74AHC574D118 Datasheet, PDF (10/18 Pages) NXP Semiconductors – Octal D-type flip-flop; positive edge-trigger; 3-state

NXP Semiconductors
74AHC574; 74AHCT574
Octal D-type flip-flop; positive edge-trigger; 3-state
Table 7. Dynamic characteristics …continued
GND = 0 V. For test circuit see Figure 10.
Symbol Parameter Conditions
t_h
hold time Dn to CP; see Figure 8
V_CC = 4.5 V to 5.5 V;
C_L = 50 pF
C_PD
power
per buffer;
dissipation C_L = 50 pF; f = 1 MHz;
capacitance V_I = GND to V_CC
25 °C
−40 °C to +85 °C −40 °C to +125 °C Unit
Min Typ^[1] Max Min
Max
Min
Max
1.5 -
- 1.5
-
1.5
-
ns
[3] _-
12 -
-
-
-
-
pF
[1] Typical values are measured at nominal supply voltage (V_CC = 3.3 V and V_CC = 5.0 V).
[2] t_pd is the same as t_PLH and t_PHL.
t_en is the same as t_PZL and t_PZH.
t_dis is the same as t_PLZ and t_PHZ.
[3] C_PD is used to determine the dynamic power dissipation P_D (µW).
P_D = C_PD × V_CC2 × f_i + ∑ (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.
10.1 Waveforms
V_I
CP input
GND
V_OH
Qn output
V_OL
1/ f_max
V_M
t_W
t _PHL
V_M
t _PLH
mna802
Fig 7.
Measurement points are given in Table 8.
V_OL and V_OH are typical voltage output levels that occur with the output load.
Propagation delay input (CP) to output (Qn), clock input (CP) pulse width and the maximum frequency
(CP)
74AHC_AHCT574_2
Product data sheet
Rev. 02 — 24 January 2008
© NXP B.V. 2008. All rights reserved.
10 of 18