74HC243N Datasheet, PDF (9/17 Pages) NXP Semiconductors – Quad bus transceiver; 3-state

Philips Semiconductors
Table 8: Dynamic characteristics …continued
GND = 0 V; t_r = t_f = 6 ns; C_L = 50 pF; R_L = 1000 Ω; see Figure 8.
Symbol Parameter
Conditions
t_PZH, t_PZL
3-state output enable time OEA to An or Bn;
OEB to An or Bn
t_PHZ, t_PLZ
3-state output disable time OEA to An or Bn;
OEB to An or Bn
t_THL, t_TLH output transition time
T_amb = −40 °C to +125 °C
t_PHL, t_PLH propagation delay An to Bn; Bn to An
t_PZH, t_PZL
3-state output enable time OEA to An or Bn;
OEB to An or Bn
t_PHZ, t_PLZ
3-state output disable time OEA to An or Bn;
OEB to An or Bn
t_THL, t_TLH output transition time
see Figure 6 and 7
V_CC = 2.0 V
V_CC = 4.5 V
V_CC = 6.0 V
see Figure 6 and 7
V_CC = 2.0 V
V_CC = 4.5 V
V_CC = 6.0 V
see Figure 5
V_CC = 2.0 V
V_CC = 4.5 V
V_CC = 6.0 V
see Figure 5
V_CC = 2.0 V
V_CC = 4.5 V
V_CC = 6.0 V
see Figure 6 and 7
V_CC = 2.0 V
V_CC = 4.5 V
V_CC = 6.0 V
see Figure 6 and 7
V_CC = 2.0 V
V_CC = 4.5 V
V_CC = 6.0 V
see Figure 5
V_CC = 2.0 V
V_CC = 4.5 V
V_CC = 6.0 V
[1] C_PD is used to determine the dynamic power dissipation (P_D in µW).
P_D = C_PD × V_CC2 × f_i × N + ∑(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;
∑(C_L × V_CC2 × f_o) = sum of outputs.
74HC243
Quad bus transceiver; 3-state
Min Typ Max Unit
-
-
190 ns
-
-
38 ns
-
-
33 ns
-
-
205 ns
-
-
41 ns
-
-
35 ns
-
-
75 ns
-
-
15 ns
-
-
13 ns
-
-
135 ns
-
-
27 ns
-
-
23 ns
-
-
225 ns
-
-
45 ns
-
-
38 ns
-
-
250 ns
-
-
50 ns
-
-
43 ns
-
-
90 ns
-
-
18 ns
-
-
15 ns
9397 750 13808
Product data sheet
Rev. 03 — 12 November 2004
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
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