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74HCT4516N bảng dữ liệu(PDF) 2 Page - NXP Semiconductors

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December 1990
2
Philips Semiconductors
Product specification
Binary up/down counter
74HC/HCT4516
FEATURES
• Output capability: standard
• ICC category: MSI
GENERAL DESCRIPTION
The 74HC/HCT4516 are high-speed Si-gate CMOS
devices and are pin compatible with the “4516” of the
“4000B” series. They are specified in compliance with
JEDEC standard no. 7A.
The 74HC/HCT4516 are edge-triggered synchronous
up/down 4-bit binary counters with a clock input (CP), an
up/down count control input (UP/DN), an active LOW
count enable input (CE), an asynchronous active HIGH
parallel load input (PL), four parallel inputs (D0 to D3), four
parallel outputs (Q0 to Q3), an active LOW terminal count
output (TC), and an overriding asynchronous master reset
input (MR).
Information on D0 to D3 is loaded into the counter while PL
is HIGH, independent of all other input conditions except
the MR input, which must be LOW. When PL and CE are
LOW, the counter changes on the LOW-to-HIGH transition
of CP. UP/DN determines the direction of the count, HIGH
for counting up, LOW for counting down. When counting
up, TC is LOW when Q0 to Q3 are HIGH and CE is LOW.
When counting down, TC is LOW when Q0 to Q3 and CE
are LOW. A HIGH on MR resets the counter (Q0 to
Q3 = LOW) independent of all other input conditions.
Logic equation for terminal count:
QUICK REFERENCE DATA
GND = 0 V; Tamb =25 °C; tr =tf = 6 ns
Notes
1. CPD is used to determine the dynamic power dissipation (PD in µW):
PD =CPD × VCC2 × fi +∑ (CL × VCC2 × fo) where:
fi = input frequency in MHz
fo = output frequency in MHz
∑ (CL × VCC2 × fo) = sum of outputs
CL = output load capacitance in pF
VCC = supply voltage in V
2. For HC the condition is VI = GND to VCC
For HCT the condition is VI = GND to VCC − 1.5 V
ORDERING INFORMATION
See
“74HC/HCT/HCU/HCMOS Logic Package Information”.
SYMBOL
PARAMETER
CONDITIONS
TYPICAL
UNIT
HC
HCT
tPHL/ tPLH
propagation delay CP to Qn
CL = 15 pF; VCC =5 V
19
19
ns
fmax
maximum clock frequency
45
57
MHz
CI
input capacitance
3.5
3.5
pF
CPD
power dissipation capacitance per package
notes 1 and 2
59
61
pF
TC = CE . {(UP/DN) . Q
0 .Q1 .Q2 .Q3 +( UP DN
). Q0 .Q1 .Q2 .Q3}


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