Hewitt Packard 545A TTL and CMOS Logic Probe With Pulse Memory

These have been Fully Checked and are in Excellent Condition

The HP 545A is a Logic Probe that provides an effective solution for digital troubleshooting problems.
The hand-held 545A Logic Probe is light, rugged, overload protected, and very fast; 80 MHz in TTL,
40 MHz in CMOS. Operates from 3 to 18 V in CMOS applications and from 4.5 to 15 VDC
in the TTL mode while maintaining standard TTL,

Features a TTL / CMOS switch and a Pulse Memory Button

HP 545A Probe Specifications

Input current: < 15 μA (source or sink).
Input capacitance: < 15 pF.

Logic thresholds *TTL: Logic one 2.0 + 0.4, -0.2 V. Logic zero 0.8 + 0.2, -0.4 V.

CMOS: 3-10 Vdc supply

Logic one: 0.7 X Vsupply ±0.5 Vdc.

Logic zero: 0.3 X V , ±0.5 Vdc.

CMOS: >10-18 Vdc supply.

Logic one: 0.7 X Vsupply ±1.0 Vdc.

Logic zero: 0.3 X Vsupp]y ±1.0 Vdc.

Input minimum pulse width: 10 ns using ground lead (typically 20 ns without ground lead).

Input maximum pulse repetition frequency:

TTL, 80 MHz. CMOS, 40 MHz.

Input overload protection: ±120 V continuous (dc to 1 kHz); ±250 for 15 seconds (dc to 1 kHz).

Pulse memory: indicates first entry into valid logic level: also indicates

return to initial valid level from bad level for pulse > 1 μs wide.

Power Requirements

TTL: 4.5 to 15 Vdc*. CMOS: 3 to 18 Vdc. Maximum current: 70 mA.

Overload protection: ±25 Vdc for one minute.

*+5±10% Vdc power supply; usable to +15 Vdc with slightly increased logic low threshold.

Pump has been rebuilt and New Tubing Installed. 42W Desoldering station with
5 pin port, Vacuum and Air. Can use Desolder Tool, Soldering iron and
hot Air tools for surface mount work, Vacuum will provide at least 16 inches of mercury minimum.

Base unit only
Weights less then 8.5 Lbs

Only $85.00