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74HC243N Datasheet(PDF) 9 Page - NXP Semiconductors

Part # 74HC243N
Description  Quad bus transceiver; 3-state
Download  17 Pages
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Manufacturer  PHILIPS [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

74HC243N Datasheet(HTML) 9 Page - NXP Semiconductors

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9397 750 13808
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
Product data sheet
Rev. 03 — 12 November 2004
9 of 17
Philips Semiconductors
74HC243
Quad bus transceiver; 3-state
[1]
CPD is used to determine the dynamic power dissipation (PD in µW).
PD =CPD × VCC2 × fi × N+ ∑(CL × VCC2 × fo) where:
fi = input frequency in MHz;
fo = output frequency in MHz;
CL = output load capacitance in pF;
VCC = supply voltage in V;
N = number of inputs switching;
∑(CL × VCC2 × fo) = sum of outputs.
tPZH, tPZL
3-state output enable time OEA to An or Bn;
OEB to An or Bn
see Figure 6 and 7
VCC = 2.0 V
-
-
190
ns
VCC = 4.5 V
-
-
38
ns
VCC = 6.0 V
-
-
33
ns
tPHZ, tPLZ
3-state output disable time OEA to An or Bn;
OEB to An or Bn
see Figure 6 and 7
VCC = 2.0 V
-
-
205
ns
VCC = 4.5 V
-
-
41
ns
VCC = 6.0 V
-
-
35
ns
tTHL, tTLH
output transition time
see Figure 5
VCC = 2.0 V
-
-
75
ns
VCC = 4.5 V
-
-
15
ns
VCC = 6.0 V
-
-
13
ns
Tamb = −40 °C to +125 °C
tPHL, tPLH
propagation delay An to Bn; Bn to An
see Figure 5
VCC = 2.0 V
-
-
135
ns
VCC = 4.5 V
-
-
27
ns
VCC = 6.0 V
-
-
23
ns
tPZH, tPZL
3-state output enable time OEA to An or Bn;
OEB to An or Bn
see Figure 6 and 7
VCC = 2.0 V
-
-
225
ns
VCC = 4.5 V
-
-
45
ns
VCC = 6.0 V
-
-
38
ns
tPHZ, tPLZ
3-state output disable time OEA to An or Bn;
OEB to An or Bn
see Figure 6 and 7
VCC = 2.0 V
-
-
250
ns
VCC = 4.5 V
-
-
50
ns
VCC = 6.0 V
-
-
43
ns
tTHL, tTLH
output transition time
see Figure 5
VCC = 2.0 V
-
-
90
ns
VCC = 4.5 V
-
-
18
ns
VCC = 6.0 V
-
-
15
ns
Table 8:
Dynamic characteristics …continued
GND = 0 V; tr =tf = 6 ns; CL = 50 pF; RL = 1000 Ω; see Figure 8.
Symbol
Parameter
Conditions
Min
Typ
Max
Unit


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