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PI6ULS5V9509
Level Translating I
2
C-Bus/SMBus Repeater with Tiny Package
Features
Bidirectional buffer isolates capacitance and allows
400 pF on port B of the device
Port A operating supply voltage range of 1.1 V to
V
CC(B)
- 1.0V
Port B operating supply voltage range of 2.5 V to
5.5 V
Voltage level translation from 1.1V to V
CC(B)
-
1.0V and from 2.5 V to 5.5 V
Requires no external pull-up resistors on lower
voltage port A
Open-drain port B inputs/outputs
Lock-up free operation
Supports arbitration and clock stretching across the
repeater
Accommodates Standard-mode and Fast-mode I
2
C-
bus devices and multiple masters
Powered-off high-impedance I
2
C-bus pins
5 V tolerant B SCL, SDA and enable pins
0 Hz to 400 kHz clock frequency (Remark: The
maximum system operating frequency may be less
than 400 kHz because of the delays added by the
repeater.)
ESD protection exceeds 8KV HBM per JESD22-
A114
Package: MSOP-8, SOIC-8 and
UQFN1.6x1.6-8L
Description
T
he PI6ULS5V9509 is a level translating I C-
2
Pin Configuration
SOIC-8 and MSOP-8
bus/SMBus repeater.
It can provide bidirectional level
translation between low voltage (down to 1.1V) and
higher voltage (2.5V to 5.5V) in mixed-mode
applications. And it enables I
2
C and similar bus system
to be extended, without degradation of performance
even during level shifting.
The PI6ULS5V9509 enables the system designer to
isolate two halves of a bus for both voltage and
capacitance, accommodating more I
2
C devices or longer
trace length. It also permits extension of the I
2
C-bus by
providing bidirectional
buffering
for both the data (SDA)
and the clock (SCL) lines, thus allowing two buses of
400 pF to be connected in an I
2
C application.
The bus port B drivers are compliant with SMBus
I/O levels, while port A uses a current sensing
mechanism to detect the input or output LOW signal
which prevents bus lock-up. Port A uses a 1 mA current
source for pull-up and a 200Ω pull-down driver. This
result in a LOW on the port A accommodating smaller
voltage swings. The output pull-down on the port A
internal buffer LOW is set for approximately 0.2V,
while the input threshold of the internal buffer is set
about 50 mV lower than that of the output voltage LOW.
When the port A I/O is driven LOW internally, the LOW
is not recognized as a LOW by the input. This prevents a
lock-up condition from occurring. The output pull-down
on the port B drives a hard LOW and the input level is
set at 0.3 of SMBus or I
2
C-bus voltage level which
enables port B to connect to any other I
2
C-bus devices or
buffer.
The PI6ULS5V9509 drivers are not enabled unless
V
CC(A)
is above 0.8 V and V
CC(B)
is above 2.5 V. The
enable (EN) pin can also be used to turn the drivers on
and off under system control. Caution should be
observed to only change the state of the EN pin when the
bus is idle.
Pin Description
Pin No
1
2
3
4
5
6
7
8
Pin Name
V
CC(A)
A1
A2
GND
EN
B2
B1
V
CC(B)
Description
port A supply voltage
port A (lower voltage side)
port A (lower voltage side)
supply ground (0 V)
active HIGH repeater enable input
port B (SMBus/I
2
C-bus side)
port B (SMBus/I
2
C-bus side)
port B supply voltage
UQFN1.6x1.6-8L(Top View)
2015-04-0005
1
PT0460-3
04/20/15
PI6ULS5V9509
Level Translating I
2
C-Bus/SMBus
Repeater with Tiny Package
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Block Diagram
EN
H
L
Function
A1 = B1;
A2= B2;
disabled
Figure 1: Block Diagram
Maximum Ratings
Storage Temperature ................................................................................... -55oC to +125oC
Supply Voltage port B......................................................................................-0.5V to +6.0V
Supply Voltage port A ......................................................................................-0.5V to+6.0V
DC Input Voltage .............................................................................................-0.5V to +6.0V
Control Input Votage(EN) ...............................................................................-0.5V to+6.0V
Total Power Dissipation................................................................... 100mA
Input/Output Current (portA&B) ......................................................... 20mA
Input Current (EN, V
CC(A)
, V
CC(B)
, GND) ............................................... 20mA
ESD: HBM Mode...........................................................................................................8000V
Note:
Stresses greater than those listed under MAXIMUM
RATINGS may cause permanent damage to the
device. This is a stress rating only and functional
operation of the device at these or any other condi-
tions above those indicated in the operational sec-
tions of this specification is not implied. Exposure
to absolute maximum rating conditions for extended
periods may affect reliability.
Recommended operation conditions
Symbol
Vcc
(B)
Vcc
(A)
I
CC(A)
I
CC(B)
Parameter
supply voltage port B
supply voltage port A
GND = 0 V; T
amb
= -40
C
to +85
C;
unless otherwise specified
Test Conditions
-
-
all port A static HIGH
Min
2.5
1.1
0.25
1.25
0.5
Typ
[1]
-
-
0.45
3.0
0.9
Max
5.5
V
CC(B)
-1.0
0.9
Unit
V
V
mA
supply current on pin V
CC(A)
all port A static LOW
5
1.1
mA
supply current on pin V
CC(B)
all port B static HIGH
Note:
[1] Typical values with V
CC(A)
= 1.1 V, V
CC(B)
= 5 V.
