74HC2G17 Datasheet, PDF (8/18 Pages) NXP Semiconductors – Dual non-inverting Schmitt trigger

NXP Semiconductors
74HC2G17; 74HCT2G17
Dual non-inverting Schmitt trigger
Table 9. Dynamic characteristics …continued
Voltages are referenced to GND (ground = 0 V); for test circuit see Figure 6.
Symbol Parameter
Conditions
25 °C
Min Typ Max
74HCT2G17
t_pd
propagation delay
t_t
transition time
C_PD
power dissipation
capacitance
nA to nY; see Figure 5
V_CC = 4.5 V; C_L = 50 pF
nY; see Figure 5
V_CC = 4.5 V; C_L = 50 pF
V_I = GND to V_CC − 1.5 V
[1]
-
[2]
-
[3] _-
21 29
6 15
10 -
−40 °C to +125 °C Unit
Min Max
Max
(85 °C) (125 °C)
-
36
45 ns
-
19
22 ns
-
-
-
pF
[1] t_pd is the same as t_PLH and t_PHL
[2] t_t is the same as t_TLH and t_THL
[3] C_PD is used to determine the dynamic power dissipation (P_D in µW).
P_D = C_PD × V_CC2 × f_i × N + Σ(C_L × V_CC2 × f_o) where:
f_i = input frequency in MHz;
f_o = output frequency in MHz;
C_L = output load capacitance in pF;
V_CC = supply voltage in V;
N = number of inputs switching;
Σ(C_L × V_CC2 × f_o) = sum of the outputs.
13. Waveforms
V_I
nA input
GND
V_M
t_PLH
V_M
t_PHL
V_OH
nY output
V_OL
10 %
90 %
t_TLH
90 %
10 %
t_THL
001aaf302
Measurement points are given in Table 10.
V_OL and V_OH are typical voltage output drop that occur with the output load.
Fig 5. The data input (nA) to output (nY) propagation delays and output transition times
Table 10. Measurement points
Type
Input
74HC2G17
74HCT2G17
V_M
0.5V_CC
1.3 V
V_I
GND to V_CC
GND to 3.0 V
t_r = t_f
6.0 ns
6.0 ns
Output
V_M
0.5V_CC
1.3 V
74HC_HCT2G17_1
Product data sheet
Rev. 01 — 6 October 2006
© NXP B.V. 2006. All rights reserved.
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