74F533 8-Bit Octal Transparent Latch IC with Tri-State Outputs

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74F533 IC consists of eight latches with 3-state outputs for bus organized system applications. The flip-flops appear transparent to the data when Latch Enable (LE) is HIGH. When LE is LOW, the data that meets the setup times is latched. The 3-State buffers are controlled by the Output Enable (OE’) input. When OE’ is LOW, the buffers are in the bi-state mode. When OE’ is HIGH the buffers are in the high impedance mode, but this does not interfere with entering new data into the latches. 74F533 IC has a wide range of working voltage, a wide range of working conditions, and directly interfaces with CMOS, NMOS, and TTL. The IC 74F533 is smaller in size and it has a much faster speed which makes it reliable in every kind of device.

What is a Latch Circuit?

A latch is a device that can be used to store one bit of information. A latching circuit is used to capture, or ‘latch’ the logic level which is present on the Data line when the clock input is high. If the data on the Data line changes state while the clock pulse is high, then the output, Q, follows the input, D. When the CLK input falls to logic 0, the last state of the Data input is trapped and held in the latch.

74F533 Pinout

74F533 Pin Description

Pin No.	Pin Name	Description
1	OE’	Active Low Output Enable Pin
2	O0′	Complementary Tri-State Output O0′
3	D0	Data Input Pin D0
4	D1	Data Input Pin D1
5	O1′	Complementary Tri-State Output O1′
6	O2′	Complementary Tri-State Output O2′
7	D2	Data Input Pin D2
8	D3	Data Input Pin D3
9	O3′	Complementary Tri-State Output O3′
10	GND	Ground Pin
11	LE	Latch Enable Input
12	O4′	Complementary Tri-State Output O4′
13	D4	Data Input Pin D4
14	D5	Data Input Pin D5
15	O5′	Complementary Tri-State Output O5′
16	O6′	Complementary Tri-State Output O6′
17	D6	Data Input Pin D6
18	D7	Data Input Pin D7
19	O7′	Complementary Tri-State Output O7′
20	Vcc	Chip Supply Voltage