cat4008 Catalyst Semiconductor, cat4008 Datasheet - Page 4

• Manufacturer Part Number: cat4008
• Description: 8-channel Constant Current Led Driver
• Manufacturer: Catalyst Semiconductor

CAT4008
TIMING CHARACTERISTICS
For 3.0V ≤ V
TEST CIRCUIT FOR AC CHARACTERISTICS
Notes:
(1) All min and max values are guaranteed by design.
(2) V
Doc. No. MD-5034 Rev. A
Symbol
CLK
SIN
LATCH
LEDn
SOUT
T
t
t
t
t
f
T
t
t
t
cwh
t
t
t
ssu
lwh
t
t
cwl
t
t
clk
bd
od
sh
lst
DD
lsu
ld
or
of
ls
lr
lf
lh
= 5V, LED current 30mA.
Name
CLK Clock Frequency
CLK Pulse Width High
CLK Pulse Width Low
Setup time SIN to CLK
Hold time SIN to CLK
LATCH Pulse width
Hold time LATCH to CLK
Setup time LATCH to CLK
LED1 Propagation delay
LED Propagation delay stagger
LED Propagation delay stagger
total
BLANK Propagation delay
LED rise time (10% to 90%)
LED fall time (90% to 10%)
SOUT rise time (10% to 90%)
SOUT fall time (90% to 10%)
Propagation delay time SOUT
DD
≤ 5.5V, T
VDD
AMB
= 25 ºC, unless specified otherwise.
BLANK
LATCH
SIN
CLK
1µF
RSET
RSET
VDD
Conditions
LATCH to LED1 off/on
LED(n) to LED(n+1)
LED1 to LED8
BLANK to LED(n) off/on
Pull-up resistor = 50Ω to 3.0V
Pull-up resistor = 50Ω to 3.0V
C
C
CLK to SOUT
Channel Stagger Delay
L
L
= 15pF
= 15pF
CAT4008
GND
4
SOUT
LED1
LED8
Rp
Rp
Cl
15pF
Min
400
20
20
20
4
4
4
8
50Ω
50Ω
(1)
Characteristics subject to change without notice
Typ
V1
3V
120
40
17
60
40
30
15
5
5
(2)
© Catalyst Semiconductor, Inc.
Max
300
300
200
250
40
25
25
(1)
Units
MHz
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns