Transistor Archives - Page 6 of 27

Part number : 7491, 74LS91, 74HC91

Functions : 8-bit Shift Register

Package: 14 Pin DIP type

Manufactures : Hitachi, Texas Instruments

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7491 Shift Register

Description

This serial-in, serial-out, 8-bit shift register is composed of eight R-S master-slave flip-flops, input gating, and a clock drive. Single-rail data and input control are gated through inputs A and B and an internal inverter to form the complementary inputs to the first bit of the shift register. Drive for the internal common clock line is provided by an inverting clock driver. This clock pulse inverter/driver causes these circuits to shift information one bit on the positive edge of an input clock pulse.

Pinout

7491 datasheet pinout

Features

1. High Speed Operation: tpd (Data Word Input to Output) = 21 ns typ (CL = 50 pF)
2. High Output Current: Fanout of 10 LSTTL Loads
3. Wide Operating Voltage: VCC = 2 to 6 V
4. Low Input Current: 1 µA max
5. Low Quiescent Supply Current: ICC (static) = 4 µA max (Ta = 25°C)

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Truth Table

7491 Truth Function Table

Applications

1. Digital Computer System
2. Data-Handling System
3. Control System

7491 Datasheet

Part number : P1013AP13, NCP1013AP13

Functions : High Voltage Switching Regulator for Offline SMPS

Package: DIP 7 Pin type

Manufactures : ON Semiconductor

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P1013AP13 Switching Regulator

Description

The P1013AP13 is integrates a fixed-frequency current-mode controller and a 700 V voltage MOSFET. Housed in a PDIP7 package, the P1013AP13 offers everything needed to build a rugged and low-cost power supply, including soft-start, frequency jittering, short-circuit protection, skip-cycle, a maximum peak current setpoint and a Dynamic Self-Supply (no need for an auxiliary winding).

Unlike other monolithic solutions, the NCP101X is quiet by nature: during nominal load operation, the part switches at one of the available frequencies (65-100-130 kHz). When the current setpoint falls below a given value, e.g. the output power demand diminishes, the IC automatically enters the so-called skip cycle mode and provides excellent efficiency at light loads. Because this occurs at typically 1/4 of the maximum peak value, no acoustic noise takes place. As a result, standby power is reduced to the minimum without acoustic noise generation.
Pinout

P1013AP13 datasheet pinout

Features

1. Built-in 700V MOSFET with Typical RdsON of 11 or 22 Ohms

2. Large Creepage Distance between High-Voltage Pins

3. Current- Mode Fixed Frequency Operation: 65kHz – 100kHz – 130kHz

4. Skip-Cycle Operation at Low Peak Currents Only: No Acoustic Noise!

5. Dynamic Self-Supply, No Need of an Auxiliary Winding

6. Internal 1ms Soft-Start

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Applications

1. Auxiliary Power Supplies
2. Low Power AC/DC Adapter for Chargers

Transistor

7491 Datasheet – 8-bit Shift Register

7491 Datasheet

P1013AP13 Datasheet – Switching Regulator for Offline SMPS

P1013AP13 Datasheet