| DTU1141 build A2 |
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| Name |
Alias |
Shape |
Farnell Code |
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Comments |
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| C1 |
NF |
CAP254 |
NF = not fitted |
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| C2 |
NF |
CAP254 |
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| C3 |
100N |
CAP254 |
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| C4 |
100N |
CAP254 |
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| C5 |
15P |
CAP254 |
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| C6 |
15P |
CAP254 |
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| C7 |
100N |
CAP254 |
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| C8 |
10U |
CAP508!1 |
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| C9 |
470U |
CAP254 |
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| D1 |
NF |
DIOD10 |
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| D2 |
NF |
DIOD10 |
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| D3 |
NF |
DIOD10 |
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| D4 |
SCHOTTKY |
DIOD10 |
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| D5 |
SCHOTTKY |
DIOD10 |
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| J1 |
Header |
SIL2 |
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| J5 |
2X13WAY_SOCKET |
CON30A |
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| J7 |
2X13WAY_SOCKET |
CON30A |
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| J9 |
Header |
SIL2 |
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| J14 |
Header |
SIL5 |
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| LED1 |
LED |
SIL2 |
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| LK1 |
0R |
RES10 |
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| LK2 |
0R |
RES10 |
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| LK3 |
0R |
RES10 |
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| LK4 |
0R |
RES10 |
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| LK5 |
0R |
RES10 |
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| LK6 |
0R |
RES10 |
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| LK7 |
0R |
RES10 |
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| LK8 |
0R |
RES10 |
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| LK9 |
0R |
RES10 |
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| FS1 |
NF |
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| R1 |
33K |
RES10 |
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| R2 |
33K |
RES10 |
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| R3 |
33K |
RES10 |
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| R4 |
NF |
RES10 |
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| R5 |
1K5 |
RES10 |
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| R6 |
33K |
RES10 |
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| R7 |
220R |
RES10 |
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| R8 |
33K |
RES10 |
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| R9 |
1K5 |
RES10 |
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| R10 |
1K5 |
RES10 |
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| R11 |
100R |
RES10 |
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| R12 |
100R |
RES10 |
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| R13 |
33K |
RES10 |
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| R14 |
33K |
RES10 |
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| R15 |
33K |
RES10 |
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| R16 |
1K5 |
RES10 |
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| U1 |
NF |
TO-220 |
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| U2 |
DSPIC33FJ128GP802 |
SDIP28A |
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| U3 |
74AC574 |
DIP20A |
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| XTAL1 |
20MHZ |
XTAL2 |
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| ZD1 |
3V3 |
DIOD10 |
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| Qnt |
Alias |
Shape |
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| 3 |
100N |
CAP254 |
145-7657 |
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| 2 |
15P |
CAP254 |
182-7806 |
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| 1 |
10U |
CAP508!1 |
970-8448 |
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4v min tantalum ESR < 5R - can be 2.54 or
5.08 spacing - take care when fitting |
| 1 |
470U |
CAP254 |
183-4108 |
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6v Electrolytic - value not critical |
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| 2 |
SCHOTTKY SB1100 |
DIOD10 |
165-1106 |
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Get 2 extra - you may need them later |
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| 1 |
SDRAM_SOCKET |
SD3 |
918-6158 |
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| 9 |
0R |
RES10 |
933-9027 |
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0R links look prettier |
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| 8 |
33K |
RES10 |
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Pullup, so anything up to 68k should be OK |
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| 4 |
1K5 |
RES10 |
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2 of these should
be 1% matched for Nyquist filter |
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| 1 |
220R |
RES10 |
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| 2 |
100R |
RES10 |
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1% matched for Nyquist filter |
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| 1 |
3V3 |
DIOD10 |
146-7600 |
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| 1 |
DSPIC33FJ128GP802 |
SDIP28A |
157-6801 |
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Requires programming |
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| 1 |
28 pin socket |
SDIP28A |
110-3850 |
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| 1 |
74AC574 |
DIP20A |
165-2006 |
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| 1 |
20 pin socket |
DIP20A |
110-3848 |
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| 1 |
20MHZ |
XTAL2 |
161-1779 |
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HC49/4H |
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| 1 |
FT2232HQ module |
169-7465 |
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| 2 |
2X13WAY_SOCKET |
CON30A |
341-9290 |
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For FT2232HQ
module |
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| 1 |
10 way header |
102-2261 |
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| 1 |
LED |
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Hole sizes 0.8mm except: |
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J1, J9, J14, D1-D5 = 0.9mm (1mm will be OK) |
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J5, J7, U1 = 1mm |
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The FT2232HQ module USB socket is almost flush
with the edge of the pcb |
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Holes for 26 way sockets are 0.9mm - all others
0.8mm (depending on Schottky type) |
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The 74AC574 does the same job as the 74244 in
the original design. The 100R and 1k5 resistors are also on board. |
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Outputs I+ and Q+ are (I + I*) and (Q + Q*) |
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I, Q, I*, Q* are still available separately if
required. |
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3 long wire links need to be made between pairs
of single pads: |
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A to A |
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B to B |
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D to D |
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