NEC’s PS9821 is an optically coupled high-speed isolator containing a GaAlAs LED on the input side and
a photodiode and a signal processing circuit on the output side on one chip.
FEATURES
• Supply Voltage 3.3V
• Open collector output
• High common mode transient immunity (CM
H
, CM
L
=
±15
kV/
µ
s Min.)
• Small package (SO8)
• High-speed (10 Mbps)
• High isolation voltage (BV = 2 500 Vr.m.s.)
APPLICATIONS
• Factory Automation Network
• Measurement equipment
• PDP
The information in this document is subject to change without notice. Before using this document, please confirm that
this is the latest version.
California Eastern Laboratories
PS9821-1/-2
PACKAGE DIMENSIONS (UNIT: mm)
PS9821-1/-2
Preliminary Data Sheet
PS9821-1/-2
ABSOLUTE MAXIMUM RATINGS (T
A
= 25° C, unless otherwise specified)
°
Parameter
Diode
Forward Current
Reverse Voltage
Detector
Symbol
I
F
V
R
V
CC
V
O
I
O
P
C
BV
T
A
T
stg
Ratings
20
5
7
7
25
40
2 500
−40
to +85
−55
to +125
Unit
mA
V
V
V
mA
mW
Vr.m.s.
°C
°C
Supply Voltage
Output Voltage
Output Current
Power Dissipation
*1
Isolation Voltage
Operating Ambient Temperature
Storage Temperature
*1
AC voltage for 1 minute at T
A
= 25°C, RH = 60% between input and output.
RECOMMENDED OPERATING CONDITIONS
Parameter
Low Level Input Voltage
High Level Input Current
Supply Voltage
TTL (R
L
= 1 kΩ, loads)
Pull-up resistor
Symbol
V
FL
I
FH
V
CC
N
R
L
330
MIN.
0
6.3
2.7
-
TYP.
MAX.
0.8
12.5
3.6
5
4k
Ω
Unit
V
mA
V
Preliminary Data Sheet
PS9821-1/-2
ELECTRICAL CHARACTERISTICS (T
A
=
−
40 to +85°C, unless otherwise specified)
Parameter
Diode
Forward Voltage
Reverse Current
Terminal Capacitance
Detector
High Level Output Current
Low Level Output Voltage
*2
Symbol
V
F
I
R
C
t
I
OH
V
OL
I
CCH
I
CCL
I
FHL
Conditions
I
F
= 10 mA, T
A
= 25°C
V
R
= 3 V, T
A
= 25°C
V = 0 V, f = 1 MHz, T
A
= 25°C
V
CC
= V
O
=3.3 V, V
F
= 0.8 V
V
CC
= 3.3 V, I
F
= 5 mA, I
OL
= 8 mA
V
CC
= 3.3 V, I
F
= 0 mA
V
CC
= 3.3 V, I
F
= 10 mA
V
CC
= 3.3 V, V
O
= 0.8 V, R
L
= 350
Ω
V
I-O
= 1 kV
DC
, RH = 40 to 60%,
T
A
= 25°C
V = 0 V, f = 1 MHz, T
A
= 25°C
V
CC
= 3.3 V, R
L
= 350
Ω,
I
F
= 7.5 mA
T
A
= 25°C
MIN.
1.4
TYP.
*1
MAX.
1.8
10
Unit
V
1.65
µ
A
pF
30
0.3
0.3
4.5
7.0
3
50
0.6
7
10
5
µ
A
V
mA
mA
mA
High Level Supply Current
Low Level Supply Current
Coupled
Threshold Input Current
(H
→
L)
Isolation Resistance
Isolation Capacitance
Propagation Delay Time
(H
→
L)
*3
R
I-O
C
I-O
t
PHL
10
11
Ω
0.9
-
75
pF
ns
Propagation Delay Time
(L
→
H)
*3
t
PLH
V
CC
= 3.3 V, R
L
= 350
Ω,
I
F
= 7.5 mA
T
A
= 25°C
90
ns
Rise Time
Fall Time
Pulse Width Distortion
*3
(PWD)
Propagation Delay Skew
Common Mode
Transient Immunity at High
*4
Level Output
Common Mode
Transient Immunity at Low
*4
Level Output
t
r
t
f
V
CC
=3.3 V, R
L
= 350
Ω,
I
F
= 7.5 mA
V
CC
= 3.3 V, R
L
= 350
Ω,
I
F
= 7.5 mA
20
10
-
25
ns
t
PHL
−t
PLH
V
CC
=3.3 V, R
L
= 350
Ω,
I
F
= 7.5 mA
T
A
= 25°C
t
PSK
V
CC
= 3.3 V, R
L
= 350
Ω,
I
F
= 7.5 mA
T
A
= 25°C
CM
H
R
L
= 350
Ω,
T
A
= 25°C, I
F
= 0 mA,
V
O (MIN.)
= 2 V, V
CM
= 50V
R
L
= 350
Ω,
T
A
= 25°C, I
F
= 7.5 mA,
V
O (MAX.)
= 0.8 V, V
CM
= 50V
15
40
kV/
µ
s
CM
L
15
kV/
µ
s
Life Support Applications
These NEC products are not intended for use in life support devices, appliances, or systems where the malfunction of these products can reasonably
be expected to result in personal injury. The customers of CEL using or selling these products for use in such applications do so at their own risk and
agree to fully indemnify CEL for all damages resulting from such improper use or sale.
08/30/2004
A Business Partner of NEC Compound Semiconductor Devices, Ltd.
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