TSH70CD Equivalent & Substitute Parts

Part Overview

The STMicroelectronics TSH70CD is a general-purpose operational amplifier integrated circuit in 8-SOIC surface mount packaging. This device features rail-to-rail output capability and is designed for linear amplification applications requiring single-circuit configurations. The TSH70CD is classified as obsolete, necessitating identification of active equivalent and substitute components for new designs and production continuity. Substitute parts must maintain compatibility across electrical performance parameters, mechanical packaging, and supply voltage specifications while meeting current product availability and compliance requirements.

Key Parameters

Parameter	Value	Unit
Amplifier Type	General Purpose	—
Number of Circuits	1	—
Output Type	Rail-to-Rail	—
Package / Case	8-SOIC (0.154", 3.90mm Width)	—
Mounting Type	Surface Mount	—
Voltage - Supply Span (Min)	3	V
Voltage - Supply Span (Max)	12	V
Slew Rate	118	V/µs
Gain Bandwidth Product	65	MHz
-3dB Bandwidth	100	MHz
Current - Input Bias	6	µA
Voltage - Input Offset	800	µV
Current - Supply	9.8	mA
Current - Output / Channel	55	mA
Operating Temperature	0 to 70	°C
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the TSH70CD are selected based on strict electrical and mechanical compatibility criteria. All substitute candidates must satisfy the following requirements:

Mandatory Compatibility Parameters:

Package / Case: 8-SOIC (0.154", 3.90mm Width)
Mounting Type: Surface Mount
Output Type: Rail-to-Rail
Number of Circuits: 1
Voltage - Supply Span (Min): 3 V or lower
Voltage - Supply Span (Max): 12 V or higher
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level (MSL): 1 (Unlimited)

Performance Parameters for Substitution: Substitute parts must maintain or exceed the TSH70CD electrical specifications in the following areas: slew rate, bandwidth, input bias current, input offset voltage, supply current, and output current capability. All substitute parts listed are active products with current manufacturing status, ensuring long-term availability and supply chain continuity.

Parameter Comparison

Parameter	TSH70CD	AD8051ARZ	AD8051ARZ-REEL	AD8051ARZ-REEL7	AD8091ARZ	AD8091ARZ-REEL7	LMH6642MA/NOPB	LMH6642MAX/NOPB
Manufacturer	STMicroelectronics	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.	Texas Instruments	Texas Instruments
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active
Package / Case	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Output Type	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail
Number of Circuits	1	1	1	1	1	1	1	1
Slew Rate (V/µs)	118	170	170	170	170	170	135	135
-3dB Bandwidth (MHz)	100	110	110	110	110	110	130	130
Current - Input Bias (µA)	6	1.4	1.4	1.4	1.4	1.4	1.6	1.6
Voltage - Input Offset (mV)	0.8	1.8	1.8	1.8	1.8	1.8	1	1
Current - Supply (mA)	9.8	4.8	4.8	4.8	4.8	4.8	2.7	2.7
Current - Output / Channel (mA)	55	45	45	45	45	45	75	75
Voltage - Supply Span (Min) (V)	3	3	3	3	3	3	2.7	2.7
Voltage - Supply Span (Max) (V)	12	12	12	12	12	12	12.8	12.8
Operating Temperature (°C)	0 to 70	-40 to 125	-40 to 125	-40 to 125	-40 to 85	-40 to 85	-40 to 85	-40 to 85
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

All listed substitute parts are active products with ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity ratings, ensuring compatibility with modern manufacturing processes and long-term supply availability.

Analog Devices AD8051 Series (AD8051ARZ, AD8051ARZ-REEL, AD8051ARZ-REEL7): These parts provide improved electrical performance over the TSH70CD with higher slew rate (170 V/µs versus 118 V/µs), lower input bias current (1.4 µA versus 6 µA), and extended operating temperature range (-40°C to 125°C). The AD8051ARZ-REEL7 variant offers the highest inventory availability (7104 units) with Cut Tape and Digi-Reel packaging.

Analog Devices AD8091 Series (AD8091ARZ, AD8091ARZ-REEL7): These parts deliver equivalent performance to the AD8051 series with identical electrical specifications but operate within a narrower temperature range (-40°C to 85°C). The AD8091ARZ-REEL7 variant provides exceptional inventory depth (90100 units) in Cut Tape and Digi-Reel packaging.

Texas Instruments LMH6642 Series (LMH6642MA/NOPB, LMH6642MAX/NOPB): These parts offer the highest bandwidth performance (130 MHz versus 100 MHz) and lowest supply current (2.7 mA versus 9.8 mA), with superior output current capability (75 mA versus 55 mA). The LMH6642MAX/NOPB variant provides the largest inventory (25800 units) in Cut Tape and Digi-Reel packaging. Supply voltage range extends to 2.7 V minimum, providing broader application flexibility.

All substitute parts maintain identical 8-SOIC package geometry and surface mount mounting type, enabling direct PCB layout compatibility without redesign.

Frequently Asked Questions (FAQ)

Q: Can the AD8051ARZ directly replace the TSH70CD without circuit modifications?

A: The AD8051ARZ maintains identical package geometry (8-SOIC), mounting type (surface mount), output type (rail-to-rail), and supply voltage range (3 V to 12 V). Pin-for-pin compatibility is established. However, the improved electrical performance characteristics (higher slew rate, lower input bias current, lower input offset voltage) may require verification in applications with tight noise or bandwidth specifications.

Q: What is the difference between AD8051ARZ, AD8051ARZ-REEL, and AD8051ARZ-REEL7?

A: These three part numbers represent identical electrical devices with different packaging and delivery formats. AD8051ARZ is supplied in Tube packaging. AD8051ARZ-REEL is supplied in Tape & Reel (TR) format. AD8051ARZ-REEL7 is supplied in Cut Tape (CT) and Digi-Reel format. Selection depends on manufacturing process requirements and inventory management preferences.

Q: Why do the LMH6642 parts have lower supply current than the TSH70CD?

A: The LMH6642MA/NOPB and LMH6642MAX/NOPB devices are specified with 2.7 mA supply current compared to the TSH70CD at 9.8 mA. This represents improved power efficiency in the design. Both devices maintain identical output current capability (75 mA for LMH6642 versus 55 mA for TSH70CD) and rail-to-rail output performance.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts carry ROHS3 Compliant certification and MSL 1 (Unlimited) moisture sensitivity rating, meeting current environmental and manufacturing compliance requirements.

Q: Which substitute part offers the widest operating temperature range?

A: The AD8051ARZ, AD8051ARZ-REEL, and AD8051ARZ-REEL7 variants operate across -40°C to 125°C, providing the widest temperature specification. The TSH70CD operates from 0°C to 70°C. The AD8091 series and LMH6642 series operate from -40°C to 85°C.

Q: Can I use the LMH6642MAX/NOPB in applications requiring 3 V minimum supply voltage?

A: The LMH6642MAX/NOPB is specified with a minimum supply voltage of 2.7 V, which is lower than the TSH70CD minimum of 3 V. This part is suitable for applications requiring operation at 2.7 V. For applications strictly requiring 3 V minimum operation, the AD8051 or AD8091 series parts are specified at exactly 3 V minimum.

Q: What inventory levels are available for each substitute part?

A: AD8051ARZ-REEL7 provides 7104 units. AD8091ARZ-REEL7 provides 90100 units (highest availability). LMH6642MAX/NOPB provides 25800 units. AD8051ARZ provides 2505 units. AD8051ARZ-REEL provides 4391 units. AD8091ARZ provides 2223 units. LMH6642MA/NOPB provides 1103 units.

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