Features
•HCMOS/LSTTL/TTL performance compatible
•1000 V/µs minimum Common Mode Rejection (CMR) at
VCM = 50 V (HCPL-261A family) and 15 kV/µs minimum
CMR at VCM = 1000 V (HCPL-261N family)
•High speed: 10 MBd typical
•AC and DC performance specified over industrial
temperature range -40°C to +85°C
•Available in 8 pin DIP, SOIC-8 packages
•Safety approval:
–UL recognized per UL1577 3750 V rms for 1 minute and
5000 V rms for 1 minute (Option 020)
–CSA Approved
–IEC/EN/DIN EN 60747-5-2 approved with
VIORM = 630 Vpeak for HCPL-261A/261N Option 060
Applications
•Low input current (3.0 mA) HCMOS compatible version
of 6N137 optocoupler
•Isolated line receiver
•Simplex/multiplex data transmission
•Computer-peripheral interface
•Digital isolation for A/D, D/A conversion
•Switching power supplies
•Instrumentation input/output isolation
•Ground loop elimination
•Pulse transformer replacement
HCPL-261A, HCPL-061A, HCPL-263A, HCPL-063A
HCPL-261N, HCPL-061N, HCPL-263N, HCPL-063N
The connection of a 0.1 µF bypass capacitor
between pins 5 and 8 is required.
Functional Diagram
CAUTION: It is advised that normal static precautions be taken in handling and assembly of this component to
prevent damage and/or degradation which may be induced by ESD.
1
2
3
4
8
7
6
5
CATHODE
ANODE
GND
V
VCC
O
1
2
3
4
8
7
6
5
ANODE 2
CATHODE 2
CATHODE 1
ANODE 1
GND
V
VCC
O2
VEVO1
HCPL-261A/261N
HCPL-061A/061N HCPL-263A/263N
HCPL-063A/063N
NC
NC SHIELD SHIELD
LED
ON
OFF
ON
OFF
ON
OFF
ENABLE
H
H
L
L
NC
NC
OUTPUT
L
H
H
H
L
H
TRUTH TABLE
(POSITIVE LOGIC)
LED
ON
OFF
OUTPUT
L
H
TRUTH TABLE
(POSITIVE LOGIC)
HCPL-261A
HCMOS Compatible, High CMR, 10 MBd Optoc ouplers
Data Sheet
Description
The HCPL-261A family of optically coupled gates shown
on this data sheet provide all the benefits of the
industry standard 6N137 family with the added benefit
of HCMOS compatible input current. This allows direct
interface to all common circuit topologies without
additional LED buffer or drive components. The AlGaAs
LED used allows lower drive currents and reduces
degradation by using the latest LED technology. On
the single channel parts, an enable output allows the
detector to be strobed. The output of the detector IC is
an open collector schottky-clamped transistor. The
internal shield provides a minimum common mode
transient immunity of 1000 V/µs for the HCPL-261A
family and 15000 V/µs for the HCPL-261N family.
2
Schematic
SHIELD
8
6
5
2+
3
V
F
USE OF A 0.1 µF BYPASS CAPACITOR CONNECTED
BETWEEN PINS 5 AND 8 IS RECOMMENDED (SEE NOTE 16).
–
I
F
I
CC
V
CC
V
O
GND
I
O
V
E
I
E
7
HCPL-261A/261N
HCPL-061A/061N
SHIELD
8
7
+
2
VF1
–
IF1
ICC VCC
VO1
IO1
1
SHIELD
6
5
–
4
VF2
+
IF2 VO2
GND
IO2
3
HCPL-263A/263N
HCPL-063A/063N
Ordering Information
Specify Part Number followed by Option Number (if desired).
Example:
HCPL-261A#XXXX
020 = 5000 V rms/1 minute UL Rating Option*
060 = IEC/EN/DIN EN 60747-5-2 VIORM = 630 Vpeak Option**
300 = Gull Wing Surface Mount Option***
500 = Tape and Reel Packaging Option
XXXE = Lead Free Option
Option data sheets available. Contact your Avago sales representative or authorized distributor for information.
Remarks: The notation “#” is used for existing products, while (new) products launched since 15th July 2001 and lead free option will use “–”
*For HCPL-261A/261N/263A/263N (8-pin DIP products) only.
**For HCPL-261A/261N only. Combination of Option 020 and Option 060 is not available.
***Gull wing surface mount option applies to through hole parts only.
Selection Guide
Widebody
Minimum CMR 8-Pin DIP (300 Mil) Small-Outline SO-8(400 Mil) Hermetic
On- Single Dual Single Dual Single Single and
dV/dt VCM Current Output Channel Channel Channel Channel Channel Dual Channel
(V/µs) (V) (mA) Enable Package Package Package Package Package Packages
NA NA 5 YES 6N137[1] HCPL-0600[1] HCNW137[1]
NO HCPL-2630[1] HCPL-0630[1]
5,000 50 YES HCPL-2601[1] HCPL-0601[1] HCNW2601[1]
NO HCPL-2631[1] HCPL-0631[1]
10,000 1,000 YES HCPL-2611[1] HCPL-0611[1] HCNW2611[1]
NO HCPL-4661[1] HCPL-0661[1]
1,000 50 YES HCPL-2602[1]
3,500 300 YES HCPL-2612[1]
1,000 50 3 YES HCPL-261A HCPL-061A
NO HCPL-263A HCPL-063A
1,000[2] 1,000 YES HCPL-261N HCPL-061N
NO HCPL-263N HCPL-063N
1,000 50 12.5 [3] HCPL-193X[1]
HCPL-56XX[1]
HCPL-66XX[1]
Notes:
1. Technical data are on separate Avago publications.
2. 15 kV/µs with VCM = 1 kV can be achieved using Avago application circuit.
