Datasheet

LTC2757
4
2757f
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Power Supply
V
DD
Supply Voltage
l
2.7 5.5 V
I
DD
Supply Current, V
DD
Digital Inputs = 0V or V
DD
l
0.5 1 A
Digital Inputs
V
IH
Digital Input High Voltage 3.3V ≤ V
DD
≤ 5.5V
2.7V ≤ V
DD
< 3.3V
l
l
2.4
2
V
V
V
IL
Digital Input Low Voltage 4.5V < V
DD
≤ 5.5V
2.7V ≤ V
DD
≤ 4.5V
l
l
0.8
0.6
V
V
Hysteresis Voltage 0.1 V
I
IN
Digital Input Current V
IN
= GND to V
DD
l
±1 µA
C
IN
Digital Input Capacitance V
IN
= 0V (Note 12)
l
6pF
Digital Outputs
V
OH
I
OH
= 200µA
l
V
DD
– 0.4 V
V
OL
I
OL
= 200µA
l
0.4 V
TIMING CHARACTERISTICS
V
DD
= 5V, V(R
IN
) = 5V unless otherwise specifi ed. The l denotes specifi cations that
apply over the full operating temperature range, otherwise specifi cations are at T
A
= 25°C.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
DD
= 4.5V to 5.5V
Write and Update Timing
t
1
I/O Valid to WR Rising Edge Set-Up
l
9ns
t
2
I/O Valid to WR Rising Edge Hold
l
9ns
t
3
WR Pulse Width
l
20 ns
t
4
UPD Pulse Width
l
20 ns
t
5
UPD Falling Edge to WR Falling Edge No Data Shoot-Through
l
0ns
t
6
WR Rising Edge to UPD Rising Edge (Note 12)
l
0ns
t
7
D/S Valid to WR Falling Edge Set-Up Time
l
9ns
t
8
WR Rising Edge to D/S Valid Hold Time
l
9ns
Readback Timing
t
13
WR Rising Edge to READ Rising Edge
l
9ns
t
14
READ Falling Edge to WR Falling Edge (Note 12)
l
20 ns
t
15
READ Rising Edge to I/O Propagation Delay C
L
= 10pF
l
30 ns
t
17
UPD Valid to I/O Propagation Delay C
L
= 10pF
l
30 ns
t
18
D/S Valid to READ Rising Edge (Note 12)
l
9ns
t
19
READ Rising Edge to UPD Rising Edge No Update
l
9ns
t
20
UPD Falling Edge to READ Falling Edge No Update
l
9ns
t
22
READ Falling Edge to UPD Rising Edge (Note 12)
l
9ns
t
23
I/O Bus Hi-Z to READ Rising Edge (Note 12)
l
0ns
t
24
READ Falling Edge to I/O Bus Active (Note 12)
l
20 ns
ELECTRICAL CHARACTERISTICS
V
DD
= 5V, V(R
IN
) = 5V unless otherwise specifi ed. The l denotes the
specifi cations which apply over the full operating temperature range, otherwise specifi cations are at T
A
= 25°C.