MAX6954 Maxim, MAX6954 Datasheet - Page 4

• Manufacturer Part Number: MAX6954
• Description: 4-Wire Interfaced / 2.7V to 5.5V LED Display Driver with I/O Expander and Key Scan
• Manufacturer: Maxim

4-Wire Interfaced, 2.7V to 5.5V LED Display
Driver with I/O Expander and Key Scan
TIMING CHARACTERISTICS
(Typical Operating Circuit, V+ = 2.7V to 5.5V, T
(V+ = 3.3V, LED forward voltage = 2.4V, typical application circuit, T
4
Note 1: All parameters tested at T
TIMING CHARACTERISTICS
CLK Clock Period
CLK Pulse Width High
CLK Pulse Width Low
CS Fall to CLK Rise Setup Time
CLK Rise to CS Rise Hold Time
DIN Setup Time
DIN Hold Time
Output Data Propagation Delay
DOUT Output Rise and Fall Times
Minimum CS Pulse High
4.4
4.2
4.0
3.8
3.6
_______________________________________________________________________________________
-40
INTERNAL OSCILLATOR FREQUENCY
-10
PARAMETER
vs. TEMPERATURE
TEMPERATURE ( C)
20
50
R
C
SET
SET
80
= 56k
= 22pF
A
110
= +25°C. Specifications over temperature are guaranteed by design.
SYMBOL
t
t
t
t
CSW
t
CSH
t
t
t
CSS
t
t
DO
CH
DH
CP
CL
DS
FT
A
4.4
4.2
4.0
3.8
3.6
= T
2.5
MIN
V+ = 3.0V to 5.5V
V+ = 2.7V
C
INTERNAL OSCILLATOR FREQUENCY
R
C
LOAD
SET
SET
to T
3.0
= 56k
= 22pF
vs. SUPPLY VOLTAGE
MAX
= 10pF, V+ = 3.0V to 5.5V
SUPPLY VOLTAGE (V)
3.5
, unless otherwise noted.) (Note 1)
CONDITIONS
4.0
A
= +25°C, unless otherwise noted.)
Typical Operating Characteristics
4.5
5.0
5.5
OSC_OUT
OSC
0V
0V
MIN
38.4
19.5
9.5
9.5
16
16
R
C
0
0
INTERNAL OSCILLATOR WAVEFORM
SET
SET
= 56k
= 22pF
AT OSC AND OSC_OUT PINS
TYP
OSC_OUT: 2V/div
OSC: 500mV/div
100ns/div
MAX
19
25
10
MAX6954 toc03
UNITS
ns
ns
ns
ns
ns
ns
ns
ns
ns