參數資料
型號: LTC1344IG
廠商: LINEAR TECHNOLOGY CORP
元件分類: 通用總線功能
英文描述: Software-Selectable Cable Terminator
中文描述: 6-LINE 104 ohm OTHER TERMINATOR, PDSO24
封裝: 0.209 INCH, PLASTIC, SSOP-24
文件頁數: 4/12頁
文件大小: 252K
代理商: LTC1344IG
4
LTC1344
TEST CIRCUITS
PI
FU
CTIO
N
S
U
U
M0 (Pin 1):
TTL Level Mode Select Input. The data on M0
is latched when LATCH is high.
V
EE
(Pin 2):
Negative Supply Voltage Input. Can connect
directly to the LTC1343 V
EE
pin.
R1C (Pin 3):
Load 1 Center Tap.
R1B (Pin 4):
Load 1 Node B.
R1A (Pin 5):
Load 1 Node A.
R2A (Pin 6):
Load 2 Node A.
R2B (Pin 7):
Load 2 Node B.
R2C (Pin 8):
Load 2 Center Tap.
R3A (Pin 9):
Load 3 Node A.
R2B (Pin 10):
Load 2 Node B.
R3C (Pin 11):
Load 3 Center Tap.
GND (Pin 12):
Ground Connection for Load 1 to Load 3.
GND (Pin 13):
Ground Connection for Load 4 to Load 6.
V
CC
(Pin 14):
Positive Supply Input. 4.75V
V
CC
5.25V.
R4B (Pin 15):
Load 4 Node B.
R4A (Pin 16):
Load 4 Node A.
R5B (Pin 17):
Load 5 Node B.
R5A (Pin 18):
Load 5 Node A.
R6A (Pin 19):
Load 6 Node A.
R6B (Pin 20):
Load 6 Node B.
LATCH (Pin 21):
TTL Level Logic Signal Latch Input. When
it is low the input buffers on M0, M1, M2 and DCE/DTE are
transparent. When it is high the logic pins are latched into
their respective input buffers. The data latch allows the
select lines to be shared between multiple I/O ports.
DCE/DTE (Pin 22):
TTL Level Mode Select Input. The DCE
mode is selected when it is high and DTE mode when low.
The data on DCE/DTE is latched when LATCH is high.
M2 (Pin 23):
TTL Level Mode Select Input 1. The data on
M2 is latched when LATCH is high.
M1 (Pin 24):
TTL Level Mode Select Input 2. The data on
M1 is latched when LATCH is high.
R1
51.5
R2
51.5
±
7V OR
±
2V
1344 F01
R3
124
S2
OFF
S1
ON
C
V
A
B
R1
51.5
R2
51.5
±
2V
1344 F02
R3
124
S2
ON
S1
ON
C
V
A, B
Figure 1. Differential V.11 or V.35 Impedance Measurement
Figure 2. V.35 Common Mode Impedance Measurement
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