HP 16440A SMU/Pulse Generator Selector for HP 4155B / 4156B (Pre-Owned)Key Features At A Glance Four built-in Medium Power SMUs (10 fA / 2 µV to 100 mA / 100 V) for simultaneous source-and-measure on multiple device terminals Voltage compliance to ±100 V and current compliance from ±1 pA to ±100 mA per SMU to protect the device under test Two Voltage Source Units (±20 V, 100 mA) and two Voltage Monitor Units (±20 V, 1 GΩ input impedance) integrated alongside the SMUs Built-in HP Instrument BASIC, HP-IB, parallel printer, and 10BASE-T LAN interfaces for automated test and remote control Sweep, sampling (time-domain), pulsed, and stress-force measurement modes with up to 1001 VAR1 sweep steps and 10,001 sampling points 8.4-inch color active-matrix LCD with graphics analysis (markers, cursors, regression lines) and built-in 3.5-inch floppy drive for setups and data HP 4145B setup, data, and command-set compatibility for migrating existing programs and procedures Optional HP 41501B expander adds HPSMU (±200 V / ±1 A) or additional MPSMUs plus up to two Pulse Generator Units The HP 4155B Semiconductor Parameter Analyzer is a bench-top instrument for DC parametric characterization of semiconductor devices. The mainframe integrates four Medium Power Source Monitor Units (MPSMUs), two Voltage Source Units (VSUs), and two Voltage Monitor Units (VMUs) behind an 8.4-inch color LCD and a built-in HP Instrument BASIC environment, so the engineer can define stimulus, measurement, and analysis from a single front panel.The 4155B is designed to set measurement and stress conditions, control execution, perform arithmetic calculations on results, display measured and calculated data on the LCD, and perform graphical analysis. Predefined library setups for Vce-Ic, Vds-Id, Vgs-Id, and Vf-If curves give immediate access to the most common transistor and diode characterizations, while user-defined setups can be stored on the built-in 3.5-inch disk or recalled over LAN.ValueTronics International has supplied test and measurement instruments since 1992 from our 20,000-square-foot facility at 1675 Cambridge Drive in Elgin, Illinois. Semiconductor parameter analyzers like the 4155B are inspected, powered up, and functionally verified by our technicians on site before shipment, and we hold the supporting documentation, accessories, and triaxial cable sets needed to keep the instrument productive when it reaches your bench. Working with a stocking specialist rather than a drop-shipper means the unit you order has been seen by a person who can answer questions about its condition before the box leaves the warehouse.Brand HeritageHewlett-Packard's test and measurement business was spun out as Agilent Technologies in 1999, and the electronic measurement portion of Agilent was subsequently transferred to Keysight Technologies in 2014. Instruments originally branded HP — including the 4155B and 4156B parameter analyzer family — therefore trace their support and calibration heritage through Agilent to today's Keysight organization.Compare Other Models in This SeriesThe HP 4155B and HP 4156B share a common mainframe, the same 8.4-inch color LCD, the same HP Instrument BASIC environment, the same sweep / sampling / stress measurement architecture, and the same HP 41501B expansion path. They differ in the source-monitor unit installed: the 4155B ships with four Medium Power SMUs (MPSMUs), while the 4156B ships with four High Resolution SMUs (HRSMUs).Both models include two Voltage Source Units and two Voltage Monitor Units, both support optional addition of an HPSMU (±200 V / ±1 A) or two more MPSMUs through the 41501B expander, and both can drive up to two Pulse Generator Units. The choice between the 4155B and 4156B therefore comes down to the resolution and low-current floor required by the application.Each pre-owned model in this family is listed on its own product page with condition-matched pricing and accessory detail. Selecting the right configuration starts with the SMU type required for the measurement, then the optional 41501B expander, HPSMU, and PGU complement.The 4155B's MPSMU has a minimum current resolution of 100 fA on the ±1 nA range and a minimum voltage resolution of 2 µV on the ±2 V range, which is sufficient for the large majority of digital-logic, power-device, and process-monitoring measurements. For sub-picoamp leakage characterization, gate-oxide work, or measurements that require an offset-cancellation specification at the 1 fA level, the HRSMU-equipped 4156B is the appropriate selection within the same family.The MPSMU in the 4155B covers ±1 nA to ±100 mA in eight current ranges with a 100 fA minimum resolution and uses single-triaxial, non-Kelvin connection. The HRSMU in the 4156B extends two ranges lower, down to ±10 pA, with a 1 fA minimum resolution and dual-triaxial Kelvin (remote-sensing) connection. Voltage ranges (±2 V, ±20 V, ±40 V, ±100 V), maximum current per voltage quadrant, and compliance behavior are otherwise equivalent between the two SMU types.The comparison table below summarizes the source and measurement floors, connection type, and standard configuration for each model so the appropriate analyzer can be matched to the device's bias and leakage characteristics. Model Type SMU Configuration Voltage Resolution 16440A SMU/Pulse Generator Selector 2 channels (CH1 with PGU OPEN relay, CH2) — 4155B Semiconductor Parameter Analyzer 4x MPSMU, 2x VMU, 2x VSU 100 µV (MPSMU, 2V range) 4156B Precision Semiconductor Parameter Analyzer 4x HRSMU, 2x VMU, 2x VSU 2 µV (HRSMU, 2V range) 41501B SMU/Pulse Generator Expander Optional HPSMU or 2x MPSMU, plus optional 2x PGU 100 µV (HPSMU, 2V range) Additional differences in specifications beyond the few shown above are not listed here — see each model's full specifications below.Product Core & Specifications Parameter Specification Channel Configuration Channels Two channels (CH1, CH2) CH1 INPUT ports: 2 (SMU and PGU, PGU port has additional series semiconductor relay); OUTPUT port: 1 CH2 INPUT ports: 2 (SMU and PGU); OUTPUT port: 1 Voltage & Current Range SMU Input Port Max V: 200V; Max I: 1.0A PGU Input Port Max V: 40V; Max I: 0.2A (AC peak) Supplemental Information (at 23°C ±5°C, 50% RH) SMU Port Leakage Current