3. Enable is available for single channel products only, except for HCPL-193X devices.
Input
3
HCPL-261A/261N/263A/263N Outline Drawing
Pin Location (for reference only)
Figure 2. Gull wing surface mount option #300.
Figure 1. 8-Pin dual in-line package device outline drawing.
9.40 (0.370)
9.90 (0.390)
PIN ONE
1.78 (0.070) MAX.
A XXXXZ
YYWW
OPTION CODE*
DATE CODE
0.76 (0.030)
1.40 (0.056) 2.28 (0.090)
2.80 (0.110)
0.51 (0.020) MIN.
0.65 (0.025) MAX.
4.70 (0.185) MAX.
2.92 (0.115) MIN.
6.10 (0.240)
6.60 (0.260)
0.20 (0.008)
0.33 (0.013)
5° TYP.
7.36 (0.290)
7.88 (0.310)
DIMENSIONS IN MILLIMETERS AND (INCHES).
5678
4321
1.19 (0.047) MAX.
TYPE NUMBER
* MARKING CODE LETTER FOR OPTION NUMBERS.
"L" = OPTION 020
"V" = OPTION 060
OPTION NUMBERS 300 AND 500 NOT MARKED.
NOTE: FLOATING LEAD PROTRUSION IS 0.25 mm (10 mils) MAX.
3.56 ± 0.13
(0.140 ± 0.005)
0.635 ± 0.25
(0.025 ± 0.010) 12° NOM.
9.65 ± 0.25
(0.380 ± 0.010)
0.635 ± 0.130
(0.025 ± 0.005)
7.62 ± 0.25
(0.300 ± 0.010)
5
6
7
8
4
3
2
1
9.65 ± 0.25
(0.380 ± 0.010)
6.350 ± 0.25
(0.250 ± 0.010)
1.02 (0.040)
1.27 (0.050)
10.9 (0.430)
2.0 (0.080)
LAND PATTERN RECOMMENDATION
1.080 ± 0.320
(0.043 ± 0.013)
3.56 ± 0.13
(0.140 ± 0.005)
1.780
(0.070)
MAX.
1.19
(0.047)
MAX.
2.540
(0.100)
BSC
DIMENSIONS IN MILLIMETERS (INCHES).
TOLERANCES (UNLESS OTHERWISE SPECIFIED):
LEAD COPLANARITY
MAXIMUM: 0.102 (0.004)
NOTE: FLOATING LEAD PROTRUSION IS 0.25 mm (10 mils) MAX.
xx.xx = 0.01
xx.xxx = 0.005
0.20 (0.008)
0.33 (0.013)
4
HCPL-061A/061N/063A/063N Outline Drawing
Figure 3. 8-Pin Small Outline Package Device Drawing.
Regulatory Information
The HCPL-261A and HCPL-261N
families have been approved by
the following organizations:
UL
Recognized under UL 1577,
Component Recognition Program,
File E55361.
CSA
Approved under CSA Component
Acceptance Notice #5, File CA
88324.
IEC/EN/DIN EN 60747-5-2
Approved under:
IEC 60747-5-2:1997 + A1:2002
EN 60747-5-2:2001 + A1:2002
DIN EN 60747-5-2 (VDE 0884
Teil 2):2003-01.
(Option 060 only)
XXX
YWW
8765
4321
5.994 ± 0.203
(0.236 ± 0.008)
3.937 ± 0.127
(0.155 ± 0.005)
0.406 ± 0.076
(0.016 ± 0.003) 1.270
(0.050)BSC
* 5.080 ± 0.127
(0.200 ± 0.005)
3.175 ± 0.127
(0.125 ± 0.005) 1.524
(0.060)
45° X 0.432
(0.017)
0.228 ± 0.025
(0.009 ± 0.001)
TYPE NUMBER
(LAST 3 DIGITS)
DATE CODE
0.305
(0.012)MIN.
* TOTAL PACKAGE LENGTH (INCLUSIVE OF MOLD FLASH)
5.207 ± 0.254 (0.205 ± 0.010)
DIMENSIONS IN MILLIMETERS (INCHES).
LEAD COPLANARITY = 0.10 mm (0.004 INCHES) MAX.
0.203 ± 0.102
(0.008 ± 0.004)
7°
NOTE: FLOATING LEAD PROTRUSION IS 0.15 mm (6 mils) MAX.
7.49 (0.295)
1.9 (0.075)
0.64 (0.025)
LAND PATTERN RECOMMENDATION
Solder Reflow Thermal Profile
Recommended Pb-Free IR Profile
0
TIME (SECONDS)
TEMPERATURE (°C)
200
100
50 150100 200 250
300
0
30
SEC.
50 SEC.
30
SEC.
