DS8922MX [TI]
DUAL LINE TRANSCEIVER, PDSO16, 0.150 INCH, PLASTIC, SOP-16;
| 型号： | DS8922MX |
| 厂家： | 
TEXAS INSTRUMENTS |
| 描述： | DUAL LINE TRANSCEIVER, PDSO16, 0.150 INCH, PLASTIC, SOP-16 驱动 光电二极管 接口集成电路 驱动器 |
| 文件： | 总15页 (文件大小：575K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
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July 2004
DS8922/DS8922A/DS8923A TRI-STATE®
RS-422 Dual Differential Line Driver and Receiver Pairs
Power up/down circuitry is featured which will TRI-STATE
General Description
the outputs and prevent erroneous glitches on the transmis-
The DS8922/22A and DS8923A are Dual Differential Line
sion lines during system power up or power down operation.
Driver and Receiver pairs. These devices are designed spe-
The DS8922/22A and DS8923A are designed to be compat-
cifically for applications meeting the ST506, ST412 and
ible with TTL and CMOS.
ESDI Disk Drive Standards. In addition, the devices meet the
requirements of the EIA Standard RS-422.
Features
These devices offer an input sensitivity of 200 mV over a
n 12 ns typical propagation delay
n Output skew— 0.5 ns typical
n Meets the requirements of EIA Standard RS-422
n Complementary Driver Outputs
n High differential or common-mode input voltage ranges
of 7V
7V common mode operating range. Hysteresis is incorpo-
rated (typically 70 mV) to improve noise margin for slowly
changing input waveforms. An input fail-safe circuit is pro-
vided such that if the receiver inputs are open the output
assumes the logical one state.
The DS8922A and DS8923A drivers are designed to provide
unipolar differential drive to twisted pair or parallel wire trans-
mission lines. Complementary outputs are logically ANDed
and provide an output skew of 0.5 ns (typ.) with propagation
delays of 12 ns.
n
0.2V receiver sensitivity over the input voltage range
n Receiver input fail-safe circuitry
n Receiver input hysteresis—70 mV typical
n Glitch free power up/down
Both devices feature TRI-STATE outputs. The DS8922/22A
have independent control functions common to a driver and
receiver pair. The DS8923A has separate driver and receiver
control functions.
n TRI-STATE outputs
Connection Diagrams
DS8922A Dual-In-Line
00851101
Order Number DS8922M, DS8922N,
DS8922AM or DS8922AN
See NS Package Number M16A or N16E
TRI-STATE® is a registered trademark of National Semiconductor Corp.
© 2004 National Semiconductor Corporation
DS008511
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Connection Diagrams (Continued)
DS8923A Dual-In-Line
00851102
Order Number DS8923AM, DS8923AN,
See NS Package Number M16A or N16E
DS8922/22A
EN1
EN2
RO1
ACTIVE
HI-Z
RO2
ACTIVE
ACTIVE
HI-Z
DO1
ACTIVE
HI-Z
DO2
ACTIVE
ACTIVE
HI-Z
0
1
0
1
0
0
1
1
ACTIVE
HI-Z
ACTIVE
HI-Z
HI-Z
HI-Z
DS8923A
DEN
REN
RO1
ACTIVE
ACTIVE
HI-Z
RO2
ACTIVE
ACTIVE
HI-Z
DO1
ACTIVE
HI-Z
DO2
ACTIVE
HI-Z
0
1
0
1
0
0
1
1
ACTIVE
HI-Z
ACTIVE
HI-Z
HI-Z
HI-Z
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2
Absolute Maximum Ratings (Note 1)
Derate M Package 10.4 mW/˚C above +25˚C
Derate N Package 11.6 mW/˚C above +25˚C
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Storage Temperature Range
Lead Temp. (Soldering, 4 seconds)
ESD Rating (HBM)
−65˚C to +165˚C
260˚C
Supply Voltage
7V
−0.5V to +7V
5.5V
2000V+
Drive Input Voltage
Output Voltage
Recommended Operating
Conditions
Receiver Output Sink Current
Receiver Input Voltage
Differential Input Voltage
50 mA
10V
Min
4.5
0
Max
5.5
70
Units
V
12V
Supply Voltage
@
Maximum Package Power Dissipation +25˚C
Temperature (TA)
˚C
M Package
N Package
1300 mW
1450 mW
DS8922/22A and DS8923A Electrical Characteristics(Notes 2, 3, 4)
Symbol
RECEIVER
VTH
Conditions
Min
Typ
Max
Units
−7V ≤ VCM ≤ +7V
−7V ≤ VCM ≤ +7V
−200
15
35
70
+200
mV
mV
kΩ
mA
mA
V
VHYST
RIN
V
= −7V, +7V (Other Input = GND)
4.0
6.0
IN
IIN
VIN = 10V
3.25
VIN = −10V
−3.25
VOH
V
V
V
= MIN, IOH = − 400 µA
2.5
−15
2.5
CC
CC
CC
VOL
= MAX, IOL = 8 mA
= MAX, VOUT = 0V
0.5
V
ISC
−100
mA
DRIVER
VOH
V
V
V
= MIN, IOH = −20 mA
= MIN, IOL = +20 mA
= 0V, VOUT = 5.5V
V
V
CC
CC
CC
VOL
0.5
100
0.4
IOFF
µA
V
|VT|–| VT |
VT
2.0
V
|VOS– VOS
ISC
|
0.4
V
V
= MAX, VOUT = 0V
−30
−150
mA
CC
DRIVER and RECEIVER
IOZ
VOUT = 2.5V
VOUT = 0.4V
50
µA
µA
TRI-STATE
Leakage
ICC
VCC = MAX
VCC = MAX
−50
ACTIVE
76
78
mA
mA
TRI-STATE
DRIVER and ENABLE INPUTS
VIH
VIL
2.0
V
V
0.8
−200
20
IIL
V
V
V
V
= MAX, VIN = 0.4V
= MAX, VIN = 2.7V
= MAX, VIN = 7.0V
= MIN, IIN = −18 mA
−40
µA
µA
µA
V
CC
CC
CC
CC
IIH
II
100
−1.5
VCL
3
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Receiver Switching Characteristics
(Figures 1, 2, 3)
Parameter
Conditions
Min
Typ
Max
Units
8922
22.5
22.5
5
8922A/23A
TpLH
TpHL
CL = 30 pF
12
12
0.5
0.5
15
15
20
20
20
20
ns
ns
ns
ns
ns
ns
ns
ns
CL = 30 pF
|TpLH–T pHL
|
CL = 30 pF
3.5
