LTC1327CN 查看數據表（PDF） - Linear Technology
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LTC1327CN Datasheet PDF : 8 Pages
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LTC1327
PI FU CTIO S
C1 +, C1 –, C2 +, C2 –: Commutating Capacitor Inputs.
These pins require two external capacitors C = 0.1µF. One
from C1+ to C1–, and another from C2 + to C2 –. To
maintain charge pump efficiency, the capacitor’s effective
series resistance should be less than 20Ω.
DR IN: EIA/TIA-562 Driver Input Pins. Inputs are TTL/
CMOS compatible. Inputs should not be allowed to float.
Tie unused inputs to VCC.
DR OUT: Driver Outputs at EIA/TIA-562 Voltage Levels.
Outputs are in a high impedance state when in SHUT-
DOWN mode or VCC = 0V. The driver outputs are protected
against ESD to ±10kV for human body model discharges.
RX IN: Receiver Inputs. These pins can be forced to ±25V
without damage. The receiver inputs are protected against
ESD to ±10kV for human body model discharges. Each
receiver provides 0.4V of hysteresis for noise immunity.
RX OUT: Receiver Outputs With TTL/CMOS Voltage Lev-
els. Outputs are in a high impedance state when in SHUT-
DOWN mode to allow data line sharing.
TEST CIRCUITS
ESD Test Circuit
C1
0.1µF
EIA/TIA 562
LINE PINS
PROTECTED
TO ±10kV
V+ 1
VCC 2
3
C2
0.1µF
4
5
DR1 OUT
RX1 IN 6
7
DR2 OUT
8
RX2 IN
9
RX3 IN
RX4 IN 10
11
DR3 OUT
12
RX5 IN
13
ON/OFF
NC 14
LTC1327
28 V–
27
26
C3
0.1µF
25
DR1 IN
24
RX1 OUT
23
DR2 IN
22 RX2 OUT
21
RX3 OUT
20
RX4 OUT
19 DR3 IN
18
RX5 OUT
17
GND
16
15
C4
0.1µF
LT1327 • TC01
Driver Timing Test Load
DRIVER
INPUT
DR
DRIVER
OUTPUT
51pF 3k
1327 TC02
Receiver Timing Test Load
RX IN
RX
RX
OUTPUT
51pF
1327 TC03
5
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