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參數(shù)資料
| 型號(hào)： | 933334340652 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 算術(shù)邏輯單元 |
| 英文描述： | 4000/14000/40000 SERIES, 4-BIT MAGNITUDE COMPARATOR, TRUE OUTPUT, PDIP16 |
| 封裝： | PLASTIC, SOT-38-1, DIP-16 |
| 文件頁數(shù)： | 2/6頁 |
| 文件大小： | 65K |
| 代理商： | 933334340652 |
January 1995
2
Philips Semiconductors
Product specication
4-bit magnitude comparator
HEF4585B
MSI
DESCRIPTION
The HEF4585B is a 4-bit magnitude comparator which
compares two 4-bit words (A and B), whether they are ‘less
than’, ‘equal to’, or ‘greater than’. Each word has four
parallel inputs (A0 to A3 and B0 to B3); A3 and B3 being the
most significant inputs. Three outputs are provided;
A greater than B (OA > B), A less than B (OA < B) and
A equal to B (OA=B). Three expander inputs (IA > B,
IA < B and IA=B) allow cascading of the devices without
external gates.
For proper compare operation the expander inputs to the
least significant position must be connected as follows:
IA=B =IA > B = HIGH, IA < B = LOW. For words greater than
4-bits, units can be cascaded by connecting outputs
OA<B and OA=B to the corresponding inputs of the next
significant comparator (input IA>B is connected to a
HIGH).
Operation is not restricted to binary codes, the devices will
work with any monotonic code. The function table
describes the operation of the device under all possible
logic conditions.
Fig.1 Functional diagram.
PINNING
FAMILY DATA, IDD LIMITS category MSI
See Family Specications
HEF4585BP(N):
16-lead DIL; plastic (SOT38-1)
HEF4585BD(F):
16-lead DIL; ceramic (cerdip) (SOT74)
HEF4585BT(D):
16-lead SO; plastic (SOT109-1)
( ): Package Designator North America
A0 to A3
word A parallel inputs
B0 to B3
word B parallel inputs
IA > B, IA < B, IA=B expander inputs
OA>B
A greater than B output
OA<B
A less than B output
OA=B
A equal to B output
Fig.2 Pinning diagram.
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