N74F85N,602 NXP Semiconductors, N74F85N,602 Datasheet - Page 4

• Manufacturer Part Number: N74F85N,602
• Description: IC COMPARATOR MAGNITUDE 4B 16DIP
• Manufacturer: NXP Semiconductors
• Series: 74Fr
• Type: Magnitude Comparatorr

Specifications of N74F85N,602

• Number Of Bits: 4
• Delay Time - Propagation: 9.5ns
• Current - Supply: 40mA
• Voltage - Supply: 4.5 V ~ 5.5 V
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 16-DIP (0.300", 7.62mm)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 568-1735-5; 933740020602; N74F85N

Philips Semiconductors
APPLICATION
September 27, 1994
4-bit magnitude comparator
INPUTS
(LSB)
(LSB)
B23
A23
B22
A22
B21
A21
B20
A20
B19
A19
B18
A18
B17
A17
B16
A16
B15
A15
B14
A14
B13
A13
B12
A12
B11
A11
B10
A10
B9
A9
B8
A8
B7
A7
B6
A6
B5
A5
B4
A4
B3
A3
B2
A2
B1
A1
B0
A0
Figure 1. Comparison of Two 24-Bit Words
H
L
L
L
L
L
L
B3
A3
B2
A2
B1
A1
B0
A0
I
I
I
B3
A3
B2
A2
B1
A1
B0
A0
I
I
I
B3
A3
B2
A2
B1
A1
B0
A0
I
I
I
B3
A3
B2
A2
B1
A1
B0
A0
I
I
I
B3
A3
B2
A2
B1
A1
B0
A0
I
I
I
A<B
A=B
A>B
A<B
A=B
A>B
A<B
A=B
A>B
A<B
A=B
A>B
A<B
A=B
A>B
A<B
A=B
A>B
A<B
A=B
A>B
A<B
A=B
A>B
A<B
A=B
A>B
A<B
A=B
A>B
NC
NC
NC
NC
B3
A3
B2
A2
B1
A1
B0
A0
A<B
A=B
A>B
A<B
A=B
A>B
OUTPUTS
SF00079
4
The parallel expansion scheme shown in Figure 1 demonstrates the
most efficient general use of these comparators. The expansion
inputs can be used as a fifth input bit position except on the least
significant device, which must be connected as in the serial scheme.
The expansion inputs used by labeling I
a “B” input and setting I
comparator only when the outputs are used to drive the (A0–A3) and
(B0–B3) inputs of another 74F85 device. The parallel technique can
be expanded to any number of bits as shown in Table 1.
Table 1.
WORD LENGTH
25–120 bits
5–24 bits
1–4 bits
A=B
NUMBER OF
= Low. The 74F85 can be used as a 5-bit
PACKAGES
8–31
2–6
1
A>B
as an “A” input, I
TYPICAL SPEEDS
Product specification
74F85
12ns
22ns
34ns
74F
A<B
as