2015-04-0005
2
PT0460-3
04/20/15
PI6ULS5V9509
Level Translating I
2
C-Bus/SMBus
Repeater with Tiny Package
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GND = 0 V; T
amb
= -40
C
to +85
C;
unless otherwise specified
DC Electrical Characteristics
Parameter
Description
Input and output of port A (A1&A2)
V
IH
HIGH-level input voltage
V
IL
[2]
V
ILc
V
IK
I
LI
I
IL
V
OL
LOW-level input voltage
contention LOW-level input
voltage
input clamping voltage
input leakage current
LOW-level input current
LOW-level output voltage
difference between LOW-level
output and LOW-level input
voltage contention
HIGH-level output leakage
current
input/output capacitance
Test Conditions
-
-
-
I
L
= -18 mA
V
I
= V
CC(A)
SDA, SCL; V
I
= 0.2 V
V
CC(A)
= 0.95 V to 1.2V
V
CC(A)
= > 1.2V to
(V
CC(B)
− 1 V)
guaranteed by design
V
O
= V
CC(A)
-
Min
0.7V
CC(A)
-0.5
−0.5
-1.5
-
-1.5
-
-
-
-
-
Typ
[1]
-
-
+0.15
-
-
-1.0
0.18
0.2
50
-
6
Max
V
CC(A)
+0.3
-
-0.5
±
1
-0.45
0.25
0.3
-
10
-
Unit
V
V
V
μA
mA
V
V
OL
-V
ILc
I
LOH
C
io
mV
μA
pF
Input and output of port B (B1&B2)
V
IH
V
IL
V
IK
I
LI
I
IL
V
OL
I
LOH
C
io
Enable
V
IH
V
IL
I
IL
I
LI
C
i
HIGH-level input voltage
LOW-level input voltage
LOW-level input current
input leakage current
input capacitance
-
-
V
I
= 0.2 V, EN;
V
CC
= 3.6 V
V
I
= V
CC
V
I
= 3.0 V or 0V
0.9V
CC(A)
-0.5
-1
-1
-
-
-
-
-
2
V
CC(B)
+0.1
V
CC(A)
+1
+1
-
V
V
μA
μA
pF
HIGH-level input voltage
LOW-level input voltage
input clamping voltage
input leakage current
LOW-level input current
LOW-level output voltage
HIGH-level output leakage
current
input/output capacitance
-
-
I
I
= -18 mA
V
I
= 3.6 V
V
I
= 0.2 V
I
OL
= 6 mA
V
O
= 3.6 V
-
0.7V
CC(B)
-0.5
-1.5
-1
-
-
-
-
-
-
-
-
-
0.1
-
3
V
CC(B)
+0.3
V
CC(B)
-0.5
1
10
0.2
10
-
V
V
μA
μA
V
μA
pF
Note:
1. Typical values with V
CC(A)
= 1.1 V, V
CC(B)
= 5 V.
2. V
IL
specification is for the falling edge seen by the port A input. V
ILC
is for the static LOW levels seen by the port A input
resulting in port B output staying LOW.
2015-04-0005
3
PT0460-3
04/20/15
PI6ULS5V9509
Level Translating I
2
C-Bus/SMBus
Repeater with Tiny Package
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Dynamic characteristics
V
CC(A)
= 1.1 V; V
CC(B)
= 3.3 V
[1]
Symbol
t
PLH
t
PHL
t
TLH
t
THL
t
PLH
t
PLH
2
t
PHL
t
TLH
[2]
Parameter
LOW-to-HIGH propagation delay
HIGH-to-LOW propagation delay
LOW to HIGH output transition
time
HIGH to LOW output transition
time
LOW to HIGH propagation delay
LOW to HIGH propagation delay
HIGH to LOW propagation delay
LOW to HIGH output transition
time
HIGH to LOW output transition
time
set-up time
hold time
[1]
Test Conditions
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
Min
-
-
14
-
-
-
20
-
1
100
100
Typ
65
25
22
20
-69
100
50
61
2
-
-
Max
216
140
96
-
-139
226
183
-
40
-
-
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
t
THL
t
su
t
h
V
CC(A)
= 1.9 V; V
CC(B)
= 5.0 V
Symbol
t
PLH
t
PHL
t
TLH
t
THL
t
PLH
t
PLH2
t
PHL
t
TLH
[2]
Parameter
LOW-to-HIGH propagation delay
HIGH-to-LOW propagation delay
LOW to HIGH output transition
time
HIGH to LOW output transition
time
LOW to HIGH propagation delay
LOW to HIGH propagation delay
HIGH to LOW propagation delay
LOW to HIGH output transition
time
HIGH to LOW output transition
time
set-up time
hold time
Test Conditions
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
Min
-
-
14
-
-
-
20
-
1
100
100
Typ
75
20
27
20
-69
91
50
65
2
-
-
Max
216
140
96
-
-139
226
183
-
40
-
-
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
t
THL
t
su
t
h
Note:
[1] Load capacitance = 50 pF; load resistance on port B = 1.35 k
[2] Value is determined by RC time constant of bus line
Figure 2: Propagation Delay and Transition Times BA
Figure 3: Propagation Delay and Transition Times AB
2015-04-0005
4
PT0460-3
04/20/15
PI6ULS5V9509
Level Translating I
2
C-Bus/SMBus
Repeater with Tiny Package
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Figure 4: Propagation delay from the port A’s external driver switching off to port B LOW-to-HIGH transition; (AB)
Figure 5: Test Circuit
2015-04-0005
5
PT0460-3
04/20/15
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