7447 PDF Datasheet – BCD to 7-Segment Decoder / Driver

This post explains for the TTL.

The Part Number is 7447.

The function of this semiconductor is BCD to 7-Segment Decoder / Driver.

The package is DIP 16 Pin Type

Manufacturer: Fairchild Semiconductor

Preview :

7447 image


The 7447 is  BCD to 7-Segment Decoder / Driver.

The DM7446A and DM7447A feature active-LOW outputs designed for driving common-anode LEDs or incandescent indicators directly. All of the circuits have full ripple-blanking input/output controls and a lamp test input. Segment identification and resultant displays are shown on a following page. Display patterns for BCD input counts above nine are unique symbols to authenticate input conditions. All of the circuits incorporate automatic leading and/or trailing-edge, zero-blanking control (RBI and RBO). Lamp test (LT) of these devices may be performed at any time when the BI/RBO node is at a HIGH logic level.


2 page


1. Open-Collector Outputs Drive Indicators Directly

2. Lamp-Test Provision

3. Leading / Trailing Zero Suppression


Other data sheets are available within the file: DM7446AN, DM7447AN, SN7446A, SN74LS46


7447 PDF Datasheet

7447 pdf


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74HC74 Datasheet PDF – Dual D-type Flip-Flop

This is one of the TTL IC types.

Part Number: 74HC74

Function: Dual D-Type Positive-Edge-Triggered Flip-Flop

Package: 14 Pin DIP, SO, SOIC, TSSOP, CIP

Manufacturer: NXP, TI, Philips, ON Semiconductor

74HC74 Flip-Flop


The 74HC74 is identical in pinout to the LS74. The device inputs are compatible with standard CMOS outputs; with pullup resistors, they are compatible with LSTTL outputs. This device consists of two D flip−flops with individual Set, Reset, and Clock inputs. Information at a D−input is transferred to the corresponding Q output on the next positive going edge of the clock input. Both Q and Q outputs are available from each flip−flop. The Set and Reset inputs are asynchronous.

Truth Table
74HC74 truth table


1. Output Drive Capability: 10 LSTTL Loads
2. Outputs Directly Interface to CMOS, NMOS, and TTL
3. Operating Voltage Range: 2.0 to 6.0 V
4. Low Input Current: 1.0 A
5. High Noise Immunity Characteristic of CMOS Devices
6. In Compliance with the JEDEC Standard No. 7A Requirements


74HC74 Pinout

74HC74 datasheet pinout


The 74HC74 and 74HCT74 are dual positive edge triggered D-type flip-flop. They have
individual data (nD), clock (nCP), set (nSD) and reset (nRD) inputs, and complementary
nQ and nQ outputs. Data at the nD-input, that meets the set-up and hold time requirements on the LOW-to-HIGH clock transition, is stored in the flip-flop and appears at
the nQ output. Schmitt-trigger action in the clock input, makes the circuit highly tolerant to slower clock rise and fall times. Inputs include clamp diodes that enable the use of current limiting resistors to interface inputs to voltages in excess of VCC.

Other data sheets are available within the file: 74HC74BQ, 74HC74CU, 74HC74D, 74HC74N, SN74HC74N

74HC74 Datasheet PDF Download

74HC74 pdf


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