4142B

Keysight Technologies (Agilent HP)DC Sources

The Keysight (Agilent/HP) 4142B is a highly flexible, modular DC source/monitor mainframe designed for high-speed, high-precision semiconductor parametric test and characterization. Featuring an 8-slot expandable architecture, it accommodates a variety of plug-in measurement modules—such as Source/Monitor Units (SMUs), High Voltage Source Units (HVSUs), High Current Source Units (HCSUs), and Voltage Source/Monitor Units (VS/VMUs)—to support specialized test requirements in both lab and automated production environments.

Automated Test Equipment Semiconductor Testing Source Measure Unit

Specifications

General

Parameter	Value
Interfaces	GPIB (HP-IB)
Display	None (status LED indicators only)
Warm-Up Time	40 minutes

Physical

Parameter	Value
Operating Temperature	5 °C to 40 °C
Dimensions (W×H×D)	426 mm × 235 mm × 512 mm
Weight	15 kg

Mainframe Architecture & Capacity

Parameter	Value
Total Number of Module Slots	8
Maximum Number of SMU Channels	8 (using 1-slot modules)
Built-in Ground Unit (GNDU)	Yes
GNDU Maximum Sink Current	1.6 A
GNDU Connection Terminal	Triaxial
Internal Command Language	FLEX Command Set
Internal Measurement Buffer	4096 readings
Backplane Synchronization	Built-in real-time synchronization between plug-in modules

Sourcing & Measurement Capabilities

Parameter	Value
Minimum Current Measurement Resolution	20 fA
Minimum Voltage Measurement Resolution	4 µV
Maximum Sourcing Voltage	±1000 V (with HP 41423A)
Maximum Sourcing Current	±10 A (with HP 41422A)
Voltage Measurement Accuracy	0.05%
Current Measurement Accuracy	0.2%
Spot Measurement Speed	4 ms (typical for Vth or hfe measurements)
Sourcing Modes	DC, Pulsed
Sweep Types	Linear, logarithmic, dual-channel staircase
Measurement Modes	Spot, staircase sweep, pulsed spot, pulsed sweep, analog search

HP 41420A High Power SMU

Parameter	Value
HPSU Slot Width	2 slots
HPSU Maximum Voltage	±200 V
HPSU Maximum Current	±1 A (at ≤ 20 V)
HPSU Maximum DC Sourcing Power	20 W
HPSU Sourcing Voltage Ranges	2 V, 20 V, 40 V, 100 V, 200 V
HPSU Sourcing Current Ranges	10 nA, 100 nA, 1 µA, 10 µA, 100 µA, 1 mA, 10 mA, 100 mA, 1 A
HPSU Minimum Voltage Sourcing Resolution	40 µV
HPSU Minimum Current Sourcing Resolution	200 fA

HP 41421B Medium Power SMU

Parameter	Value
MPSU Slot Width	1 slot
MPSU Maximum Voltage	±100 V
MPSU Maximum Current	±100 mA
MPSU Maximum DC Sourcing Power	2 W
MPSU Sourcing Voltage Ranges	2 V, 20 V, 40 V, 100 V
MPSU Sourcing Current Ranges	10 nA, 100 nA, 1 µA, 10 µA, 100 µA, 1 mA, 10 mA, 100 mA
MPSU Minimum Voltage Sourcing Resolution	40 µV
MPSU Minimum Current Sourcing Resolution	200 fA

HP 41422A High Voltage Source Unit

Parameter	Value
HVSU Slot Width	2 slots
HVSU Maximum Voltage	±1000 V
HVSU Maximum Current	±10 mA (at ±1000 V), ±20 mA (at ±500 V)
HVSU Sourcing Voltage Ranges	200 V, 1000 V

HP 41424A VS/VM Unit

Parameter	Value
VS/VMU Slot Width	1 slot
VS Sourcing Channels	2 channels
VM Monitoring Channels	2 channels
VS Channel Output Range	±20 V
VS Channel Max Current Output	±100 mA
VM Channel Max Input Voltage	±20 V

HP 41425A High Current Source Unit

Parameter	Value
HCSU Slot Width	2 slots
HCSU Maximum Peak Current	±20 A (pulsed)
HCSU Maximum Sourcing Voltage	±40 V (at ≤ 1 A DC)
HCSU Current Ranges	100 mA, 1 A, 10 A (pulsed), 20 A (pulsed)

Pulsed Sourcing & Measurement

Parameter	Value
HPSU/MPSU Pulse Width Range	1 ms to 50 ms (in 100 µs steps)
HCSU Pulse Width Range	100 µs to 1 ms

Triggering & Synchronization

Parameter	Value
External Trigger Input Connector	BNC female
External Trigger Output Connector	BNC female

Guarding & Shielding

Parameter	Value
Safety Interlock Terminal	Yes (rear panel, 3-pin connector)
Interlock Voltage Threshold	High voltage output (at >40 V) is disabled unless interlock loop is closed

Physical Characteristics

Parameter	Value
Cooling Configuration	Forced-air cooling (internal rear-mounted fan)

Power Requirements

Parameter	Value
Line Voltage	100 V / 120 V / 220 V / 240 V (±10%, selectable)
Line Frequency Range	47 Hz to 66 Hz
Maximum Power Consumption	750 VA

Memory & Buffer

Parameter	Value
Command Program Memory Capacity	2000 lines

Measurement Performance

Parameter	Value
Integration Time Settings	Short, Medium (1 PLC), Long (16 PLC)

Connectivity

Parameter	Value
HP-IB Interface Capabilities	SH1, AH1, T6, L4, SR1, RL1, PP0, DC1, DT1, C0

VS/VMU Module Specifications

Parameter	Value
VM Channel Voltage Ranges	2 V, 20 V
VM Channel Minimum Voltage Resolution	100 µV
VS Channel Voltage Ranges	20 V, 40 V
VS Channel Minimum Voltage Sourcing Resolution	1 mV

MPSU Module Specifications

Parameter	Value
MPSU Current Measurement Ranges	1 nA, 10 nA, 100 nA, 1 µA, 10 µA, 100 µA, 1 mA, 10 mA, 100 mA
MPSU Voltage Measurement Ranges	2 V, 20 V, 40 V, 100 V

HPSU Module Specifications

Parameter	Value
HPSU Voltage Measurement Ranges	2 V, 20 V, 40 V, 200 V
HPSU Current Measurement Ranges	1 nA, 10 nA, 100 nA, 1 µA, 10 µA, 100 µA, 1 mA, 10 mA, 100 mA, 1 A

Triggering

Parameter	Value
External Trigger Input Signal Type	TTL level, active low or active high
External Trigger Output Signal Type	TTL level, active low or active high pulse

Interfaces

Parameter	Value
HP-IB Subset Compatibility	SH1, AH1, T6, L4, SR1, RL1, PP0, DC1, DT1, C0, E1

Compliance & Safety

Parameter	Value
Safety Standards	CSA C22.2 No. 1010.1, EN 61010-1
EMC Standards	CISPR 11: Group 1, Class A; EN 55011: Group 1, Class A

Accessories

Parameter	Value
Compatible Test Fixtures	HP 16087A, HP 16088A

Technology

Semiconductor Parametric Analyzer / Source Measure Unit (SMU) Mainframe

Applications

Semiconductor device characterization, parametric testing, wafer-level testing, and high-speed DC/pulsed measurements