DM7446AN Fairchild Semiconductor, DM7446AN Datasheet - Page 2

• Manufacturer Part Number: DM7446AN
• Description: IC DECODER/DRVR BCD-7SEG 16-DIP
• Manufacturer: Fairchild Semiconductor
• Series: 7400r

Specifications of DM7446AN

• Display Type: LED
• Configuration: 7 Segment
• Interface: BCD
• Current - Supply: 60mA
• Voltage - Supply: 4.75 V ~ 5.5 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Through Hole
• Package / Case: 16-DIP (0.300", 7.62mm)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Digits Or Characters: -
• Other names: 7446; 7446N; DM7446N

www.fairchildsemi.com
Function Table
H
Note 1: BI/RBO is a wire-AND logic serving as blanking input (BI) and/or ripple-blanking output (RBO).
Note 2: The blanking input (BI) must be OPEN or held at a HIGH logic level when output functions 0 through 15 are desired. The ripple-blanking input (RBI)
must be OPEN or HIGH if blanking of a decimal zero is not desired.
Note 3: When a LOW logic level is applied directly to the blanking input (BI), all segment outputs are HIGH regardless of the level of any other input.
Note 4: When ripple-blanking input (RBI) and inputs A, B, C, and D are at a LOW level with the lamp test input HIGH, all segment outputs go H and the rip-
ple-blanking output (RBO) goes to a LOW level (response condition).
Note 5: When the blanking input/ripple-blanking output (BI/RBO) is OPEN or held HIGH and a LOW is applied to the lamp-test input, all segment outputs are
L .
Logic Diagram
HIGH level,
Decimal or
Function
RBI
10
12
13
14
15
LT
11
BI
0
1
2
3
4
5
6
7
8
9
LT
L
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
X
H
L
LOW level,
RBI
H
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
L
D
H
H
H
H
H
H
H
H
X
X
L
L
L
L
L
L
L
L
L
Inputs
X
C
H
H
H
H
H
H
H
H
X
X
L
L
L
L
L
L
L
L
L
Don’t Care
B
H
H
H
H
H
H
H
H
X
X
L
L
L
L
L
L
L
L
L
A
H
H
H
H
H
H
H
H
X
X
L
L
L
L
L
L
L
L
L
(Note 1)
BI/RBO
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
L
L
2
H
H
H
H
H
H
H
H
H
H
a
L
L
L
L
L
L
L
L
L
H
H
H
H
H
H
H
H
H
b
L
L
L
L
L
L
L
L
L
L
H
H
H
H
H
H
H
H
c
L
L
L
L
L
L
L
L
L
L
L
Outputs
H
H
H
H
H
H
H
H
d
L
L
L
L
L
L
L
L
L
L
L
H
H
H
H
H
H
H
H
H
H
H
H
e
L
L
L
L
L
L
L
H
H
H
H
H
H
H
H
H
L
L
L
L
L
L
L
L
L
L
f
H
H
H
H
H
H
g
L
L
L
L
L
L
L
L
L
L
L
L
L
(Note 2)
(Note 3)
(Note 4)
(Note 5)
Note