74HC253 Datasheet, PDF (9/17 Pages) NXP Semiconductors – Dual 4-input multiplexer; 3-state

NXP Semiconductors
12. Waveforms
74HC253; 74HCT253
Dual 4-input multiplexer; 3-state
V_I
Sn, 1In, 2ln input
GND
V_OH
nY output
V_OL
V_M
V_M
t_PHL
V_M
t_THL
V_M
10 %
t_PLH
90 %
t_TLH
001aal855
Fig 6.
Measurement points are given in Table 8.
V_OL and V_OH are typical voltage output levels that occur with the output load.
Propagation delays input (Sn, 1In, 2In) to output (nY) and output (nY) transition times
V_I
nOE input
GND ^{10 %}
V_CC
output
LOW-to-OFF
OFF-to-LOW
V_OL
output
HIGH-to-OFF
OFF-to-HIGH
V_OH
GND
t_r
90 %
V_M
t_PLZ
t_PHZ
outputs
enabled
10 %
90 %
t_f
t_PZL
V_M
t_PZH
outputs
disabled
V_M
outputs
enabled
001aal856
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.
3-state output enable and disable times
Table 8. Measurement points
Type
74HC253
74HCT253
Input
V_M
0.5V_CC
1.3 V
Output
V_M
0.5V_CC
1.3 V
74HC_HCT253_3
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 03 — 22 April 2010
© NXP B.V. 2010. All rights reserved.
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