LeCroy 429A QUAD LOGIC SWITCH MATRIX FAN-IN/FAN-OUT NIM/TTL/CAMAC Module

Description

LeCroy 429A QUAD LOGIC FAN-IN/FAN-OUT
4 Inputs, and at Least 4 Outputs Per Channel
Positive or Negative Inputs
NIM Packaging
High Speed
CONDITION:
We are selling many LeCroy NIM/TTL/CAMAC modules (See our other eBay listings for details) all pulled from a working rack upon completion of single lab project.
USE:
COMBINING INPUTS OR DISTRIBUTING MULTIPLE OUTPUTS
Fan-in/fan-out units are accessory modules used to simplify the configuration of an experimental set up. The fan -in function adds or combines multiple analog signals and OR logic signals for later processing. The fan-out function makes multiple outputs from one or more analog or logic inputs. Fan-outs are commonly used to distribute gate or veto signals over a number of data acquisition units.
LeCroy's fan-in/fan-out units are available for use with either analog (linear) or logic signals. They are NIM standard modules for maximum flexibility.
FEATURES
Multiple Independent Units -
Each module contains four sections of fan-in/fan-out.
Multiple Inputs -
4 inputs per channel.
Multiple Outputs -
Each channel has 4 outputs and the Model 429A also has 2 complementary outputs.
Flexible Accessory -
Fan-in/fan-outs are useful utility modules which should be part of every lab.
FUNCTIONAL DESCRIPTION
The Model 429A is used with logic (NIM or TTL) signals. They are high performance versatile accessory modules which can be used in CAMAC crates if desired with the Model 4501A NIM-to-CAMAC adaptor (SEE PHOTOS).
Model 429A
The Model 429A is a multi-functional fast logic module designed to fulfill a wide variety of signal handling needs. It combines the operations of TTL-to-NIM level translation, logic fan-in, logic fan-out, and polarity inversion in one low-cost module. Each of the 4 channels of the 429A has four inputs which accept both NIM and TTL levels. This is particularly useful for test setups and experiments where digital triggers and/or control logic may use both signal standards.
Each channel of the 429A includes four independent logic inputs, four normal logic outputs, and two complementary logic outputs. Channels may be paralleled to provide up to 16 inputs and 24 outputs by means of a front -panel switch. An efficient circuit design holds power dissipation of the entire module to within the NIM standard.
The 429A eliminates the extra cabling and time delay involved when conventional fan-ins and fan-outs must be cascaded. In addition, it eliminates the common use of expensive logic units to perform logical OR with ad equate fan-out. The ability to conveniently parallel channels permits the 429A a degree of flexibility and efficiency heretofore unavailable.
Inputs are 50 ohm impedance for NIM or TTL signals. Unused inputs need not be terminated. Inputs may be driven with single or double amplitude NIM signals or TTL signals without affecting output amplitude. The three pairs of bridged outputs are direct-coupled current sources which deliver -32 mA into two 50 ohm loads. Output duration is equal to the logical OR of the input durations.
The circuitry of the 429A is completely direct-coupled and compatible with either normal or complementary logic signals in any duty ratio. Channel paralleling is accomplished by means of a single front-panel locking switch that is not in the signal path and hence permits switching with minimal effect on signal fidelity. Front-panel LEDs located between channels light to indicate channels that are combined, providing a clear, easily-interpreted display of the unit's status.
SPECIFICATIONS
Model 429A
Number of Sections:
4: may be cascaded by means of front-panel switch to form dual 8-fold fan-in/12-fold fan -out or single 16-fold fan-in/24-fold fan-out, with LED indication.
INPUT
Number of Inputs:
4 per section; 50 ohm ±5%; direct-coupled. Quiescent level is 0 V DC.
Signal Level Requirements:
Standard NIM logical 1 input levels, -12 mA to -36 mA; Standard TTL logical 1 input levels, +2 V to +5 V; signal width must be 4 nsec minimum, FWHM.
Reflection Coefficient:
< 10% for input rise times 2 nsec.
OUTPUT
Number of Outputs:
4 normal (2 bridged pairs); 2 complementary (1 bridged pair).
Output Levels:
Normal NIM (quiescently 0 mA, -32 mA into two 50 ohm loads during output). Complementary NIM (quiescently 32 mA into two 50 ohm loads, 0 mA during output). Duration is equal to the logical sum of the input durations.
Rise Times:
2.3 nsec typical, 2.8 nsec maximum.
Fall Times:
2.3 nsec typical, 2.8 nsec maximum.
MISCELLANEOUS
Time Variation of Output with Input Amplitude:
< 1 nsec worst case between inputs of -600 mV and -1.6 V; typically < 0.5 nsec.
Time Variation Between Outputs:
4 channels, 4 x 6 operation: < 0.2 nsec; 2 channels, 8 x 12 operation: < 0.4 nsec; 1 channel, 16 x 24 operation: < 0.9 nsec.
GENERAL
Rate:
DC to 100 MHz.
Input/Output:
< 6.5 nsec.
Duty Cycle Limitations:
None.
Packaging:
RF-shielded AEC/NIM #1 module. Lemo-type connectors.
Power Requirements:
35 mA at +12 V, 50 mA at -12 V, 295 mA at +6 V, 460 mA at -6 V.