ISOCOM LTD: BSI9000 and CECC20000 Approved Manufacturer

Hutton Close, Crowther Ind Est, Washington, Tyne & Wear NE38 0AH, England
Email: enquiry@isocomoptocouplers.com - Tel: +44 (0)191 4166546 - Fax: +44 (0)191 4155055

CD750
Dual Channel Low Input Current High Gain Hermetically Sealed Ceramic Optocoupler

Circuit and Package
Features
Description
Absolute Maximum Ratings
Recommended Operating Conditions
Electrical Characteristics
Typical Characteristics
Graphs
Reliability and Approvals

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Circuit and Package

Features

Hermetically Sealed 8 Pin Ceramic Dual-in-Line Package
Low Input Current Requirement: 0.5mA
High Current Transfer Ratio: 1000% Typical
Low Power Consumption
Performance Guaranteed Over -55°C to +125°C Ambient Temperature Range
1500 Vdc Withstand Test Voltage

Description

The CD750 consists of two IR light emitting diodes, each optically coupled to a corresponding integrated high gain photon detector. The high gain output stage features an open collector output providing both lower output saturation voltage and higher speed of operation than possible with a conventional photodarlington type coupler. The minimum CTR of 200% at an input current of 0.5mA makes it ideal for use in low input current applications such as MOS, CMOS and low power logic interfacing or data transmission systems. Surface Mount Option Available.

Applications

Military, high reliability system, telephone ring detection, microprocessor system interface, level shifting, digital logic ground isolation, current loop receiver, isolation input line receiver, system test equipment isolation, process control input/output isolation

Absolute Maximum Ratings

Storage Temperature:
Operating Temperature:
Lead Soldering:		 -65°C to +150°C
-55°C to +125°C
260°C for 10s

Input Diode (each channel)

Peak Forward Current IF:
Reverse Voltage VR:		 8mA (duration<=1ms, 500pps)
5V

Output Detector (each channel)

Supply Voltage VCC:
Current IO:
Voltage VO:
Collector Power Dissipation:		 -0.5V to 20V (1)
40mA
-0.5Vto 20V (1)
50mW (2)

Recommended Operating Conditions

PARAMETER SYMBOL MIN MAX UNIT
Input Voltage, Low Level (each channel) VFL
0.7 V
Input Current, High Level (each channel) IFH 0.5 5 mA
Supply Voltage, Output VCC 2.0 18 V

Electrical Characteristics

(Over recommended temperature Ta= -55°C to +125°C u.o.s.; all typical values Vcc=5V, Ta=25°C each channel))

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNIT NOTES
IOH, OHX High Level Output Current VO=VCC=18V, VF=0.7V (channel under test), IF=8mA (other channel)
0.001 250 µA 3, 5, 6
VOL Lower Level Output Voltage VCC=4.5V, IF=0.5mA, IOL=1.0mA
0.1 0.4 V 3
VCC=4.5V, IF=1.6mA, IOL=3.2mA 0.13 V
VCC=4.5V, IF=5mA, IOL=10mA 0.15 V
ICCH High Level Supply Current VCC=18V, IF1=IF2=0
0.01 15 µA
ICCL Low Level Supply Current VCC=18V, IF1=IF2=1.6mA
1.4 4 mA
II-O Input-Output Insulation Leakage Current RH=45%, TA=25°C, t=5s, VIO=1500Vdc

1.0 µA 6, 12
VF Input Forward Voltage IF=1.6mA, TA=25°C 1.0 1.45 1.6 V 3
BVR Input Reverse Breakdown Voltage IR=10µA, TA=25°C 5

V
tPLH Propagation Delay Time to Logic High Output RL=4.7kohm, VCC=5V, IF=0.5mA
21 185 µs
RL=2.2kohm, VCC=5V, IF=1.6mA 18 115 µs
RL=680ohm, VCC=5V, IF=5mA 17 60 µs
tPHL Propagation Delay Time to Logic Low Output RL=4.7kohm, VCC=5V, IF=0.5mA
37 185 µs
RL=2.2kohm, VCC=5V, IF=1.6mA 6 30 µs
RL=680ohm, VCC=5V, IF=5mA 3 12 µs
CTR Current Transfer Ratio IF=0.5mA, VO=0.4V, VCC=4.5V 200 700
% 3, 4
IF=1.6mA, ... 1000 %
IF=5mA, ... 600 %
CMH Common Mode Transient Immunity at Logic High Output Level IF=0mA, VCC=5V, TA=25°C, VCM=50Vp-p, RL=1.5kohm 500 1000
V/µs 3, 9, 11
CML Common Mode Transient Immunity at Logic Low Output Level IF=1.6mA, ... -500 -1000 V/µs 3, 10, 11

Typical Characteristics

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNIT NOTES
RIO Resistance VIO=500Vdc
1E12
ohm 6
CIO Capacitance f=1MHz 1.5 pF 7
CIN Input Capacitance VF=0, f=1MHz 60 pF 3
dVF/dTA Temperature Coefficient of Forward Voltage IF=1.6mA -1.5 mV/°C
II-I Input-Input Insulation Leakage Current RH=45%, VII=500Vdc, t=5s 0.6 nA 8
RI-I Resistance VII=500Vdc 1E12 ohm
CI-I Capacitance f=1MHz 1 pF

Notes

1. Pin 5 should be the most negative voltage at the detector side. Keeping Vcc as low as possible, but greater than 2.0V, will provide lowest total Ioh over temperature.
2. Output Power is collector output plus one half of total supply power.
3. Each channel.
4. Current Transfer Ratio is defined as the ratio of output collector current Io to the forward LED input current If, times 100%.
5. Iohx is the leakage current resulting from channel to channel optical crosstalk. Vf=0.7V for channel under test.
6. Pins 1 through 4 shorted together and pins 5 through 8 shorted together.
7. Measured between LED anode and cathode shorted together and pins 5 through 8 shorted together.
8. Measured between adjacent input pairs shorted together (ie. pins 1 and 2 shorted together, and pins 3 and 4 shorted together, etc.)
9. CMh is the maximum tolerable common mode transient to assure that the output will remain in a high logic state (ie. Vo > 2.0V)
10. CMl is the maximum tolerable common mode transient to assure that the output will remain in a low logic state (ie. Vo < 0.8V)
11. In applications where dV/dt may exceed 50000V/µs (such as static a discharge), a series resistor Rcc should be included to protect the detector ICs from destructively high surge currents. The recommended value is
Rcc=(1 V) / (0.6 If mA) kohm.
12. This is a momentary withstand test, not an operation condition.

Graphs

Reliability and Approvals

Isocom Ltd supplies high reliability devices for applications requiring an operating temperature range of -55°C to +125°C (e.g. military applications).
Devices supplied have completed rigorous testing, and various high reliability test options are offered. The Company is developing a suitable specification to permit release to CECC 20000.
As a manufacturer of high reliability optocouplers Isocom Ltd's manufacturing plant in North East England, has site approval to BS9000 (registered number 1294/M) issued by the British Standards Institution. Together with CECC, BS9000 is a preferred standard for use in European military projects. Consequently, Isocom Ltd's approved devices are listed in the CECC "MUAHAG" preferred products list.
The BS9000 approval is also recognised as meeting the equivalent criteria to those required by BS5750/ISO9000/EN29000.
The Company's customers can be assured of our commitment to stringent quality, reliability and inspection standards, as demonstrated by our existing approvals. Other customer-specific options can also be offered.

Isocom takes great effort to ensure accurate data, but regrettably cannot be held liable for any error on its website. Visit File Lists to confirm old printouts are up-to-date.

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