NSC DS34C86T Quad cmos differential line receiver Datasheet

DS34C86T
Quad CMOS Differential Line Receiver
General Description
Features
The DS34C86T is a quad differential line receiver designed
to meet the RS-422, RS-423, and Federal Standards 1020
and 1030 for balanced and unbalanced digital data transmission, while retaining the low power characteristics of CMOS.
The DS34C86T has an input sensitivity of 200 mV over the
common mode input voltage range of ± 7V. Hysteresis is provided to improve noise margin and discourage output instability for slowly changing input waveforms.
The DS34C86T features internal pull-up and pull-down resistors which prevent output oscillation on unused channels.
Separate enable pins allow independent control of receiver
pairs. The TRI-STATE ® outputs have 6 mA source and sink
capability. The DS34C86T is pin compatible with the
DS3486.
n CMOS design for low power
n ± 0.2V sensitivity over the input common mode voltage
range
n Typical propagation delays: 19 ns
n Typical input hysteresis: 60 mV
n Inputs won’t load line when VCC = 0V
n Meets the requirements of EIA standard RS-422
n TRI-STATE outputs for system bus compatibility
n Available in surface mount
n Open input Failsafe feature, output high for open input
Logic Diagram
DS008699-1
Connection Diagram
Truth Table
Dual-In-Line Package
Enable
Input
L
X
Output
Z
H
VID ≥ VTH (Max)
H
H
VID ≤ VTH (Min)
L
H
Open*
H
*Open, not terminated
Z = TRI-STATE
DS008699-2
Top View
Order Number DS34C86TM, and DS34C86TN
See NS Package Number M16A and N16E
TRI-STATE ® is a registered trademark of National Semiconductor Corporation.
© 1998 National Semiconductor Corporation
DS008699
www.national.com
DS34C86T Quad CMOS Differential Line Receiver
May 1998
Absolute Maximum Ratings (Notes 1, 2)
Maximum Power Dissipation at 25˚C (Note 5)
Plastic “N” Package
1645 mW
SOIC Package
1190 mW
± 25 mA
Current Per Output
This device does not meet 2000V ESD rating. (Note 4)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Supply Voltage (VCC)
Input Common Mode Range (V
CM)
Differential Input Voltage (V DIFF)
Enable Input Voltage (V IN)
Storage Temperature Range (T
STG)
Lead Temperature (Soldering 4
sec)
7V
Operating Conditions
± 14V
± 14V
7V
−65˚C to +150˚C
DC Electrical Characteristics
Min
4.50
−40
Supply Voltage (VCC)
Operating Temperature Range (TA)
Enable Input Rise or Fall Times
Max
5.50
+85
500
Unit
V
˚C
ns
260˚C
(Note 3)
VCC = 5V ± 10% (unless otherwise specified)
Symbol
VTH
Parameter
Minimum Differential
Input Voltage
RIN
IIN
Input Resistance
Input Current
(Under Test)
VOH
Minimum High Level
Output Voltage
VOL
Maximum Low Level
Output Voltage
VIH
Conditions
VOUT = V OH or VOL
−7V < VCM < +7V
VIN = −7V, +7V
(Other Input = GND)
VIN = +10V, Other Input =
GND
VIN = −10V, Other Input =
GND
VCC = Min., V(DIFF) = +1V
Min
Typ
Max
Units
−200
35
+200
mV
5.0
6.8
10
kΩ
+1.1
+1.5
mA
−2.0
−2.5
mA
3.8
4.2
IOUT = −6.0 mA
VCC = Max., V(DIFF) = −1V
IOUT = 6.0 mA
Minimum Enable High
V
0.2
0.3
2.0
V
V
Input Level Voltage
VIL
Maximum Enable Low
0.8
V
± 5.0
± 1.0
µA
23
mA
Input Level Voltage
IOZ
Maximum TRI-STATE
Output Leakage Current
II
Maximum Enable Input
VOUT = V CC or GND,
TRI-STATE Control = VIL
VIN = V CC or GND
± 0.5
µA
Current
ICC
Quiescent Power
VCC = Max., V(DIFF) = +1V
16
VCM = 0V
60
Supply Current
VHYST
Input Hysteresis
mV
AC Electrical Characteristics
(Note 3)
VCC = 5V ± 10% (unless otherwise specified) (Figures 1, 2, 3)
Symbol
tPLH,
Propagation Delay
tPHL
Input to Output
Conditions
CL = 50 pF
VDIFF = 2.5V
tRISE,
Output Rise and
VCM = 0V
CL = 50 pF
tFALL
Fall Times
VDIFF = 2.5V
tPLZ,
Propagation Delay
VCM = 0V
CL = 50 pF
tPHZ
ENABLE to Output
www.national.com
Parameter
RL = 1000Ω
VDIFF = 2.5V
2
Min
Typ
Max
Units
19
30
ns
4
9
ns
13
18
ns
AC Electrical Characteristics
(Note 3) (Continued)
VCC = 5V ± 10% (unless otherwise specified) (Figures 1, 2, 3)
Symbol
Parameter
tPZL,
Propagation Delay
tPZH
ENABLE to Output
Conditions
CL = 50 pF
RL = 1000Ω
Min
Typ
Max
Units
13
21
ns
VDIFF = 2.5V
Note 1: Absolute Maximum Ratings are those values beyond which the safety of the device cannot be guaranteed. They are not meant to imply that the device
should be operated at these limits. The table of “Electrical Characteristics” provides conditions for actual device operation.