160°C
140°C
150°C
PEAK
TEMP.
245°C
PEAK
TEMP.
240°C PEAK
TEMP.
230°C
SOLDERING
TIME
200°C
PREHEATING TIME
150°C, 90 + 30 SEC.
2.5°C ± 0.5°C/SEC.
3°C + 1°C/–0.5°C
TIGHT
TYPICAL
LOOSE
ROOM
TEMPERATURE
PREHEATING RATE 3°C + 1°C/–0.5°C/SEC.
REFLOW HEATING RATE 2.5°C ± 0.5°C/SEC.
217 °C
RAMP-DOWN
6 °C/SEC. MAX.
RAMP-UP
3 °C/SEC. MAX.
150 - 200 °C
260 +0/-5 °C
t 25 °C to PEAK
60 to 150 SEC.
20-40 SEC.
TIME WITHIN 5 °C of A CTUAL
PEAK TEMPERA TURE
tp
ts
PREHEAT
60 to 180 SEC.
tL
TL
Tsmax
Tsmin
25
Tp
TIME
TEMPERATURE
NOTES:
THE TIME FROM 25 °C to PEAK TEMPERATURE = 8 MINUTES MAX.
Tsmax = 200 °C, Tsmin = 150 °C
5
Insulation and Safety Related Specifications
8-Pin DIP
(300 Mil) SO-8
Parameter Symbol Value Value Units Conditions
Minimum External Air L(101) 7.1 4.9 mm Measured from input terminals to
Gap (External output terminals, shortest distance
Clearance) through air.
Minimum External L(102) 7.4 4.8 mm Measured from input terminals to
Tracking (External output terminals, shortest distance
Creepage) path along body.
Minimum Internal Plastic 0.08 0.08 mm Through insulation distance, conductor
Gap (Internal Clearance) to conductor, usually the direct
distance between the photoemitter and
photodetector inside the optocoupler
cavity.
Tracking Resistance CTI 200 200 Volts DIN IEC 112/ VDE 0303 Part 1
(Comparative Tracking
Index)
Isolation Group IIIa IIIa Material Group (DIN VDE 0110, 1/89,
Table 1)
Option 300 – surface mount classification is Class A in accordance with CECC 00802.
IEC/EN/DIN EN 60747-5-2 Insulation Related Characteristics
(HCPL-261A/261N Option 060 ONLY)
Description Symbol Characteristic Units
Installation classification per DIN VDE 0110/1.89, Table 1
for rated mains voltage ≤300 V rms I-IV
for rated mains voltage ≤450 V rms I-III
Climatic Classification 55/85/21
Pollution Degree (DIN VDE 0110/1.89) 2
Maximum Working Insulation Voltage VIORM 630 V peak
Input to Output Test Voltage, Method b*
VIORM x 1.875 = VPR, 100% Production Test with tm = 1 sec, VPR 1181 V peak
Partial Discharge < 5 pC
Input to Output Test Voltage, Method a*
VIORM x 1.5 = VPR, Type and sample test, tm = 60 sec, VPR 945 V peak
Partial Discharge < 5 pC
Highest Allowable Overvoltage*
(Transient Overvoltage, tini = 10 sec) VIOTM 6000 V peak
Safety Limiting Values
(Maximum values allowed in the event of a failure,
also see Figure 18, Thermal Derating curve.)
Case Temperature TS175 °C
Input Current IS,INPUT 230 mA
Output Power PS,OUTPUT 600 mW
Insulation Resistance at TS, VIO = 500 V RS≥109Ω
*Refer to the front of the optocoupler section of the current catalog, under Product Safety Regulations section IEC/EN/DIN EN 60747-5-2 for a
detailed description.
Note: Isolation characteristics are guaranteed only within the safety maximum ratings which must be ensured by protective circuits in application.
6
Absolute Maximum Ratings
Parameter Symbol Min. Max. Units Note
Storage Temperature TS-55 125 °C
Operating Temperature TA-40 +85 °C
Average Input Current IF(AVG) 10 mA 1
Reverse Input Voltage VR3 Volts
Supply Voltage VCC -0.5 7 Volts 2
Enable Input Voltage VE-0.5 5.5 Volts
Output Collector Current (Each Channel) IO50 mA
Output Power Dissipation (Each Channel) PO60 mW 3
Output Voltage (Each channel) VO-0.5 7 Volts
Lead Solder Temperature 260°C for 10 s, 1.6 mm Below Seating Plane
(Through Hole Parts Only)
Solder Reflow Temperature Profile See Package Outline Drawings section
(Surface Mount Parts Only)
Recommended Operating Conditions
Parameter Symbol Min. Max. Units
Input Voltage, Low Level VFL -3 0.8 V
Input Current, High Level IFH 3.0 10 mA
Power Supply Voltage VCC 4.5 5.5 Volts
High Level Enable Voltage VEH 2.0 VCC Volts
Low Level Enable Voltage VEL 00.8 Volts
Fan Out (at RL = 1 kΩ)N 5TTL Loads
Output Pull-up Resistor RL330 4k Ω
Operating Temperature TA-40 85 °C
7
Electrical Specifications
Over recommended operating temperature (TA = -40°C to +85°C) unless otherwise specified.
