XLT28QFN4 Microchip Technology, XLT28QFN4 Datasheet - Page 33

• Manufacturer Part Number: XLT28QFN4
• Description: SOCKET TRANS ICE 28QFN W/CABLE
• Manufacturer: Microchip Technology

Specifications of XLT28QFN4

• Module/board Type: *
• Convert From: 28-DIP
• Convert To: 28-QFN
• Pitch Spacing: 0.025"
• Svhc: No SVHC (15-Dec-2010)
• Ic Adapter Type: Transition Socket
• Mounting Type: Through Hole
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• For Use With/related Products: MPLAB™ICE
• For Use With: AC162067 - HEADER INTRFC MPLAB ICD2 40/28PDAF18-4 - DEVICE ADAPTER FOR ICE4000DAF30-4 - DEVICE ATP FOR ICE4000DVA18XP280 - DEVICE ADAPTER 18F2220 PDIP 28LD
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

PLCC TRANSITION SOCKET
A PLCC transition socket and associated hardware is
shown in Figure 4.
FIGURE 4: PLCC TRANSITION SOCKET
The PLCC transition socket is required for use along
with the PLCC device adapters. The DAF18-1 device
adapter is equipped with eight socket strips that inter-
face with one of two transition sockets. The DAF18-3
device adapter is equipped with four socket strips that
interface with one transition socket.
The PLCC transition sockets are designed with a
threaded insert in the center of the footprint so that a
4/40 screw can securely fasten the transition socket to
the device adapter.
The PLCC transition sockets are designed to be sol-
dered to the target PCB PLCC surface mount pattern or
inserted into a PLCC socket on the target PCB.
The following PLCC transition sockets have been
discontinued:
• XLT68L1: One 68-lead PLCC transition socket
• XLT84L1: One 84-lead PLCC transition socket
 2010 Microchip Technology Inc.
Note:
To avoid solder bridging, do not place vias
within 0.025-inch of the PLCC footprint.
Also, any vias near the PLCC should be
directly on the centerline of the pad.
PLCC Transition Socket
PLCC Device Adapter
Cable to Processor Module
Target/Application Board
Transition Socket Specification
RECOMMENDED PCB LAYOUT
0.024
UNLESS OTHERWISE SPECIFIED, DIMENSIONS ARE
IN INCHES.
Drawing shown is for 68-lead.
0.050
68-lead
84-lead
A
1.025
1.225
A
DS51194S-page 33
0.074