MC74F269N Ver la hoja de datos (PDF) - Motorola => Freescale
Número de pieza
componentes Descripción
Fabricante
MC74F269N Datasheet PDF : 5 Pages
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MC74F269
FUNCTION TABLE
Inputs
Outputs
Operating Mode
Parallel Load
CP
U/D
CEP
CET
PE Pn
Qn
TC
↑
X
X
X
l
l
L
(a)
↑
X
X
X
l
h
H
(a)
Count Up
Count Down
↑
h
l
↑
l
l
l
h
X
Count Up
(a)
l
h
X
Count Down
(a)
Hold
Do Nothing
↑
X
h
X
h
X
qn
(a)
↑
X
X
h
h
X
qn
H
H = HIGH voltage level steady state
h = HIGH voltage level one set-up time prior to the LOW-to-HIGH clock transition
L = LOW voltage level steady state
l = LOW voltage level one set-up time prior to the LOW-to-HIGH clock transition
X = Don’t care
q = Lower case letters indicate the state of the referenced output prior to the LOW-to-HIGH clock transition
↑ = LOW-to-HIGH clock transition
(a) = The TC is LOW when CET is LOW and the counter is at Terminal Count. Terminal Count Up is with all Qn outputs HIGH and Terminal Count Down is with all
(a) = Qn outputs LOW.
DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (Unless otherwise specified)
Limits
Symbol
Parameter
Min
Typ
Max Unit
Test Conditions
VOH Output HIGH Voltage
2.5
74
2.7
3.4
VCC = 4.5 V
V IOH = –1.0 mA
VCC = 4.75 V
VOL Output LOW Voltage
74
0.35
0.5
V IOL = 20 mA, VCC = 4.5 V
VIK
Input Clamp Diode Voltage
–1.2
V VCC = MIN, IIN = –18 mA
IIH
Input HIGH Current
100
µA VCC = MAX
20
VIN = 7.0 V
VIN = 2.7 V
IIL
Input LOW Current
– 0.6
mA VCC = MAX, VIN = 0.5 V
IOS
Output Short Circuit Current (Note 2)
– 60
–150
mA VCC = MAX, VOUT = 0 V
ICC
Total Supply Current (total)
ICCH
ICCL
93
120
mA VCC = MAX
98
125
(Note 3)
(Note 4)
NOTES:
1. For conditions shown as MIN or MAX, use the appropriate value specified under guaranteed operating conditions for the applicable device type.
2. Not more than one output should be shorted at a time, nor for more than 1 second.
3. PE = CET = CEP = U/D = GND: Pn = 4.5 V: CP = ↑
4. PE = CET = CEP = U/D = GND: CP = ↑
FAST AND LS TTL DATA
4-139
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