74HC 74HC/HCT; Presettable Synchronous 4-bit Binary Counter; Synchronous Reset. For a complete data sheet, please also download. The IC GENERAL DESCRIPTION. The 74HC/HCT are high-speed Si-gate CMOS devices and are pin compatible with low power Schottky TTL. 74HC datasheet, 74HC pdf, 74HC data sheet, datasheet, data sheet, pdf, Philips, synchronous reset.
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Skip to main content. Log In Sign Up. General description The 74HC; 74HCT is a synchronous presettable binary counter with an internal look-head carry.
Synchronous operation is provided by having all flip-flops clocked simultaneously on the positive-going edge of the clock CP. It causes the data at the data inputs D0 to D3 to be loaded into the counter on the positive-going edge of the clock.
This synchronous reset feature enables the designer to modify the maximum count with only one external NAND gate. The datashdet carry simplifies serial cascading of the counters. This pulse can be used to enable the next cascaded stage. Inputs include clamp diodes. This enables the use of current limiting resistors to interface inputs to voltages in excess of VCC. Ordering information Table 1. Functional diagram Fig 2.
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Product data sheet Rev. Presettable synchronous 4-bit binary counter; synchronous reset Rev. Pin configuration SO16 Fig 6. Functional description Table 3. Typical timing 74ch163 7. Limiting values Table 4.
Recommended operating conditions Table 5. Static characteristics Table 6. Dynamic characteristics Table 7. Measurement points are given in Table 8.
Test circuit for measuring switching times Table 9. Application information The 74HC; 74HCT63 facilitate designing counters of any modulus with minimal external logic. The output is glitch-free due to the synchronous reset. Revision history Table Preliminary [short] data sheet Qualification This document contains data from the preliminary specification. Product [short] data sheet Production This document contains the product specification.
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