74HC_HCT4851_15 Datasheet, PDF (11/20 Pages) NXP Semiconductors – 8-channel analog multiplexer/demultiplexer with injection-current effect control

NXP Semiconductors
74HC4851; 74HCT4851
8-channel analog MUX/DEMUX with injection-current effect control
Table 9. Dynamic characteristics …continued
At recommended operating conditions; voltages are referenced to GND (ground 0 V); for load circuit see Figure 14.
Symbol Parameter
Conditions
25 °C
−40 °C to +85 °C −40 °C to +125 °C Unit
Min Typ Max Min Max
Min
Max
74HCT4851
t_pd
propagation delay Z, Yn to Yn, Z;
[1]
see Figure 10
V_CC = 4.5 V
Sn to Z, Yn;
see Figure 11
1.6 3.7 11.5 1.1 12.5
1.1
13.5 ns
[1]
t_en
enable time
V_CC = 4.5 V
E to Z, Yn;
see Figure 12
3.2 8.0 13 2.3
15
2.3
17 ns
[2]
t_dis
disable time
V_CC = 4.5 V
E to Z, Yn;
see Figure 12
4.2 8.6 25 3.0
30
3.0
35 ns
[3]
V_CC = 4.5 V
C_PD
power dissipation per channel;
capacitance
see Figure 13
28.5 64.7 80 28.2
90
28
100 ns
[4]
V_CC = 5.0 V
- 30 -
-
-
-
-
pF
[1] t_pd is the same as t_PLH and t_PHL.
[2] t_en is the same as t_PZH and t_PZL.
[3] t_dis is the same as t_PLZ and t_PHZ.
[4] C_PD is used to determine the dynamic power dissipation (P_D in µW):
P_D = C_PD × V_CC2 × f_i + ∑{(C_L + C_sw) × V_CC2 × f_o} where:
f_i = input frequency in MHz;
f_o = output frequency in MHz;
∑{(C_L + C_sw) × V_CC2 × f_o} = sum of outputs;
C_L = output load capacitance in pF;
C_sw = switch capacitance in pF;
V_CC = supply voltage in V.
12. Waveforms
V_CC
Z or Yn
input
GND
V_CC
Yn or Z
output
GND
0.5V_CC
t_PLH
0.5V_CC
Fig 10. Input (Z, Yn) to output (Yn, Z) propagation delays
t_PHL
001aah574
74HC_HCT4851_2
Product data sheet
Rev. 02 — 2 September 2008
© NXP B.V. 2008. All rights reserved.
11 of 20