74ALS109A 데이터 시트보기 (PDF) - Philips Electronics
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74ALS109A Datasheet PDF : 9 Pages
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Philips Semiconductors
Dual J-K positive edge triggered flip-flop
with set and reset
Product specification
74ALS109A
DESCRIPTION
The 74ALS109A is a dual positive edge-triggered JK-type flip-flop
featuring individual J, K, clock, set, and reset inputs; also true and
complementary outputs. Set (SD) and reset (RD) are asynchronous
active-Low inputs and operate independently of the clock (CP) input.
The J and K are edge-triggered inputs which control the state
changes of the flip-flops as described in the function table. Clock
triggering occurs at a voltage level and is not directly related to the
transition time of the positive-going pulse. The J and K inputs must
be stable just one setup time prior to the Low-to-High transition of
the clock for predictable operation. The JK design allows operation
as a D flip-flop by tying J and K inputs together. Although the clock
input is level sensitive, the positive transition of the clock pulse
between the 0.8V and 2.0V levels should be equal to or less than
the clock to output delay time for reliable operation.
PIN CONFIGURATION
RD0 1
J0 2
K0 3
CP0 4
SD0 5
Q0 6
Q0 7
GND 8
TYPE
74ALS109A
TYPICAL
fMAX
150MHz
TYPICAL
SUPPLY CURRENT
(TOTAL)
3.0mA
ORDERING INFORMATION
ORDER CODE
DESCRIPTION
COMMERCIAL RANGE
VCC = 5V ±10%,
Tamb = 0°C to +70°C
16-pin plastic DIP
74ALS109AN
16-pin plastic SO
74ALS109AD
DRAWING
NUMBER
SOT38-4
SOT109-1
INPUT AND OUTPUT LOADING AND FAN-OUT TABLE
PINS
DESCRIPTION
74ALS (U.L.)
HIGH/LOW
J0, J1
J inputs
1.0/2.0
K0, K1
K inputs
1.0/2.0
CP0, CP1
Clock inputs (active rising edge)
1.0/2.0
SD0, SD1
Set inputs (active-Low)
1.0/4.0
RD0, RD1
Reset inputs (active-Low)
1.0/4.0
Q0, Q1, Q0, Q1
Data outputs
20/80
NOTE: One (1.0) ALS unit load is defined as: 20µA in the High state and 0.1mA in the Low state.
LOGIC SYMBOL
IEC/IEEE SYMBOL
4
5
1
12
11
15
VCC = Pin 16
GND = Pin 8
2 14 3 13
CP0 J0 J1 K0 K1
SD0
RD0
CP1
SD1
RD1 Q0 Q0 Q1 Q1
6 7 10 9
SF00136
2
1J
4
C1
3
1K
1
R
5
S
14
2J
12
C2
13
2K
15
R
11
S
1991 Feb 08
2
16 VCC
15 RD1
14 J1
13 K1
12 CP1
11 SD1
10 Q1
9 Q1
SF00135
LOAD VALUE
HIGH/LOW
20µA/0.2mA
20µA/0.2mA
20µA/0.2mA
20µA/0.4mA
20µA/0.4mA
0.4mA/8mA
6
7
10
9
SF00137
853–1275 01670
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