XRP6840 Exar Corporation, XRP6840 Datasheet - Page 4

• Manufacturer Part Number: XRP6840
• Description: 4.3a Supercapacitor Flash Led Driver With I2c
• Manufacturer: Exar Corporation

Default I
I
V
Note 1: All parameter tested at T
Note 2: Current into all LED pins is up to 400mA continuously in Torch 1.5x mode.
Note 3: LED current matching is calculated by this equation:
Note 4: Guaranteed by design.
Note 5: Cb = total capacitance of one bus line in pF. tR and tF measured between 0.3 x V
Note 6: I
Note 7: Input filters on the SDA and SCL inputs suppress noise spikes less than 50ns.
© 2009 Exar Corporation
Serial Clock Frequency
Bus Free Time between a STOP
and a START
Hold Time, Repeated START
Condition
STOP Condition Setup Time
Data Hold Time
Input Data Hold Time
Data Setup Time
SCL Clock Low Period
SCL Clock High Period
Rise Time of Both SDA and SCL
Signals, receiving
Fall Time of Both SDA and SCL
Signals, Receiving
Fall Time of SDA Transmitting
Pulse Width of Spike Suppressed
Capacitive Load for each Bus
Line
I
clears
2
IN
2
C Startup Time after UVLO
C T
= 3.3V, T
IMING
SINK
2
Parameter
C slave 7-bit address for XRP6840 is 0101000b
≤6mA. Cb =total capacitance of one bus line in pF. t
A
= –40°C to 85°C, T
C
100% where I
HARACTERISTICS
AVG
A
is the average current of all channels.
J
t
= 25°C. Specifications over temperature are guaranteed by design.
Symbol
t
HD,DAT(OUT)
= –40°C to 125°C. Unless otherwise noted.
HD,DAT(IN)
t
t
t
HD_STA
t
SU,STO
SU,DAT
t
t
t
t
f
HIGH
Cb
LOW
t
F.TX
SCL
BUF
t
SRT
t
SP
R
F
0.1Cb
0.1Cb
0.1Cb
20 +
20 +
20 +
Min.
4
4
225
100
1.3
0.6
0.6
1.3
0.6
0
0
.
.
3
3
A
A
S
S
Typ.
u
u
4/17
p
p
e
e
r
r
R
c
c
and t
a
a
Max.
400
900
900
300
300
250
400
p
p
50
1
a
a
F
measured between 0.3 x V
c
c
i
i
t
t
o
o
Units
KHz
r
r
ms
ms
ms
µs
µs
ns
ns
ns
ns
ns
ns
ns
pF
µs
F
F
l
l
a
a
s
s
Note 4,5
Note 4,5
Note 4,5,6
Note 7
Note 4
Note 4
h
h
DD
and 0.7 x V
L
L
E
E
D
D
D
D
Conditions
DD
r
r
and 0.7 V
i
i
DD
v
v
.
e
e
X
X
r
r
R
R
w
w
P
P
DD
Rev. 1.0.0
i
i
.
6
6
t
t
h
h
8
8
I
I
4
4
2
2
0
0
C
C