參數(shù)資料
型號(hào)： MC74F269DW
廠商： MOTOROLA INC
元件分類(lèi)： 通用總線功能
英文描述： Processor Supervisory Circuits 5-SOT-23 -40 to 85
中文描述： F/FAST SERIES, SYN POSITIVE EDGE TRIGGERED 8-BIT BIDIRECTIONAL BINARY COUNTER, PDSO24
封裝： SOIC-24
文件頁(yè)數(shù)： 2/5頁(yè)
文件大小： 139K
代理商： MC74F269DW
4-139
FAST AND LS TTL DATA
MC74F269
FUNCTION TABLE
Inputs
Outputs
Operating Mode
CP
U/D
CEP
CET
PE
Pn
l
h
Qn
L
H
TC
Parallel Load
↑
X
X
X
X
X
X
l
l
(a)
(a)
↑
Count Up
↑
h
l
l
h
X
Count Up
(a)
Count Down
↑
l
l
l
h
X
Count Down
(a)
Hold
Do Nothing
↑
X
X
h
X
X
h
h
h
X
X
qn
(a)
H
↑
qn
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)
Symbol
Parameter
Limits
Unit
Test Conditions
Min
Typ
Max
VOH
Output HIGH Voltage
74
2.5
V
IOH = –1.0 mA
VCC = 4.5 V
VCC = 4.75 V
2.7
3.4
VOL
VIK
Output LOW Voltage
74
0.35
0.5
V
IOL = 20 mA, VCC = 4.5 V
VCC = MIN, IIN = –18 mA
Input Clamp Diode Voltage
–1.2
V
IIH
Input HIGH Current
100
μ
A
VCC = MAX
VIN = 7.0 V
VIN = 2.7 V
20
IIL
IOS
Input LOW Current
–0.6
mA
VCC = MAX, VIN = 0.5 V
VCC = MAX, VOUT = 0 V
Output Short Circuit Current (Note 2)
–60
–150
mA
ICC
Total Supply Current (total)
ICCH
ICCL
93
120
mA
VCC = MAX
(Note 3)
98
125
(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 =
↑
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