ASIC Description
Power supply : 0V-2.5V Consumption current : 160 mA Total number of pins: 76 pins Unidirectional input Number : 16 pins Unidirectional output Number : 18 pins
Unused pins : 7 pins
0V (VSS): 12 pins
2.5 V (VDD) 9 pins
VSSA OUTP1VSS
InM1 OUTM1
InP1 VSS
VSSA OUTP2
InM2 OUTM2
InP2 VDD
VSSA OUTP3
InM3 OUTM3
InP3 VSS
VSSA OUTP4
InM4 OUTM4
InP4 VDD
RextMinus
RextPlus VSS
InM5 OUTP5
InP5 OUTM5
VSSA VDD
InM6 OUTP6
InP6 OUTM6
VSSA VSS
InM7 OUTP7
InP7 OUTM7
VSSA VDD
InM8 OUTP8
InP8 OUTM8
VSSA VDD
46 45 44 43 42 41 40 39 38 37
36 72 35 71 34 70 33 69 32 68 31 67 30 66 29 65 28 64 27 63 26 62 25 61 24 60
23 59
22 58
21 57
20 56
19 55
18 54
17 53
16 52
15 51
14 50
13 49
12 48
11 47
10 9 8 7 6 5 4 3 2 1
NINO 2
2 x 4 mm2
1 2 3
4
5 6
7 8
9 10
11 12
13 14 15 16 17
18 19 21 20
22 23 24 25 26
27 28 29
30 31
32 33
36
34 35 37
38 39 40
41
42 43
44 45
46 47
48 49
50 52 51
53
54
55 56
58 59 60
62 61
64 63
65 66 67
68
69 70
71 72
73 74
57
75 76
N.B. The reference dot on the package is in the top left hand corner – corresponding to pin 53 (not to pin 1).
1. Description of the pin functions
InP1, InM1, … , In M8. Differential signal input OUTM1, OUTP1, … , OUTP8. LVDS output driver.
WO+, WO- : LVDS output signal that is the OR of all 8 channels
HystOff (pin 5) switches on (connect to +2.5V via 100 kΩ) and off (connect to 0V) the built in hysteresis of the discriminator.
StchOff (pin 7) ) switches on (connect to +2.5V via 100 kΩ) and off (connect to 0V) the stretcher built into the output pulse of the discriminator.
BiasN8 (pin 9) Sets the amount of time that is added to the output width (stretch time) : 1.25 V corresponds to 10 ns.
BiasN6 (pin 41) A resistor connected from VDD to this bias point sets the output current in LVDS output driver: 200 Ω for 5mA; 150 Ω for 6 mA (maximum).
BiasN5 (pin 43) This is a test point and should be left floating.
BiasN7 (pin 45) This controls the amount of hysteresis (0V corresponds to no hysteresis)
ThPlus and ThMinus (pins 49 and 47) These set the threshold: this is a differential voltage that can have a common value between 0.5 V and 2.0 V. The difference in this voltage sets the threshold (100 mV = 25 fC).
RextPlus and RextMinus – the value of a resistor between these two points sets the input impedance. Rext of 20 Ω corresponds to an input impedance of 40 Ω (minimum value). Rext of 35 Ω corresponds to 70 Ω input impedance.
