PCA9509 Просмотр технического описания (PDF) - Philips Electronics
Номер в каталоге
Компоненты Описание
производитель
PCA9509 Datasheet PDF : 16 Pages
| |||
Philips Semiconductors
PCA9509
Level translating I2C-bus/SMBus repeater
[3] The port A current source has a typical value of about 1 mA, but varies with both VCC(A) and VCC(B). Below VCC(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 Ω defines the VOL.
[4] As long as the chip ground is common with the input ground reference the driver resistance may be as large as 120 Ω. However, ground
offset will rapidly decrease the maximum allowed driver resistance.
[5] Guaranteed by design.
10. Dynamic characteristics
Table 5. Dynamic characteristics
Symbol Parameter
VCC(A) = 1.1 V; VCC(B) = 3.3 V
tPLH
LOW-to-HIGH propagation delay
tPHL
HIGH-to-LOW propagation delay
tTLH
LOW to HIGH output transition time
tTHL
HIGH to LOW output transition time
tPLH
LOW-to-HIGH propagation delay
tPLH2
LOW to HIGH propagation delay 2
tPHL
HIGH-to-LOW propagation delay
tTLH
LOW to HIGH output transition time
tTHL
HIGH to LOW output transition time
tsu
setup time
th
hold time
VCC(A) = 1.9 V; VCC(B) = 5.0 V
tPLH
LOW-to-HIGH propagation delay
tPHL
HIGH-to-LOW propagation delay
tTLH
LOW to HIGH output transition time
tTHL
HIGH to LOW output transition time
tPLH
LOW-to-HIGH propagation delay
tPLH2
LOW to HIGH propagation delay 2
tPHL
HIGH-to-LOW propagation delay
tTLH
LOW to HIGH output transition time
tTHL
HIGH to LOW output transition time
tsu
setup time
th
hold time
Conditions
Min Typ Max Unit
port B to port A
[1] 69
109 216 ns
port B to port A
[1] 63
86
140 ns
port A
[1] 14
22
96
ns
port A
[1] 5
8.1 16 ns
port A to port B
[1] −69 −91 −139 ns
port A to port B; measured from
the 50 % of initial LOW on port A to
1.5 V rising on port B
[1] 91
153 226 ns
port A to port B
[1] 73
122 183 ns
port B
[1][2] -
61 -
ns
port B
[1] 15
24
40
ns
EN HIGH before START condition
100 -
-
ns
EN HIGH after STOP condition
100 -
-
ns
port B to port A
[1] 69
105 216 ns
port B to port A
[1] 63
86
140 ns
port A
[1] 14
27
96
ns
port A
[1] 5
8
35 ns
port A to port B
[1] −69 −89 −139 ns
port A to port B; measured from
the 50 % of initial LOW on port A to
1.5 V rising on port B
[1] 91
131 226 ns
port A to port B
[1] 73
99
183 ns
port B
[1][2] -
65 -
ns
port B
[1] 15
31
40
ns
EN HIGH before START condition
100 -
-
ns
EN HIGH after STOP condition
100 -
-
ns
[1] Load capacitance = 50 pF; load resistance on port B = 1.35 kΩ.
[2] Value is determined by RC time constant of bus line.
PCA9509_1
Product data sheet
Rev. 01 — 27 June 2006
© Koninklijke Philips Electronics N.V. 2006. All rights reserved.
8 of 16
Share Link: 