Parameter Symbol Min. Typ.* Max. Units Test Conditions Fig. Note
High Level Output IOH 3.1 100 µAV
CC = 5.5 V, VO = 5.5 V, 4 18
Current VF = 0.8 V, VE = 2.0 V
Low Level Output VOL 0.4 0.6 V VCC = 5.5 V, IOL = 13 mA 5, 8 4, 18
Voltage (sinking), IF = 3.0 mA,
VE = 2.0 V
High Level Supply ICCH 710mAV
E = 0.5 V** VCC = 5.5 V 4
915 Dual Channel
Products***
Low Level Supply ICCL 813mA V
E = 0.5 V** VCC = 5.5 V
12 21 Dual Channel
Products***
High Level Enable IEH -0.6 -1.6 mA VCC = 5.5 V, VE = 2.0 V
Current**
Low Level Enable IEL -0.9 -1.6 mA VCC = 5.5 V, VE = 0.5 V
Current**
Input Forward VF1.0 1.3 1.6 V IF = 4 mA 6 4
Voltage
Temperature Co- ∆VF/∆TA-1.25 mV/°CI
F = 4 mA 4
efficient of Forward
Voltage
Input Reverse BVR35 VI
R = 100 µA4
Breakdown V oltage
Input Capacitance CIN 60 pF f = 1 MHz, VF = 0 V
*All typical values at TA = 25°C, VCC = 5 V
**Single Channel Products only (HCPL-261A/261N/061A/061N)
***Dual Channel Products only (HCPL-263A/263N/063A/063N)
IF = 0 mA
IF = 3.0 mA
Current
Current
8
Common Mode Transient Immunity Specifications, All values at TA = 25°C
Parameter Device Symbol Min. Typ. Max. Units Test Conditions Fig. Note
Output High HCPL-261A |CMH|1 5 kV/µsV
CM = 50 V VCC = 5.0 V, 17 4, 13,
Level Common HCPL-061A RL = 350 Ω,15, 18
Mode Transient HCPL-263A IF = 0 mA,
Immunity HCPL-063A TA = 25°C
HCPL-261N 1 5 kV/µsV
CM = 1000 V
HCPL-061N
HCPL-263N 15 25 kV/µsUsing Avago 20 4, 13,
HCPL-063N App Circuit 15
Output Low HCPL-261A |CML|1 5 kV/µsV
CM = 50 V VCC = 5.0 V, 17 4, 14,
Level Common HCPL-061A RL = 350 Ω,15, 18
Mode Transient HCPL-263A IF = 3.5 mA,
Immunity HCPL-063A VO(MAX) = 0.8 V
HCPL-261N 1 5 kV/µsV
CM = 1000 V
HCPL-061N
HCPL-263N 15 25 kV/µsUsing Avago 20 4, 14,
HCPL-063N App Circuit 15
VO(MIN) = 2 V
TA = 25°C
Switching Specifications
Over recommended operating temperature (TA = -40°C to +85°C) unless otherwise specified.
Parameter Symbol Min. Typ.* Max. Units Test Conditions Fig. Note
Input Current Threshold ITHL 1.5 3.0 mA VCC = 5.5 V, VO = 0.6 V, 7, 10 18
High to Low IO >13 mA (Sinking)
Propagation Delay tPLH 52 100 ns IF = 3.5 mA 9, 11, 4, 9,
Time to High Output VCC = 5.0 V, 12 18
Level VE = Open,
Propagation Delay tPHL 53 100 ns 9, 1 1, 4, 1 0,
Time to Low Output 12 18
Level
Pulse Width Distortion PWD 11 45 ns 9, 13 17, 18
|tPHL - tPLH|
Propagation Delay Skew tPSK 60 ns 24 11, 18
Output Rise Time tR42 ns 9, 14 4, 1 8
Output Fall Time tF12 ns 9, 14 4, 1 8
Propagation Delay tEHL 19 ns IF = 3.5 mA 15, 12
Time of Enable VCC = 5.0 V, 16
from VEH to VEL VEL = 0 V, VEH =3 V,
Propagation Delay tELH 30 ns 15, 12
Time of Enable 16
from VEL to VEH
*All typical values at TA = 25°C, VCC = 5 V.
CL=15 pF,
RL=350 Ω
CL=15pF,
RL = 350 Ω
9
Notes:
1. Peaking circuits may be used which
produce transient input currents up to
30 mA, 50 ns maximum pulse width,
provided the average current does not
exceed 10 mA.
2. 1 minute maximum.
3. Derate linearly above 80°C free-air
temperature at a rate of 2.7 mW /°C for
the SOIC-8 package.
4. Each channel.
5. Device considered a two-terminal device:
Pins 1, 2, 3, and 4 shorted together and
Pins 5, 6, 7, and 8 shorted together.
6. In accordance with UL1577, each
optocoupler is proof tested by applying an
insulation test voltage ≥4500 VRMS for 1
second (leakage detection current limit,
II-O ≤ 5 µA). This test is performed before
the 100% production test for partial
discharge (method b) shown in the
IEC/EN/DIN EN 60747-5-2 Insulation
Characteristics Table, if applicable.
7. In accordance with UL1577, each
optocoupler is proof tested by applying an
insulation test voltage ≥6000 VRMS for 1
second (leakage detection current limit,
II-O ≤ 5 µA).
