SN65LBC184, SN75LBC184
DIFFERENTIAL TRANSCEIVER
WITH TRANSIENT VOLTAGE SUPPRESSION
SLLS236A – OCTOBER 1996 – REVISED MAY 1998
DRIVER SECTION
electrical characteristics over recommended operating conditions (unless otherwise noted)
PARAMETER
ALTERNATE
SYMBOLS
TEST CONDITIONS
DE = RE = 5 V,
,
No Load
ICC
Supply current
NA
DE = 0 V,
RE = 5 V
V,
No Load
VI = 2.4 V
VI = 0.4 V
VO = –7 V
NA
VO = VCC
VO = 12 V
IOZ
VO
VOC(PP)
VOC
|∆VOC(SS)|
High-impedance output current
Output voltage
Peak-to-peak change in common-
mode output voltage during state
transitions
Common-mode output voltage
Magnitude of change, common-
mode steady-state output voltage
Magnitude of diff
M
it d f differential output
ti l t t
voltage |VA – VB| (see Note 4)
Change in differential voltage mag-
nitude between logic states
NA
Voa, Vob
NA
|Vos|
|Vos – Vos|
IO= 0‡
See Figures 5 and 6
See Figure 4
See Figure 5
IO = 0
Vo
RL = 54
Ω,
,
See Figure 4
RL = 54
Ω
TA
≥
0°C
TA < 0°C
1.5
1.5
1
0.2
1
See Receiver II
0
0.8
3
0.2
6
6
–120
SN75LBC184
SN65LBC184
SN75LBC184
SN65LBC184
MIN
TYP†
12
12
175
175
MAX
25
30
300
300
±100
±100
– 250
250
250
mA
V
V
V
V
V
V
V
V
mA
µA
µA
UNIT
mA
µA
IIH
IIL
IOS
High-level input current (D, DE, RE)
Low-level input current (D, DE, RE)
Short-circuit
Short circuit output current
(see Note 5)
NA
NA
|VOD|
∆|V
OD|
||Vt| – |Vt||
† All typical values are measured with TA = 25°C and VCC = 5 V.
‡ IO = Iia, Iib. Iia and Iib are alternate symbols for input voltage.
NOTES: 4. The minimum VOD specification of the SN75LBC184 and the SN65LBC184 may not fully comply with ANSI RS-485 at operating
temperature below 0°C. System designers should take the possibly lower output signal into account in determining the maximum
signal-transmission distance.
5. This parameter is measured with only one output being driven at a time.
4
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•
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