns
ns
ns
ns
[1][2]
-
[1]
15
100
100
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PCA9509D 功能描述:接口-信號(hào)緩沖器、中繼器 I2C LV LVL TRANSLATR RoHS:否 制造商:Texas Instruments 工作電源電壓: 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VSSOP-8 封裝:Reel
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