74HCT257D NXP Semiconductors, 74HCT257D Datasheet - Page 10

• Manufacturer Part Number: 74HCT257D
• Description: IC, LOGIC, 74HCT, MULTIPLEXER, SO16
• Manufacturer: NXP Semiconductors

Specifications of 74HCT257D

• Logic Type: Multiplexer
• No. Of Outputs: 4
• Supply Voltage Range: 4.5V To 5.5V
• Logic Case Style: SOIC
• No. Of Pins: 16
• Operating Temperature Range: -40°C To +125°C
• Svhc: No SVHC (18-Jun-2010)
• Package: RoHS Compliant
• Logic Ic Base Number: 74257
• Rohs Compliant: Yes

NXP Semiconductors
Table 9.
74HC_HCT257_5
Product data sheet
Type
74HC257
74HCT257
Fig 8.
Measurement points are given in
Definitions test circuit:
R
C
R
Test circuit for switching times
T
L
L
Test data
= Termination resistance should be equal to output impedance Z
= Load capacitance including jig and probe capacitance.
= Load resistor.
Input
V
V
3 V
I
CC
t
6 ns
6 ns
r
negative
, t
positive
pulse
pulse
f
0 V
0 V
V
V
G
I
I
Table 8
90 %
10 %
V I
Load
C
50 pF
50 pF
and test data is given in
L
t
t
r
f
Rev. 05 — 13 January 2010
V
V
M
M
R T
10 %
90 %
DUT
V
CC
t
t
W
W
R
1 kΩ
1 kΩ
L
V O
Table
o
of the pulse generator.
V
V
M
M
9.
C L
74HC257; 74HCT257
t
t
r
f
R L
Switch position
t
open
open
PHL
S1
, t
001aad983
PLH
Quad 2-input multiplexer; 3-state
V
CC
open
t
GND
GND
PZH
, t
PHZ
© NXP B.V. 2010. All rights reserved.
t
V
V
PZL
CC
CC
, t
PLZ
10 of 17