HITACHI HD26C32A

HD26C32A
Quadruple Differential Line Receivers With 3 State Outputs
ADE-205-575 (Z)
1st. Edition
Dec. 2000
Description
The HD26C32A provides differential line receivers which realize low power dissipation by CMOS process.
The device has four receivers which meet the requirements of EIA standard RS-422A and RS-423A in a 16
pin package.
The enable function is common to all four receivers and offers a choise of active high or active low inputs.
Fail safe design ensures that if the inputs are open the outputs will always be high.
Features
•
•
•
•
•
•
•
•
•
Low power dissipation with CMOS process
Meets EIA standard RS-422A/423A
Input sensitivity: ±0.2V (In the range of ±7 V of common mode input voltage)
Propagation delay time: 19 ns typ
Input hysteresis width: 60 mV typ
Three state outputs
Differential Inputs are includes fail safe circuit
Power up and power down protection
Pin to pin compatible with HD26LS32/32A
HD26C32A
Pin Arrangement
IN A1 1
16 VCC
IN A2 2
15 IN B1
OUT A 3
14 IN B2
Enable 4
13 OUT B
OUT C 5
12 Enable
IN C2 6
11 OUT D
IN C1 7
10 IN D2
GND 8
9 IN D1
(Top view)
Function Table
Differential Input
Enable
Enable
Outputs
VID ≥ VTH or OPEN
H
X
H
X
L
H
X
X
L
H
X
X
L
L
H
VTL < VID < VTH
VID ≥ VTH
X
H
L
Z
X
?
2
:
:
:
:
:
High level
Low level
High impedance
Irrelevant
Indeterminate
?
L
Z
HD26C32A
Absolute Maximum Ratings (Ta = 25°C)
Item
Symbol
Ratings
Unit
VCC
7
V
VCM
±14
V
Differential Input Voltage*
VDIFF
±14
V
Enable Input Voltage
VIN
7
V
Output Current
IO
±25
mA
Storage Temperature
Tstg
–65 to +150
°C
2
Supply Voltage*
Common Mode Input Voltage
3
Notes: 1. The absolute maximum ratings are values which must not individually be exceeded, and
furthermore, no two of which may be realized at the same time.
2. All voltage values except for differential input voltage are with respect to network ground
terminal.
3. Differential input voltage is measured at the noninverting input with respect to the corresponding
inverting input.
Recommended Operating Conditions (Ta = –40°C to +85°C)
Item
Symbol
Min
Typ
Max
Unit
Supply Voltage
VCC
4.5
5.0
5.5
V
Common Mode Input Voltage
VCM
—
—
±7
V
Differential Input Voltage
VDIFF
—
—
±7
V
Output Current
IO
—
—
±6
mA
Operating Temperature
Topr
–40
—
85
°C
Enable Input Rise / Fall Time
t r, t f
—
—
500
ns
Note:
1. This item guarantees maximum limit when one input switchies.
Waveform: Refer to test circuit of switching characteristics.
3
HD26C32A
Logic Diagram
IN A2
+
IN A1
–
OUT A
+
IN B2
OUT B
IN B1
–
IN C2
+
IN C1
–
IN D2
+
IN D1
–
OUT C
OUT D
Enable G
Enable G
Electrical Characteristics (Ta = –40°C to +85°C, VCC = 5 V ± 10%)
Item
Symbol
Min
Typ
Max
Unit
Conditions
Diffrential Input
VTH
—
—
0.2
V
VCM = –7 to 7 V, VOUT ≥ 3.8 V
Threshold Voltage
VTL
—
—
–0.2
V
VCM = –7 to 7 V, VOUT ≤ 0.3 V
Input Hysteresis
VHYST
—
60
—
mV
VCM = 0 V
Enable Input
VIH
2.0
—
—
V
Voltage
VIL
—
—
0.8
V
Output Voltage
VOH
3.8
4.2
—
V
VCC = 4.5 V, VDIEF = 1 V, IOUT = –6.0 mA
VOL
—
0.2
0.3
V
VCC = 5.5 V, VDIEF = –1 V, IOUT = 6.0 mA
I OZ
—
0.5
5.0
µA
Enable = 0.8 V, Enable = 2.0 V VOUT = VCC
—
–0.5
–5.0
µA
Enable = 0.8 V, Enable = 2.0 V VOUT = GND
1.1
1.5
mA
VIN = 10 V, Other Input = GND
–0.1* —
0.6
mA
VIN = 3 V, Other Input = GND
0
—
–1.1
mA
VIN = –3 V, Other Input = GND
—
–2.0
-2.5
mA
VIN = –10 V, Other Input = GND
—
—
1.0
µA
VI = VCC
—
—
–1.0
µA
VI = GND
5.8
6.8
10
kΩ
VCM = –7 to 7 V (One Input AC GND)
16
23
mA
VCC = 5.5 V, VDIEF = 1 V
Output Leak
CurrentI
Input Current
I IN
—
1
Enable Input
II
Current
Input Resistance
RIN
Supply Current
I CC
Note:
