LTC487CN-PBF 데이터 시트보기 (PDF) - Linear Technology
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LTC487CN-PBF Datasheet PDF : 12 Pages
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LTC487
Pin Functions
DI1 (Pin 1): Driver 1 Input. If Driver 1 is enabled, then a
low on DI1 forces the driver outputs DO1A low and DO1B
high. A high on DI1 with the driver outputs enabled will
force DO1A high and DO1B low.
DO1A (Pin 2): Driver 1 Output.
DO1B (Pin 3): Driver 1 Output.
EN12 (Pin 4): Driver 1 and 2 Outputs Enabled. See Func-
tion Table for details.
DO2B (Pin 5): Driver 2 Output.
DO2A (Pin 6): Driver 2 Output.
DI2 (Pin 7): Driver 2 Input. Refer to DI1.
GND (Pin 8): GND Connection.
DI3 (Pin 9): Driver 3 Input. Refer to DI1.
DO3A (Pin 10): Driver 3 Output.
DO3B (Pin 11): Driver 3 Output.
EN34 (Pin 12): Driver 3 and 4 Outputs Enabled. See Func-
tion Table for details.
DO4B (Pin 13): Driver 4 Output.
DO4A (Pin 14): Driver 4 Output.
DI4 (Pin 15): Driver 4 Input. Refer to DI1.
VCC (Pin 16): Positive Supply; 4.75 < VCC < 5.25.
Function Table
INPUT
DI
H
L
X
ENABLES
EN12 or EN34
H
H
L
OUTPUTS
OUT A
OUT B
H
L
L
H
Z
Z
H: High Level
L: Low Level
X: Irrelevant
Z: High Impedance (Off)
Switching Time Waveforms
3V
DI
0V
B
VO
A
VO
–VO
1.5V
tPLH
f = 1MHz : tr < 10ns : tf < 10ns
1/2 VO
80%
10%
tr
tSKEW
VDIFF = V(A) – V(B)
Figure 1. Driver Propagation Delays
3V
EN12
0V
5V
A, B
VOL
VOH
A, B
0V
1.5V
t ZL
2.3V
f = 1MHz : tr ≤ 10ns : tf ≤ 10ns
OUTPUT NORMALLY LOW
2.3V
OUTPUT NORMALLY HIGH
tZH
Figure 2. Driver Enable and Disable Times
1.5V
tPHL
1/2 VO
tSKEW
90%
20%
tf
1.5V
t LZ
0.5V
0.5V
tHZ
LTC487 • TA05
LTC487 • TA06
487fc
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