LB180 Просмотр технического описания (PDF) - Unspecified
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LB180 Datasheet PDF : 24 Pages
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SN55LBC180
SN65LBC180
SN75LBC180
SLLS174G – FEBRUARY 1994 – REVISED APRIL 2009................................................................................................................................................... www.ti.com
DRIVER SECTION
ELECTRICAL CHARACTERISTICS
over recommended operating conditions (unless otherwise noted)
PARAMETER
VIK
Input clamp voltage
| VOD | Differential output voltage magnitude(2)
Δ| VOD | Change in magnitude of differential output voltage(3)
VOC
Common-mode output voltage
Δ| VOC |
Change in magnitude of common-mode output
voltage (3)
IO
Output current with power off
IOZ
High-impedance-state output current
IIH
High-level input current
IIL
Low-level input current
IOS
Short-circuit output current
ICC
Supply current
TEST CONDITIONS
II = -18 mA
RL = 54 Ω,
See Figure 1
SN55LBC180
SN65LBC180
SN75LBC180
RL = 60 Ω,
See Figure 2
SN55LBC180
SN65LBC180
SN75LBC180
See Figure 1 and Figure 2
RL = 54 Ω,
See Figure 1
VCC = 0,
VO = –7 V to 12 V
VO = –7 V to 12 V
VI = 2.4 V
VI = 0.4 V
–7 V ≤ VO ≤ 12 V
Outputs enabled
Receiver disabled
Outputs disabled
MIN TYP(1)
1 2.5
1.1 2.5
1.5 2.5
1 2.5
1.1
2
1.5
2
1 2.5
MAX
–1.5
5
5
5
5
5
5
±0.2
3
UNIT
V
V
V
V
±0.2 V
±100 µA
±100 µA
100 µA
100 µA
±250 mA
5
mA
3
(1) All typical values are at VCC = 5 V and TA = 25°C.
(2) The minimum VOD specification may not fully comply with ANSI RS-485 at operating temperatures below 0°C. System designers should
take the possibly lower output signal into account in determining the maximum signal-transmission distance.
(3) Δ|VOD| and Δ|VOC| are the changes in the steady-state magnitude of VOD and VOC, respectively, that occur when the input is changed
from a high level to a low level.
SWITCHING CHARACTERISTICS
VCC = 5 V, TA = 25°C
PARAMETER
td(OD)
tt(OD)
tPZH
tPZL
tPHZ
tPLZ
Differential output delay time
Differential output transition time
Output enable time to high level
Output enable time to low level
Output disable time from high level
Output disable time from low level
TEST CONDITIONS
RL = 54 Ω,
RL = 110 Ω,
RL = 110 Ω,
RL = 110 Ω,
RL = 110 Ω,
See Figure 3
See Figure 4
See Figure 5
See Figure 4
See Figure 5
MIN TYP
7 12
5 10
MAX
18
20
35
35
50
35
UNIT
ns
ns
ns
ns
ns
ns
SWITCHING CHARACTERISTICS (SN55LBC180)
VCC = 5 V, TA = 25°C
PARAMETER
TEST CONDITIONS
td(OD)
tt(OD)
tPZH
tPHZ
tPZL
tPLZ
Differential output delay time
Differential output transition time
Output enable time to high level
Output disable time from high level
Output enable time to low level
Output disable time from low level
RL = 54 Ω,
See Figure 3
RL = 110 Ω, See Figure 4
RL = 110 Ω, See Figure 5
MIN TYP
15
21
32
55
32
20
MAX
UNIT
ns
ns
ns
ns
4
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Product Folder Link(s): SN55LBC180 SN65LBC180 SN75LBC180
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