74HC191D NXP Semiconductors, 74HC191D Datasheet - Page 5
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74HC191D
Manufacturer Part Number
74HC191D
Description
IC, 74HC CMOS, SMD, 74HC191, SOIC16
Manufacturer
NXP Semiconductors
Datasheet
1.74HC191D.pdf
(14 pages)
Specifications of 74HC191D
Counter Type
Binary
Clock Frequency
39MHz
Count Maximum
15
Supply Voltage Range
2V To 6V
Logic Case Style
SOIC
No. Of Pins
16
Operating Temperature Range
-40°C To +125°C
Svhc
No SVHC
Base Number
74
Rohs Compliant
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
74HC191D,653
Manufacturer:
NEXPERIA/安世
Quantity:
20 000
Philips Semiconductors
FUNCTION TABLE
TC AND RC FUNCTION TABLE
Notes
1. H = HIGH voltage level
December 1990
parallel load
count up
count down
hold (do nothing)
Presettable synchronous 4-bit binary
up/down counter
L = LOW voltage level
I
X = don’t care
U/D
H
H
H
L
L
L
= LOW-to-HIGH CP transition
= LOW voltage level one set-up time prior to the LOW-to-HIGH CP transition
OPERATING MODE
= one LOW level pulse
= TC goes LOW on a LOW-to-HIGH CP transition
INPUTS
CE
H
H
H
H
L
L
CP
X
X
X
X
Q
PL
H
H
H
H
H
H
L
L
L
L
L
0
Fig.4 Functional diagram.
TERMINAL COUNT STATE
U/D
X
X
H
X
L
Q
H
H
H
L
L
L
5
1
INPUTS
CE
X
X
H
I
I
Q
H
H
H
L
L
L
2
CP
X
X
X
Q
H
H
H
L
L
L
D
3
H
X
X
X
L
n
74HC/HCT191
OUTPUTS
Q
L
H
count up
count down
no change
n
TC
Product specification
H
H
L
L
OUTPUTS
RC
H
H
H
H