LTC1688/LTC1689
PIN FUNCTIONS
DI1 (Pin 1):
Driver 1 Input. Do not float.
DO1A (Pin 2):
Driver 1 Noninverting Output.
DO1B (Pin 3):
Driver 1 Inverting Output.
EN (Pin 4, LTC1688):
High True Enable Pin, enables all
four drivers. A low on Pin 4 and a high on Pin 12 will put
all driver outputs into a high impedance state. See
Function Tables for details. Do not float.
EN12 (Pin 4, LTC1689):
Enables Drivers 1 and 2. A low on
Pin 4 will put the outputs of drivers 1 and 2 into a high
impedance state. See Function Tables for details. Do not
float.
DO2B (Pin 5):
Driver 2 Inverting Output.
DO2A (Pin 6):
Driver 2 Noninverting Output.
DI2 (Pin 7):
Driver 2 Input. Do not float.
GND (Pin 8):
Ground Connection. A good ground plane is
recommended for all applications.
DI3 (Pin 9):
Driver 3 Input. Do not float.
DO3A (Pin 10):
Driver 3 Noninverting Output.
DO3B (Pin 11):
Driver 3 Inverting Output.
ENB (Pin 12, LTC1688):
Low True Enable Pin, enables all
four drivers. A low on Pin 4 and a high on Pin 12 will put
all driver outputs into a high impedance state. See
Function Tables for details. Do not float.
EN34 (Pin 12, LTC1689):
Enables Drivers 3 and 4. A low
on Pin 12 will put the outputs of drivers 3 and 4 into a high
impedance state. See Function Tables for details. Do not
float.
DO4B (Pin 13):
Driver 4 Inverting Output.
DO4A (Pin 14):
Driver 4 Noninverting Output.
DI4 (Pin 15):
Driver 4 Input. Do not float.
V
DD
(Pin 16):
Power Supply Input. This pin should be
bypassed with a 0.1µF ceramic capacitor as close to the
pin as possible. Recommended: V
DD
= 3V to 5.25V.
FU CTIO TABLES
LTC1688
INPUTS
DI
H
L
H
L
X
EN
H
H
X
X
L
ENB
X
X
L
L
H
OUTA
H
L
H
L
HI-Z
OUTPUTS
OUTB
L
H
L
H
HI-Z
DI
H
L
X
TEST CIRCUITS
EN (EN12)
A
R
V
OD
R
B
V
OC
1688/89 TC01
Figure 1. Driver DC Test Load
U
U
U
U
U
LTC1689
INPUTS
EN12/EN34
H
H
L
OUTA
H
L
HI-Z
OUTPUTS
OUTB
L
H
HI-Z
C
L1
A
DI
DRIVER
B
C
L2
1688/89 TC02
S1
V
DD
OUTPUT
UNDER TEST
500
Ω
R
DIFF
C
L
S2
ENB (EN34)
1688/89 TC03
Figure 2. Driver Timing Test Circuit
Figure 3. Driver Timing Test Load
16889fa
5
LINEAR_DIMENSIONS [ LINEAR DIMENSIONS SEMICONDUCTOR ]