8. Measured between the LED anode and
cathode shorted together and pins 5
through 8 shorted together.
9. The tPLH propagation delay is measured
from the 1.75 mA point on the falling edge
of the input pulse to the 1.5 V point on the
rising edge of the output pulse.
10. The tPHL propagation delay is measured
from the 1.75 mA point on the rising edge
of the input pulse to the 1.5 V point on the
falling edge of the output pulse.
11. Propagation delay skew (tPSK) is equal to
the worst case difference in tPLH and/or
tPHL that will be seen between any two
units under the same test conditions and
operating temperature.
12. Single channel products only (HCPL-261A/
261N/061A/061N).
13. Common mode transient immunity in a
Logic High level is the maximum tolerable
|dVCM/dt| of the common mode pulse,
VCM, to assure that the output will remain
in a Logic High state (i.e., Vo > 2.0 V).
14. Common mode transient immunity in a
Logic Low level is the maximum tolerable
|dVCM/dt| of the common mode pulse,
VCM, to assure that the output will remain
in a Logic Low state (i.e., VO < 0.8 V).
15. For sinusoidal voltages
(|dVCM/dt|)max = πfCM VCM(P-P).
16. Bypassing of the power supply line is
required with a 0.1 µF ceramic disc
capacitor adjacent to each optocoupler as
shown in Figure 19. Total lead length
between both ends of the capacitor and
the isolator pins should not exceed 10 mm.
17. Pulse Width Distortion (PWD) is defined
as the difference between tPLH and tPHL for
any given device.
18. No external pull up is required for a high
logic state on the enable input of a single
channel product. If the VE pin is not used,
tying VE to VCC will result in improved CMR
performance.
19. Measured between pins 1 and 2 shorted
together, and pins 3 and 4 shorted
together. For dual channel parts only.
Package Characteristics
All Typicals at TA = 25°C
Parameter Sym. Package* Min. Typ. Max. Units Test Conditions Fig. Note
Input-Output VISO 3750 V rms RH ≤ 50%, 5, 6
Momentary With- t = 1 min.,
stand Voltage** TA = 25°C
Input-Output RI-O 1012 ΩVI-O = 500 Vdc 4, 8
Resistance
Input-Output CI-O 0.6 pF f = 1 MHz, 4, 8
Capacitance TA = 25°C
Input-Input II-I Dual Channel 0.005 µARH ≤ 45%, 19
Insulation t = 5 s,
Leakage Current VI-I = 500 V
Resistance RI-I Dual Channel 1011 Ω19
(Input-Input)
Capacitance CI-I Dual 8-pin DIP 0.03 pF f = 1 MHz 19
Dual SO-8 0.25
*Ratings apply to all devices except otherwise noted in the Package column.
**The Input-Output Momentary Withstand Voltage is a dielectric voltage rating that should not be interpreted as an input-output continuous voltage
rating. For the continuous voltage rating refer to the IEC/EN/DIN EN 60747-5-2 Insulation Characteristics Table (if applicable), your equipment level
safety specification or Avago Application Note 1074 entitled “Optocoupler Input-Output Endurance Voltage.”
†For 8-pin DIP package devices (HCPL-261A/261N/263A/263N) only.
(Input-Input)
OPT 020† 5000 5, 7
10
OUTPUT V
MONITORING
NODE
O
1.5 V
t
PHL
t
PLH
I
F
INPUT
O
V
OUTPUT
I = 3.5 mA
F
I = 1.75 mA
F
+5 V
7
5
6
8
2
3
4
1
PULSE GEN.
Z = 50 Ω
t = t = 5 ns
O
f
I
F
L
R
R
M
CC
V
0.1 µF
BYPASS
*C
L
*C IS APPROXIMATELY 15 pF WHICH INCLUDES
PROBE AND STRAY WIRING CAPACITANCE.
L
GND
INPUT
MONITORING
NODE
r
HCPL-261A/261N
VOL – LOW LEVEL OUTPUT VOLTAGE – V
-60
0.2
TA – TEMPERATURE – °C
100
0.5
0.6
-20
0.3
20 60-40 0 40 80
0.4
VCC = 5.5 V
VE = 2 V
IF = 3.0 mA
IO = 16 mA
IO = 12.8 mA
IO = 9.6 mA
IO = 6.4 mA
IOL – LOW LEVEL OUTPUT CURRENT – mA
-60
0
TA – TEMPERATURE – °C
100
60
80
-20
20
20
VCC = 5 V
VE = 2 V
VOL = 0.6 V
IF = 3.5 mA
60-40 0 40 80
40
I
OH
– HIGH LEVEL OUTPUT CURRENT – µA
-60
0
T
A
– TEMPERATURE – °C
100
10
15
-20
5
20
V
CC
= 5.5 V
V
O
= 5.5 V
V
E
= 2 V
V
F
= 0.8 V
60
-40 0 40 80
Figure 9. Test circuit for tPHL and tPLH.
90% 90%
10% 10%
t
rise
t
fall
V
OH
V
OL
V
O
– OUTPUT VOLTAGE – V
0
0
I
F
– FORWARD INPUT CURRENT – mA
2.0
4.0
5.0
1.0
2.0
0.5 1.5
3.0
1.0
R
L
= 4 kΩ
R
L
= 350 Ω
R
L
= 1 kΩ
Figure 4. Typical high level output current vs.
temperature.