2.0
Skew (Channel to Channel)
CL = 30 pF
3.0
TpLZ
TpHZ
TpZL
TpZH
CL = 15 pF S2 Open
CL = 15 pF S1 Open
CL = 30 pF S2 Open
CL = 30 pF S1 Open
Driver Switching Characteristics
Parameter
Conditions
Min
Typ
Max
Units
8922
8922A/23A
SINGLE ENDED CHARACTERISTICS (Figures 4, 5, 6, 8)
TpLH
CL = 30 pF
12
12
5
15
15
10
10
15
15
10
10
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
TpHL
CL = 30 pF
TTLH
CL = 30 pF
TTHL
CL = 30 pF
5
|TpLH–T pHL
|
CL = 30 pF
0.5
0.5
0.5
15
15
20
20
Skew
CL = 30 pF (Note 5)
5
3.5
2.0
Skew (Channel to Channel)
3.0
TpLZ
TpHZ
TpZL
TpZH
CL = 30 pF
CL = 30 pF
CL = 30 pF
CL = 30 pF
DIFFERENTIAL SWITCHING CHARACTERISTICS (Note 6), (Figure 4)
TpLH
CL = 30 pF
CL = 30 pF
CL = 30 pF
12
12
15
15
15
15
ns
ns
ns
TpHL
|TpLH–T pHL
|
0.5
6.0
2.75
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: All currents into device pins are shown as positive values; all currents out of the device are shown as negative; all voltages are referenced to ground unless
otherwise specified. All values shown as max or min are classified on absolute value basis.
Note 3: All typical values are V
= 5V, T = 25˚C.
A
CC
Note 4: Only one output at a time should be shorted.
Note 5: Difference between complementary outputs at the 50% point.
Note 6: Differential Delays are defined as calculated results from single ended rise and fall time measurements. This approach in establishing AC performance
specifications has been taken due to limitations of available Automatic Test Equipment (ATE).
The calculated ATE results assume a linear transition between measurement points and are a result of the following equations:
Where:
Tcp = Crossing Point
Tra, Trb, Tfa and Tfb are time measurements with respect to the input.
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4
Switching Time Waveforms
00851103
AC Test Circuits and Switching Waveforms
00851104
FIGURE 1.
00851105
FIGURE 2.
5
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AC Test Circuits and Switching Waveforms (Continued)
00851106
S1
TPLZ Closed Open
TPHZ Open
TPZL Closed Open
TPZH Open Closed −2.5V
FIGURE 3.
S2
S3
+2.5V
Closed −2.5V
+2.5V
00851107
FIGURE 4.
00851108
FIGURE 5.
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6
AC Test Circuits and Switching Waveforms (Continued)
00851109
FIGURE 6.
00851110
FIGURE 7.
00851113
FIGURE 8.
7
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Typical Performance Characteristics (DS8923A)
Driver VOH vs IOH
vs Temperature
Driver VOH vs IOH vs VCC
Driver VOL vs IOL vs VCC
Receiver VOH vs IOH vs VCC
00851114
00851115
00851117
00851119
Driver VOL vs IOL
vs Temperature
00851116
Receiver V
vs IOH
OH
vs Temperature
00851118
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8
Typical Performance Characteristics (DS8923A) (Continued)
Receiver V
vs IOL
OL
vs Temperature
Receiver VOL vs IOL vs VCC
00851120
00851121
Driver Differential Propagation
Delay vs Temperature
Driver Differential Propagation
Delay vs VCC
00851122
00851123
Receiver Propagation
Delay vs Temperature
Receiver Propagation
Delay vs VCC
00851124
00851125
9
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Typical Performance Characteristics (DS8923A) (Continued)
Driver VOD vs Temperature
Driver VOD vs VCC
00851126
00851127
Driver Differential Transition
Time vs Temperature
Driver VOD vs RL
00851128
00851129
Driver Differential Transition
Time vs VCC
Supply Current vs
Temperature
00851131
00851130
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10
Typical Performance Characteristics (DS8923A) (Continued)
Supply Current vs V
ICC vs Driver Switching Frequency
CC
00851132
00851133
Driver Short Circuit Current
vs Temperature
Driver Short Circuit
Current vs VCC
00851134
00851135
Receiver Short Circuit
Current vs Temperature
Receiver Short Circuit
Current vs VCC
00851136
00851137
11
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Typical Applications
ESDI Application
00851111
ST504 and ST412 Applications
00851112
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12
Physical Dimensions inches (millimeters) unless otherwise noted
SO Package (M)
Order Number DS8922M, DS8922AM, or DS8923AM
NS Package Number M16A
Molded Dual-In-Line Package (N)
Order Number DS8922N, DS8922AN, or DS8923AN
NS Package Number N16E
13
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Notes
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whose failure to perform when properly used in
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2. A critical component is any component of a life
support device or system whose failure to perform
can be reasonably expected to cause the failure of
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safety or effectiveness.
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