Datasheet

MAX6979
16-Port, 5.5V Constant-Current LED Driver with
LED Fault Detection and Watchdog
_______________________________________________________________________________________ 3
5V TIMING CHARACTERISTICS
( Typical Operating Circuit , V+ = 4.5V to 5.5V, T
A
= T
MIN
to T
MAX
, unless otherwise noted.) (Notes 1 and 2)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
CLK Clock Period t
CP
40 ns
CLK Pulse-Width High t
CH
19 ns
CLK Pulse-Width Low t
CL
19 ns
DIN Setup Time t
DS
4ns
DIN Hold Time t
DH
8ns
DOUT Propagation Delay t
DO
12 32 ns
DOUT Rise and Fall Time t
DR
, t
DF
C
DOUT
= 10pF, 20% to 80% 10 ns
LE Setup Time t
LS
10 ns
LE Rising to OUT Rising Delay t
LRR
(Note 2) 100 ns
LE Rising to OUT Falling Delay t
LRF
(Note 2) 300 ns
C LK Ri si ng to O U T Ri si ng D el ay t
CRR
(Note 2) 100 ns
C LK Ri si ng to O U T Fal l i ng D el ay t
CRF
(Note 2) 310 ns
OE Rising to OUT Rising Delay t
OEH
100 ns
OE Falling to OUT Falling Delay t
OEL
320 ns
LED Output OUT Turn-On Fall
Time
t
f
80% to 20%; pullup resistor = 65Ω 120 ns
LED Output OUT Turn-Off Rise
Time
t
r
20% to 80%; pullup resistor = 65Ω 120 ns