IF – INPUT FORWARD CURRENT – mA
1.0
0.01
VF – FORWARD VOLTAGE – V
1.5
10.0
100.0
1.2
0.1
1.41.1 1.3
1.0
TA = 85 °C TA = 40 °C
TA = 25 °C
IF
+
–
VF
Figure 6. Typical diode input forward current
characteristic.
Figure 5. Low level output current vs.
temperature.
Figure 7. Typical output voltage vs. forward
input current. Figure 8. Typical low level output voltage vs.
temperature.
11
t
r
, t
f
– RISE, FALL TIME – ns
-60
0
T
A
– TEMPERATURE – °C
100
140
160
-20
40
20 60-40 0 40 80
60
120
20
V
CC
= 5 V
I
F
= 3.5 mA
R
L
= 4 kΩ
R
L
= 1 kΩ
R
L
= 350 Ω, 1 kΩ, 4 kΩ
t
rise
t
fall
R
L
= 350 Ω
PWD – ns
-60
0
T
A
– TEMPERATURE – °C
100
50
60
-20
20
20 60-40 0 40 80
30
40
10 R
L
= 1 kΩ
R
L
= 350 Ω
V
CC
= 5 V
I
F
= 3.5 mA
R
L
= 4 kΩ
t
p
– PROPAGATION DELAY – ns
0
0
I
F
– PULSE INPUT CURRENT – mA
12
100
120
2
40
68410
60
80
20
TPLH
R
L
= 4 kΩ
V
CC
= 5 V
T
A
= 25 °C
TPLH
R
L
= 1 kΩ
TPHL
RL = 350 Ω, 1 kΩ, 4 kΩ
TPLH
R
L
= 350 Ω
t
p
– PROPAGATION DELAY – ns
-60
0
T
A
– TEMPERATURE – °C
100
100
120
-20
40
20 60-40 0 40 80
60
80
20
TPLH
R
L
= 4 k
TPLH
R
L
= 1 k
TPLH
R
L
= 350 k
TPHL
R
L
= 350 Ω, 1 kΩ, 4 kΩ
V
CC
= 5 V
I
F
= 3.5 mA
I
TH
– INPUT THRESHOLD CURRENT – mA
-60
0
T
A
– TEMPERATURE – °C
100
1.5
2.0
-20
0.5
20 60-40 0 40 80
1.0
V
CC
= 5 V
V
O
= 0.6 V
R
L
= 350 Ω
R
L
= 1 kΩ
R
L
= 4 kΩ
Figure 10. Typical input threshold current vs.
temperature.
Figure 13. Typical pulse width distortion vs.
temperature.
Figure 11. Typical propagation delay vs.
temperature. Figure 12. Typical propagation delay vs. pulse
input current.
Figure 14. Typical rise and fall time vs.
temperature.
12
V
O
0.5 V
O
V (min.)
5 V
0 V SWITCH AT A: I = 0 mA
F
SWITCH AT B: I = 3.5 mA
F
CM
V
H
CM
CM
L
O
V (max.)
CM
V (PEAK)
V
O
+5 V
7
5
6
8
2
3
4
1
CC
V
0.1 µF
BYPASS
GND
OUTPUT V
MONITORING
NODE
O
PULSE GEN.
Z = 50 Ω
O
+_
350 Ω
I
F
BA
V
FF
CM
V
HCPL-261A/261N
t
E
– ENABLE PROPAGATION DELAY – ns
-60
0
T
A
– TEMPERATURE – °C
100
90
120
-20
30
20 60-40 0 40 80
60
V
CC
= 5 V
V
EH
= 3 V
V
EL
= 0 V
I
F
= 3.5 mA
t
ELH
, R
L
= 4 kΩ
t
ELH
, R
L
= 1 kΩ
t
EHL
, R
L
= 350 Ω, 1k Ω, 4 kΩ
t
ELH
, R
L
= 350 Ω
OUTPUT V
MONITORING
NODE
O
1.5 V
t
EHL
t
ELH
V
E
INPUT
O
V
OUTPUT
3.0 V
1.5 V
+5 V
7
5
6
8
2
3
4
1
PULSE GEN.
Z = 50 Ω
t = t = 5 ns
O
f
I
FL
R
CC
V
0.1 µF
BYPASS
*C
L
*C IS APPROXIMATELY 15 pF WHICH INCLUDES
PROBE AND STRAY WIRING CAPACITANCE.
L
GND
r
3.5 mA
INPUT V
E
MONITORING NODE
HCPL-261A/261N
Figure 15. Test circuit for tEHL and tELH.
Figure 17. Test circuit for common mode transient immunity and typical
waveforms.
Figure 16. Typical enable propagation delay vs. temperature.
HCPL-261A/-261N/-061A/-061N Only.
Figure 18. Thermal derating curve, dependence of safety limiting
value with case temperature per IEC/EN/DIN EN 60747-5-2.
