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74HCT109 Arkusz danych(PDF) 2 Page - NXP Semiconductors

Numer części 74HCT109
Szczegółowy opis  Dual JK flip-flop with set and reset; positive-edge trigger
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Producent  PHILIPS [NXP Semiconductors]
Strona internetowa  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

74HCT109 Arkusz danych(HTML) 2 Page - NXP Semiconductors

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1997 Nov 25
2
Philips Semiconductors
Product specification
Dual JK flip-flop with set and reset;
positive-edge trigger
74HC/HCT109
FEATURES
• J, K inputs for easy D-type flip-flop
• Toggle flip-flop or “do nothing” mode
• Output capability: standard
• ICC category: flip-flops
GENERAL DESCRIPTION
The 74HC/HCT109 are high-speed Si-gate CMOS devices
and are pin compatible with low power Schottky TTL
(LSTTL). They are specified in compliance with JEDEC
standard no. 7A.
The 74HC/HCT109 are dual positive-edge triggered, JK
flip-flops with individual J, K inputs, clock (CP) inputs, set
(SD) and reset (RD) inputs; also complementary Q and Q
outputs.
The set and reset are asynchronous active LOW inputs
and operate independently of the clock input.
The J and K inputs control the state changes of the
flip-flops as described in the mode select function table.
The J and K inputs must be stable one set-up time prior to
the LOW-to-HIGH clock transition for predictable
operation.
The JK design allows operation as a D-type flip-flop by
tying the J and K inputs together.
Schmitt-trigger action in the clock input makes the circuit
highly tolerant to slower clock rise and fall times.
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
CL = 15 pF;
VCC = 5 V
nCP to nQ, nQ15
17
ns
nSD to nQ, nQ12
14
ns
nRD to nQ, nQ12
15
ns
fmax
maximum clock frequency
75
61
MHz
CI
input capacitance
3.5
3.5
pF
CPD
power dissipation
capacitance per flip-flop
notes 1 and 2
20
22
pF


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