2–4
Altera Corporation
USB-Blaster Download Cable User Guide
December 2004
Operating Conditions
1
The circuit board must supply V
CC(TRGT)
and ground to the
USB-Blaster cable for the I/O drivers.
Circuit Board Header Connection
The circuit board's 10-pin male header, which connects to the USB-Blaster
cable's 10-pin female plug, has two rows of five pins. These pins are
connected to the device’s programming or configuration pins. Figure 2–3
shows the dimensions of a typical 10-pin male header.
Figure 2–3. 10-Pin Male Header Dimensions
Operating
Conditions
Tables 2–3 through 2–5 summarize the maximum ratings, recommended
operating conditions, and DC operating conditions for the USB-Blaster
cable.
0.025 Sq.
0.235
0.100
Side View
0.100
Top View
Dimensions are shown in inches.
Table 2–3. USB-Blaster Cable Absolute Maximum Ratings
Symbol
Parameter
Conditions
Min
Max
Unit
V
CC(TRGT)
Target supply voltage
With respect to ground
–0.3
5.5
V
V
CC(USB)
USB supply voltage
With respect to ground
–0.5
6.0
V
I
I
Input current
TDO
or
dataout
–10.0
10.0
mA
I
o
Output current
TCK
,
TMS
,
TDI
,
nCS
,
nCE
–20.0
20.0
mA