OUTPUT POWER – P
S
, INPUT CURRENT – I
S
0
0
T
S
– CASE TEMPERATURE – °C
20050
400
12525 75 100 150
600
800
200
100
300
500
700 P
S
(mW)
I
S
(mA)
HCPL-261A/261N OPTION 060 ONLY
175
13
Figure 20. Recommended drive circuit for HCPL-261A/-261N families for high-CMR
(similar for HCPL-263A/-263N).
Application Information
Common-Mode Rejection for
HCPL-261A/HCPL-261N Families:
Figure 20 shows the recom-
mended drive circuit for the
HCPL-261N/-261A for optimal
common-mode rejection
performance. Two main points to
note are:
1. The enable pin is tied to VCC
rather than floating (this
applies to single-channel parts
only).
2. Two LED-current setting
resistors are used instead of
one. This is to balance ILED
variation during common-mode
transients.
If the enable pin is left floating, it
is possible for common-mode
transients to couple to the enable
pin, resulting in common-mode
failure. This failure mechanism
only occurs when the LED is on
and the output is in the Low
State. It is identified as occurring
when the transient output voltage
rises above 0.8 V. Therefore, the
enable pin should be connected to
either VCC or logic-level high for
best common-mode performance
with the output low (CMRL). This
failure mechanism is only present
in single-channel parts (HCPL-
261N, -261A, -061N, -061A) which
have the enable function.
Also, common-mode transients
can capacitively couple from the
LED anode (or cathode) to the
output-side ground causing
current to be shunted away from
the LED (which can be bad if the
LED is on) or conversely cause
current to be injected into the
LED (bad if the LED is meant to
be off). Figure 21 shows the
parasitic capacitances which
exists between LED
anode/cathode and output ground
(CLA and CLC). Also shown in
Figure 21 on the input side is an
AC-equivalent circuit.
*Higher CMR may be obtainable by connecting pins 1, 4 to input ground (Gnd1).
ENABLE
(IF USED)
GND BUS (BACK)
V BUS (FRONT)
CC
N.C.
N.C.
N.C.
N.C.
OUTPUT 1
OUTPUT 2
ENABLE
(IF USED)
0.1µF
0.1µF
10 mm MAX. (SEE NOTE 16)
SINGLE CHANNEL PRODUCTS
0.01 µF
350 Ω
74LS04
OR ANY TOTEM-POLE
OUTPUT LOGIC GATE
VO
VCC+
8
7
6
1
3
SHIELD 5
2
4
HCPL-261A/261N
GND
GND2
357 Ω
(MAX.)
VCC
357 Ω
(MAX.)
*
*
GND1
Figure 19. Recommended printed circuit board layout.
GND BUS (BACK)
V BUS (FRONT)
CC
OUTPUT 1
OUTPUT 2
0.1µF
10 mm MAX. (SEE NOTE 16)
DUAL CHANNEL PRODUCTS
14
Figure 22. TTL interface circuit for the HCPL-261A/-261N families.
420 Ω
(MAX) 1
3
2
4
2N3906
(ANY PNP)
V
CC
74L504
(ANY
TTL/CMOS
GATE)
HCPL-261X
LED
Table 1 indicates the directions of
ILP and ILN flow depending on the
direction of the common-mode
transient.
For transients occurring when the
LED is on, common-mode rejec-
tion (CMRL, since the output is in
the “low” state) depends upon the
amount of LED current drive (IF).
For conditions where IF is close to
the switching threshold (ITH),
CMRL also depends on the extent
which ILP and ILN balance each
other. In other words, any
condition where common-mode
transients cause a momentary
decrease in IF (i.e. when
dVCM/dt>0 and |IFP| > |IFN|,
referring to Table 1) will cause
common-mode failure for
transients which are fast enough.
Likewise for common-mode
transients which occur when the
LED is off (i.e. CMRH, since the
output is “high”), if an imbalance
between ILP and ILN results in a
transient IF equal to or greater
than the switching threshold of
the optocoupler, the transient
“signal” may cause the output to
spike below 2 V (which consti-
tutes a CMRH failure).
By using the recommended circuit
in Figure 20, good CMR can be
achieved. (In the case of the -261N
families, a minimum CMR of 15
kV/µs is guaranteed using this
circuit.) The balanced ILED-setting
resistors help equalize ILP and ILN
to reduce the amount by which
ILED is modulated from transient
coupling through CLA and CLC.
CMR with Other Drive Circuits
CMR performance with drive
circuits other than that shown in
Figure 20 may be enhanced by
following these guidelines:
1. Use of drive circuits where
current is shunted from the
LED in the LED “off” state (as
shown in Figures 22 and 23).
This is beneficial for good
CMRH.
2. Use of IFH > 3.5 mA. This is
good for high CMRL.
Using any one of the drive circuits
in Figures 22-24 with IF= 10 mA
will result in a typical CMR of 8
kV/µs for the HCPL-261N family,
as long as the PC board layout
practices are followed. Figure 22
shows a circuit which can be used
with any totem-pole-output TTL/
LSTTL/HCMOS logic gate. The
buffer PNP transistor allows the
circuit to be used with logic
devices which have low current-
sinking capability. It also helps
maintain the driving-gate power-
supply current at a constant level
to minimize ground shifting for
other devices connected to the
input-supply ground.
When using an open-collector TTL
or open-drain CMOS logic gate, the
circuit in Figure 23 may be used.
