Datasheet

SN75976A, SN55976A
9-CHANNEL DIFFERENTIAL TRANSCEIVER
SLLS218B – MAY 1995 – REVISED MAY 1997
8
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
SN55976A SN75976A
UNIT
PARAMETER
TEST
CONDITIONS
MIN TYP
†
MAX MIN TYP
†
MAX
UNIT
S1 to A, V
T
= 5 V, See Figure 1 0.7 1 1.8 V
V
ODH
Driver differential high-
level out
p
ut voltage
S1 to B,
T
C
≥ 25°C
V
T
= 5 V,
See Figure 1
1 1.4 V
level
out ut
voltage
S1 to B,
See Figure 1
V
T
= 5 V,
0.7 0.8 V
D i diff ti l l
S1 to A,
T
C
≥ 25°C
V
T
= 5 V,
See Figure 1
0.7 –1.4 –1 –1.4 V
V
ODL
Driver differential low-
level out
p
ut voltage
S1 to B, V
T
= 5 V, See Figure 1 0.7 –1.8 –1 –1.8 V
level
out ut
voltage
S1 to A,
See Figure 1
V
T
= 5 V,
–0.8 –1.4 –0.8 –1.4 V
V
OH
High-level output volt-
age
A side,
I
OH
= –8 mA
V
ID
= 200 mV,
See Figure 3
4 4.5 4 4.5 V
OH
age
B side, V
T
= 5 V, See Figure 1 3 3 V
V
OL
Low-level output volt-
age
A side,
I
OH
= 8 mA
V
ID
= –200 mV,
See Figure 3
0.6 0.8 0.6 0.8 V
OL
age
A side, V
T
= 5 V, See Figure 1 1 1 V
V
IT+
Receiver positive-go-
ing differential input
threshold voltage
I
OH
= –8 mA, See Figure 3 0.2 0.2 V
V
IT–
Receiver negative-
going differential input
threshold voltage
I
OL
= 8 mA, See Figure 3 –0.2 –0.2 V
V
hys
Receiver input
hysteresis
(V
IT+
– V
IT–
)
V
CC
= 5 V, T
A
= 25°C 24 45 24 45 mV
V
IH
= 12 V, V
CC
= 5 V, Other input at 0 V 0.4 1 0.4 1 mA
I
I
Bus in
p
ut current
V
IH
= 12 V, V
CC
= 0, Other input at 0 V 0.5 1 0.5 1 mA
I
I
B
u
s
inp
u
t
c
u
rrent
V
IH
= –7 V, V
CC
= 5 V, Other input at 0 V –0.4 –0.8 –0.4 –0.8 mA
V
IH
= –7 V, V
CC
= 0, Other input at 0 V –0.3 –0.8 –0.3 –0.8 mA
I
IH
High-level input cur-
A, BSR, DE/RE, and CRE, V
IH
= 2 V –100 –100 µA
I
IH
g
rent
CDE0, CDE1, and CDE2,
V
IH
= 2V 100 100 µA
I
IL
Low level in
p
ut current
A, BSR, DE/RE, and CRE, V
IL
= 0.8 V –100 –100 µA
I
IL
Lo
w-
le
v
el
inp
u
t
c
u
rrent
CDE1, CDE1, and CDE2, V
IL
= 0.8 V 100 100 µA
I
OS
Short circuit output
current
nB+ or nB– ±260 ±260 mA
I
OZ
High-impedance-state
A See I
IH
and I
IL
See I
IH
and I
IL
I
OZ
g
output current
nB+ or nB–
See I
I
See I
I
Disabled 10 10 mA
I
CC
Supply current
All drivers enabled, no load
60 60 mA
All receivers enabled, no load 45 45 mA
C
O
Output capacitance nB+ or nB– to GND 18 18 25 pF
C
d
Power dissipation
ca
p
acitance
Receiver 40 40 pF
C
pd
capacitance
(see Note 4)
Driver 100 100 pF
†
All typical values are at V
CC
= 5 V, T
A
= 25°C.
NOTE 4: C
pd
determines the no-load dynamic supply current consumption, I
S
= C
PD
× V
CC
× f + I
CC