Note 2: Unless otherwise specified, all voltages are referenced to ground.
Note 3: Unless otherwise specified, Min/Max limits apply across the operating temperature range.
All typicals are given for VCC = 5V and TA = 25˚C.
Note 4: ESD Rating; HBM (1.5kΩ, 100 pF)
Inputs ≥ 2000V
All other pins ≥ 1000V
EIAJ (0Ω, 200 pF) ≥ 350V
Note 5: Ratings apply to ambient temperature at 25˚C. Above this temperature derate N Package 13.16 mW/˚C, and M Package 9.52 mW/˚C.
Comparison Table of Switching Characteristics into “LS-Type” Load
(Note 6)
VCC = 5V, TA = 25˚C (Figures 4, 5)
Symbol
Parameter
DS34C86
Typ
tPHL(D)
Propagation Delay Time
DS3486
Max
Typ
Units
Max
17
19
ns
19
19
ns
Output High to Low
tPLH(D)
Propagation Delay Time
Output Low to High
tPLZ
Output Low to TRI-STATE
13
23
ns
tPHZ
Output High to TRI-STATE
12
25
ns
tPZH
Output TRI-STATE to High
13
18
ns
tPZL
Output TRI-STATE to Low
13
20
ns
Note 6: This Table is provided for comparison purposes only. The values in this table for the DS34C86 reflect the performance of the device but are not tested or
guaranteed.
Test and Switching Waveforms
DS008699-3
FIGURE 1. Propagation Delays
3
www.national.com
Test and Switching Waveforms
(Continued)
DS008699-4
CL Includes load and test jig capacitance.
S1 = VCC for tPZL, and tPLZ measurements.
S1 = GND for tPZH, and t PHZ measurements.
FIGURE 2. Test Circuit for TRI-STATE Output Tests
DS008699-5
FIGURE 3. TRI-STATE Output Enable and Disable Waveforms
AC Test Circuits and Switching Time Waveforms
DS008699-6
DS008699-7
Input Pulse Characteristics:
tTLH = tTHL = 6 ns (10% to 90%)
PRR = 1 MHz, 50% duty cycle
FIGURE 4. Propagation Delay Differential Input to Output for “LS-Type” Load
www.national.com
4
AC Test Circuits and Switching Time Waveforms
(Continued)
DS008699-8
1.5V for tPHZ and tPLZ
−1.5V for tPLZ and tPZL
Input Pulse Characteristics:
tTLH = tTHL = 6 ns (10% to 90%)
PRR = 1 MHz, 50% duty cycle
tPLZ
tPHZ
DS008699-10
DS008699-9
tPZL
tPZH
DS008699-11
DS008699-12
FIGURE 5. Propagation Delay TRI-STATE Control Unit to Output for “LS-Type” Load
5
www.national.com
6
Physical Dimensions
inches (millimeters) unless otherwise noted
16-Lead Molded Small Outline Package (M)
Order Number DS34C86TM
NS Package Number M16A
16-Lead Dual-In-Line Package (N)
Order Number DS34C86TN
NS Package Number N16E
7
www.national.com
DS34C86T Quad CMOS Differential Line Receiver
LIFE SUPPORT POLICY
NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein:
2. A critical component in any component of a life support
1. Life support devices or systems are devices or sysdevice or system whose failure to perform can be reatems which, (a) are intended for surgical implant into
sonably expected to cause the failure of the life support
the body, or (b) support or sustain life, and whose faildevice or system, or to affect its safety or effectiveness.
ure to perform when properly used in accordance
with instructions for use provided in the labeling, can
be reasonably expected to result in a significant injury
to the user.
National Semiconductor
Corporation
Americas
Tel: 1-800-272-9959
Fax: 1-800-737-7018
Email: [email protected]
www.national.com
National Semiconductor
Europe
Fax: +49 (0) 1 80-530 85 86
Email: [email protected]
Deutsch Tel: +49 (0) 1 80-530 85 85
English Tel: +49 (0) 1 80-532 78 32
Français Tel: +49 (0) 1 80-532 93 58
Italiano Tel: +49 (0) 1 80-534 16 80
National Semiconductor
Asia Pacific Customer
Response Group
Tel: 65-2544466
Fax: 65-2504466
Email: [email protected]
National Semiconductor
Japan Ltd.
Tel: 81-3-5620-6175
Fax: 81-3-5620-6179
National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications.
Similar pages