When using a CMOS gate to drive
the optocoupler, the circuit shown
in Figure 24 may be used. The
diode in parallel with the RLED
speeds the turn-off of the
optocoupler LED.
Figure 21. AC equivalent circuit for HCPL-261X.
350 Ω
1/2 R
LED
V
CC
+
15 pF
+V
CM
8
7
6
1
3
SHIELD 5
2
4
C
LA
V
O
GND
0.01 µF
1/2 R
LED
C
LC
I
LN
I
LP
–
15
Figure 24. CMOS gate drive circuit for HCPL-261A/-261N families.Figure 23. TTL open-collector/open drain gate drive circuit for
HCPL-261A/-261N families.
820 Ω1
3
2
4
VCC
74HC00
(OR ANY
OPEN-COLLECTOR/
OPEN-DRAIN
LOGIC GATE)
HCPL-261X
LED
750 Ω
1
3
2
4
VCC
74HC04
(OR ANY
TOTEM-POLE
OUTPUT LOGIC
GATE)
HCPL-261A/261N
1N4148
LED
Propagation Delay, Pulse-Width
Distortion and Propagation Delay Skew
Propagation delay is a figure of
merit which describes how quickly
a logic signal propagates through a
system. The propagation delay
from low to high (tPLH) is the
amount of time required for an
input signal to propagate to the
output, causing the output to
change from low to high. Similarly,
the propagation delay from high to
low (tPHL) is the amount of time
required for the input signal to
propagate to the output, causing
the output to change from high to
low (see Figure 9).
Pulse-width distortion (PWD)
results when tPLH and tPHL differ in
value. PWD is defined as the
difference between tPLH and tPHL
and often determines the
maximum data rate capability of a
transmission system. PWD can be
expressed in percent by dividing
the PWD (in ns) by the minimum
pulse width (in ns) being
transmitted. Typically, PWD on
the order of 20-30% of the
minimum pulse width is tolerable;
the exact figure depends on the
particular application (RS232,
RS422, T-1, etc.).
Propagation delay skew, tPSK, is
an important parameter to con-
sider in parallel data applications
where synchronization of signals
on parallel data lines is a concern.
If the parallel data is being sent
through a group of optocouplers,
differences in propagation delays
will cause the data to arrive at the
outputs of the optocouplers at
different times. If this difference
in propagation delay is large
enough it will determine the
maximum rate at which parallel
data can be sent through the
optocouplers.
Propagation delay skew is defined
as the difference between the
minimum and maximum propaga-
tion delays, either tPLH or tPHL, for
any given group of optocouplers
which are operating under the
same conditions (i.e., the same
drive current, supply voltage,
output load, and operating
temperature). As illustrated in
Figure 25, if the inputs of a group
of optocouplers are switched
either ON or OFF at the same
time, tPSK is the difference
between the shortest propagation
delay, either tPLH or tPHL, and the
longest propagation delay, either
tPLH or tPHL.
As mentioned earlier, tPSK can
determine the maximum parallel
data transmission rate. Figure 26
is the timing diagram of a typical
parallel data application with
both the clock and the data lines
being sent through optocouplers.
Table 1. Effects of Common Mode Pulse Direction on Transient ILED If |ILP| < |ILN|, If |ILP| > |ILN|,
LED IF Current LED IF Current
If dVCM/dt Is: then ILP Flows: and ILN Flows: Is Momentarily: Is Momentarily:
positive (>0) away from LED away from LED increased decreased
anode through CLA cathode through CLC
negative (<0) toward LED toward LED decreased increased
anode through CLA cathode through CLC
Figure 25. Illustration of propagation delay skew – tPSK.
50%
1.5 V
IF
VO
50%IF
VO
tPSK
1.5 V
TPHL
TPLH
Figure 26. Parallel data transmission example.
DATA
t
PSK
INPUTS
CLOCK
DATA
OUTPUTS
CLOCK
t
PSK
The figure shows data and clock
signals at the inputs and outputs
of the optocouplers. To obtain the
maximum data transmission rate,
both edges of the clock signal are
being used to clock the data; if
only one edge were used, the clock
signal would need to be twice as
fast.
Propagation delay skew repre-
sents the uncertainty of where an
edge might be after being sent
through an optocoupler. Figure 26
shows that there will be
uncertainty in both the data and
the clock lines. It is important that
these two areas of uncertainty not
overlap, otherwise the clock signal
might arrive before all of the data
outputs have settled, or some of
the data outputs may start to
change before the clock signal has
arrived. From these considera-
tions, the absolute minimum pulse
width that can be sent through
optocouplers in a parallel
application is twice tPSK. A
cautious design should use a
slightly longer pulse width to
ensure that any additional
uncertainty in the rest of the
circuit does not cause a problem.
The tPSK specified optocouplers
offer the advantages of guaran-
teed specifications for propaga-
tion delays, pulse-width
distortion, and propagation delay
skew over the recommended
temperature, input current, and
power supply ranges.
For product information and a complete list of distributors, please go to our website: www.avagotech.com
Avago, Avago Technologies, and the A logo are trademarks of Avago Technologies, Pte. in the United States and other countries.
Data subject to change. Copyright © 2006 Avago Technologies Pte. All rights reserved. Obsoletes 5989-0780EN
5989-2129EN March 7, 2006