4
1. This specification is nonstandard of RS-422A.
HD26C32A
Switching Characteristics (Ta = –40°C to +85°C, VCC = 5 V ± 10%)
Item
Symbol
Min
Typ
Max
Unit
Conditions
Propagation Delay Time
t PLH
7
16
25
ns
CL = 50 pF, VDIEF = 2.5 V, VCM = 0 V
t PHL
7
16
25
ns
t RISE
—
4
9
ns
4
9
ns
13
22
ns
CL = 50 pF, RL = 1000 Ω
13
22
ns
VDIEF = 2.5 V
13
22
ns
CL = 50 pF, RL = 1000 Ω
13
22
ns
VDIEF = 2.5 V
Output Rise / Fall Time
t FALL
Output Disable Time
t LZ
—
t HZ
Output Enable Time
t ZL
t ZH
—
CL = 50 pF, VDIEF = 2.5 V, VCM = 0 V
5
HD26C32A
1. tPLH, tPHL, tRISE, tFALL
Test Circuit
Input
+
Pulse
Generater
Output
–
CL =
50 pF
*1
*2
2V
Wave forms
2.5 V
Input +
0V
0V
–2.5 V
2.5 V
Input –
0V
0V
–2.5 V
t PLH
t PHL
90 %
Output
50 %
10 %
tr
6
VOH
90 %
50 %
10 %
tf
VOL
HD26C32A
2. tHZ, tZH
Test Circuit
+
2.5 V
Output
–
CL =
50 pF
RL =
1000 Ω
Input
*2
Pulse
Generater
*1
2V
*3
Wave forms
3V
Enable
1.3 V
1.3 V
0V
3V
1.3 V
1.3 V
Enable
0V
t ZH
Output
t HZ
50 %
0.5 V
VOH
VOL
7
HD26C32A
3. tLZ, tZL
Test circuit
VCC
RL =
1000 Ω
+
–2.5 V
Output
–
CL =
50 pF
Input
Pulse
Generator
2V
Wave forms
3V
Enable
1.3 V
1.3 V
0V
3V
1.3 V
1.3 V
Enable
0V
t ZL
t LZ
VOH
Output
50 %
0.5 V
Notes:
1.
2.
3.
8
VOL
The pulse generator has the following characteristics:
PRR = 1 MHz, 50 % duty cycle, tr ≤ 6 ns, tf ≤ 6 ns, Zout = 50 Ω
CL includes probe and jig capacitance.
To test Enable input, ground Enable input and apply an inverted input waveform.
HD26C32A
HD26C32A Line Receiver Applications
The HD26C32A is a line receiver that meets the EIA RS-422A and RS-423A conditions. It has a high inphase input voltage range, both positive and negative, enabling highly reliable transmission to be
performed even in noisy environments.
Its main features are listed below.
•
•
•
•
•
Operates on a single 5 V power supply.
±0.2 V input sensitivity in in-phase input voltage ±7 V range
Three-state output
On-chip input fail-safe circuit
On-chip power up/down protection circuit
As shown by the logic diagram, the enable function is common to all four drivers, and either active-high or
active-low input can be selected.
Output Voltage VOUT (V)
When exchange is carried out using a party line system, it is better to keep the receiver input bias current
constituting the driver load small, as this allows more receivers to be connected.
Output Voltage vs. Differential Input Voltage
6.0
Ta = 25°C
VCC = 5 V
5.0
4.0
3.0
VCM = +7 V
VCM = 0 V
VCM = –7 V
2.0
1.0
0.0
–80
–40
0
40
80
Differential Input Voltage VDIFF (mV)
Figure 1 Differential Input Voltage vs. Output Voltage Characteristics
9
HD26C32A
Input Current vs. Input Voltage
2.0
Input Current IIN (mA)
Ta = 25°C
1.2
C
=
V
0
VC
0.4
0.0
5
C
=
5.
