NTE NTE7175

NTE7175
Integrated Circuit
Quad EIA−422 Line Driver
With Three−State Outputs
Description:
The NTE7175 is a Quad EIA−422 Driver in a 16−Lead DIP type package that features four independent driver chains which comply with EIA Standards for the Electrical Characteristics of Balanced
Voltage Digital Interface Circuits. The outputs are three−state structures which are forced to a high
impedence state when the appropriate output control pin reaches a logic zero condition. All input pins
are PNP buffered to minimize input loading for either logic one or logic zero inputs. In addition, internal
circuitry assures a high impedance output state during the transition between power up and power
down.
Features:
D Four Independent Driver Chains
D Three−State Outputs
D PNP High Impedence Inputs (PIA Compaitible)
D Fast Propagation Times (Typ 15ns)
D TTL Compaitible
D Single 5V Supply Voltage
D Output Rise and Fall Times Less Than 20ns
Absolute Maximum Ratings:
Power Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.0Vdc
Input Voltage, Vl . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.5Vdc
Operating Ambient Temperature Range, TA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0° to +70°C
Operating Junction Temperature Range, TJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +150°C
Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −65° to +150°C
Electrical Characteristics: (4.75V ≤ VCC ≤ 5.25V and 0°C ≤ TA ≤ 70°C. Typical Values Measured
at VCC = 5V, and TA = +25°C, unless otherwise specified)
Parameter
Symbol
Test Conditions
Min Typ
Max
Unit
0.8
Vdc
VIL
Low Logic State
−
−
VIH
High Logic State
2.0
−
Input Current − Low Logic State
VIL
VIL = 0.5V
−
−
−400
µA
Input Current − High Logic State
IIL
VIH = 2.7V
−
−
+50
µA
VIH = 5.5V
−
−
+100
µA
Input Voltage
Vdc
Electrical Characteristics (Cont’d): (4.75V ≤ VCC ≤ 5.25V and 0°C ≤ TA ≤ 70°C Typical Values
Measured at VCC = 5V, and TA = +25°C, unless otherwise
specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
Input Clamp Voltage
VIK
IIk = −18mA
−
−
−1.5
V
Output Voltage
VOL
IOL = 48mA
−
−
0.5
V
Output Short−Circuit Current
IOS
VIH = 2.0V, Note 1
−40
−
−140
mA
VIL = 0.5V, VIL(Z) = 0.8V
−
−
±100
µA
VIH = 2.7V, VIL(Z) = 0.8V
−
−
±100
µA
VOH = 6.0V, VCC = 0V
−
−
+100
µA
VOL = −0.25V, VCC = 0V
−
−
−100
µA
−
−
±0.4
V
Output Leakage Current − Hi−Z State
Output Leakage Current − Power OFF
Output Offset Voltage Difference
Output Differential Voltage
Output Differential Voltage Difference
Power Supply Current
IOL(Z)
IOL(off)
VOS − VOS Note 2
VOD
Note 2
2.0
−
−
V
|∆VOD|
Note 2
−
−
±0.4
V
ICCX
Control Pins = GND, Note 3
−
−
105
mA
ICC
Control Pins = 2.0V
−
−
85
mA
Switching Characteristics (VCC = 5V, TA = +25°C, unless otherwise specified)
Propagation Delay Times
Output Transition Times Differential
Propagation Delay − Control to Output
tPHL
High to Low Output
−
−
20
ns
tPLH
Low to High Output
−
−
20
ns
tTHL
High to Low Output
−
−
20
ns
tTLH
Low to High Output
−
−
20
ns
tPHZ(E)
RL = 200Ω, CL = 50pF
−
−
25
ns
tPLZ(E)
RL = 200Ω, CL = 50pF
−
−
25
ns
tPZH(E)
RL = ∞, CL = 50pF
−
−
30
ns
tPZL(E)
RL = 200Ω, = 50pF
−
−
30
ns
Note 1 Only one output may be stored at a time
Note 2 See EIA Specification EIA−422 for exact test conditions
Note 3 Circuit in three−state condition
Truth Table:
L
H
X
Z
=
=
=
=
Input
Control
Input
Non−Inverting
Output
Inverting
Output
H
H
H
L
L
H
L
H
X
L
Z
Z
Low Logic State
High Logic State
Irrelevant
Third−State (High Impedance)
Pin Connection Diagram
Input A
1
16 VCC
Output A
2
15 Input D
Output A
3
14 Output D
A/B Control
4
13 Output D
Output B
5
12 C/D Control
Output B
6
11 Output C
Input B
7
10 Output C
GND
8
9
16
9
1
8
.785 (19.93) Max
Input C
.267 (6.79)
.200
(5.08)
.100 (2.54)
.147 (3.7)
.300 (7.62)