Specifications
20
HP 44474A
• 16-bit TTL compatible digital I/O
• Input /Output re-configurable byte-by-byte
Description
The HP 44474A is a digital I/O module, providing 16 bi-
directional data lines (bits) plus 4 lines used for control
and handshaking. All lines are TTL compatible. The 16
data lines offer TTL compatible I/O or inputs and open
collector outputs. The 16 I/O lines or bits can be
addressed individually, or as two independent 8-bit
ports, or as one 16-bit port. For instance, one port can
be used for output operations, while the other for input.
Each I/O line can sink current up to 0.125 A from
external devices.
Specifications
I /O Lines
Maximum Voltage(line-chassis): +30V DC
Output Characteristics
V
out
(high): ≥ 2.4V @ I ≤ 8mA output
V
out
(low): ≤ 0.4V @ I ≤ 16mA input
I
out
(low): 125 mA@ V
out
≤ 1.25 V
Characteristics
Vin (high): ≥ 2.0V
Vin (low): ≤ 0.8V
Handshake Lines
Maximum Voltage(line-chassis): +5V DC
Output Characteristics
V
out
(high): ≥ 2.4V @ I≤ 400µA output
V
out
(low): ≤ 0.5V @ I≤ 2mA input
Input Characteristics
V
in
(high): ≥ 2.0V
V
in
(low) ≤ 0.8V
HP 44475A
• For custom designed special circuitry
Description
The HP 44475A is a breadboard module providing a
place for customer mounted circuits for special
applications. Occasionally, some desired functions may
not be available on a standard plug-in module. In such a
case, the HP 44475A provides the ideal solution. The
HP 44475A can be used in designing and building
special functions for your system. Filters, amplifiers,
and other custom circuitry can be implemented on the
breadboard's grid of plated holes. The supplied
documentation lets you interface your circuit directly
to the HP 3499A/B's internal bus control signals.
Specifications
Module Dimensions
Component Areas Available: 104mm x 74mm and 79mm x 74mm
Gird Hole Size (inside diameter): 1.17mm
Grid Hole Spacing(center-center): 2.54mm x 2.54mm
Maximum Component Height: 12.7mm (0.5")
(above Board)
Maximum Lead length: 3.2mm (0.125")
(below Board)
Input Characteristics
Maximum Voltage: 42V DC, 30V AC RMS
42V AC Peak
Maximum Power Dissipation: 2W
(per Modules)
Connection accessory
44485A Screw terminal block with
22 terminals for field wiring
16-Bit Digital Input/Output Module
Breadboard Module