V
VC
–0.4
–1.2
–2.0
–15
9
–3 0 3
9
Input Voltage VIN (V)
15
Figure 2 Input Voltage vs. Input Current Characteristics
VCC
R1
Driver
R2
Receiver
RT
R1
R2
Differential Input Voltage vs. R1
0.4
50
=
VCC
Ω
0k
=
R2
R2
=3
0.5
kΩ
0k
Ω
0.6
R2
Differential Input Voltage VDIEF (V)
Figure 3 Method of Enhancing Fail-Safe Function
10
00
2=3
R1
kΩ
R2
R
R2 =
0.3
∞
100Ω
Ta = 25°C
VCC = 5 V
0.2
VDIFF
R1
R2
0.1
0
5
10
15
R1 (kΩ)
Figure 4 R 1, R2 vs. Differential Input Voltage
10
HD26C32A
1. Unidirectional Transmission (1 : 1 Configuration)
Driver B
Data Input
D
A
Receiver
F
RT
C
Data Output
E
Figure 5 1 : 1 Unidirectional Transmission
H : 5 µs/div
V : 2 V/div
Line : 1200 m, Duty : 50%
Frequency : 100 kHz, RT : 100 Ω
A
D
GND–
GND–
E
B
GND–
GND–
C
F
GND–
GND–
H : 50 ns/div
V : 2 V/div
Line : 12 m, Duty : 50%
Frequency : 10 MHz, RT : 100 Ω
A
D
GND–
GND–
E
B
GND–
GND–
C
F
GND–
GND–
Figure 6 Sample Transmission Waveforms
11
HD26C32A
2. Unidirectional Transmission (1 : n Configuration)
Driver
Data
Input
Receiver
RT
RT
Data
Output
Enable
Receiver
Data
Output
Data
Output
Data
Output
Figure 7 1:n Unidirectional Transmission
With this connection method, n receivers are connected for one driver. In the RS-422A standard, ten
receivers can be connected simultaneously for one driver.
Conversely, it is also possible to connect one receiver for n drivers.
3. Bidirectional Transmission
Driver
Data
Input/
Output
Receiver
RT
Data
Input/
Output
RT
Enable
Enable
Receiver
Driver
Figure 8 Bidirectional Transmission
When bidirectional data exchange is performed using a combination of the HD26C31 and HD26C32A,
since either high or low output control is possible, using complementary enable inputs for the driver and
receiver makes it easy to configure the kind of combination illustrated in figure 8.
Extending this combination makes it possible to exchange n-bit data simultaneously, and handle a party
line system.
12
HD26C32A
Package Dimensions
Unit: mm
19.20
20.00 Max
6.30
9
1
7.40 Max
16
8
1.3
0.48 ± 0.10
7.62
2.54 Min 5.06 Max
2.54 ± 0.25
0.51 Min
1.11 Max
+ 0.13
0.25 – 0.05
0° – 15°
Hitachi Code
JEDEC
EIAJ
Mass (reference value)
DP-16
Conforms
Conforms
1.07 g
Unit: mm
10.06
10.5 Max
9
1
8
1.27
*0.42 ± 0.08
0.40 ± 0.06
0.10 ± 0.10
0.80 Max
*0.22 ± 0.05
0.20 ± 0.04
2.20 Max
5.5
16
0.20
7.80 +– 0.30
1.15
0° – 8°
0.70 ± 0.20
0.15
0.12 M
*Dimension including the plating thickness
Base material dimension
Hitachi Code
JEDEC
EIAJ
Mass (reference value)
FP-16DA
—
Conforms
0.24 g
13
HD26C32A
Cautions
1. Hitachi neither warrants nor grants licenses of any rights of Hitachi’s or any third party’s patent,
copyright, trademark, or other intellectual property rights for information contained in this document.
Hitachi bears no responsibility for problems that may arise with third party’s rights, including
intellectual property rights, in connection with use of the information contained in this document.
2. Products and product specifications may be subject to change without notice. Confirm that you have
received the latest product standards or specifications before final design, purchase or use.
3. Hitachi makes every attempt to ensure that its products are of high quality and reliability. However,
contact Hitachi’s sales office before using the product in an application that demands especially high
quality and reliability or where its failure or malfunction may directly threaten human life or cause risk
of bodily injury, such as aerospace, aeronautics, nuclear power, combustion control, transportation,
traffic, safety equipment or medical equipment for life support.
4. Design your application so that the product is used within the ranges guaranteed by Hitachi particularly
for maximum rating, operating supply voltage range, heat radiation characteristics, installation
conditions and other characteristics. Hitachi bears no responsibility for failure or damage when used
beyond the guaranteed ranges. Even within the guaranteed ranges, consider normally foreseeable
failure rates or failure modes in semiconductor devices and employ systemic measures such as failsafes, so that the equipment incorporating Hitachi product does not cause bodily injury, fire or other
consequential damage due to operation of the Hitachi product.
5. This product is not designed to be radiation resistant.
6. No one is permitted to reproduce or duplicate, in any form, the whole or part of this document without
written approval from Hitachi.
7. Contact Hitachi’s sales office for any questions regarding this document or Hitachi semiconductor
products.
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Colophon 2.0
14