Presettable synchronous BCD decade counter IC - 74HC160
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The 74HC Series 74HC160 is a high-speed Si-gate CMOS device and is pin-compatible with low-power Schottky TTL (LSTTL). They are specified in compliance with JEDEC standard no. 7A. The 74HC160 are synchronous presettable decade counters which feature an internal look-ahead carry and can be used for high-speed counting.
Synchronous operation is provided by having all flip-flops clocked simultaneously on the positive-going edge of the clock (CP). The outputs (Q0 to Q3) of the counters may be preset to a HIGH or LOW level. A LOW level at the parallel enable input (PE) disables the counting action and causes the data at the data inputs (D0 to D3) to be loaded into the counter on the positive-going edge of the clock (providing that the set-up and hold time requirements for PE are met).
Preset takes place regardless of the levels at count enable inputs (CEP and CET). A LOW level at the master reset input (MR) sets all four outputs of the flip-flops (Q0 to Q3) to LOW level regardless of the levels at CP, PE, CET, and CEP inputs (thus providing an asynchronous clear function). The look-ahead carry simplifies the serial cascading of the counters. Both counts enable inputs (CEP and CET) must be HIGH to count. The CET input is fed forward to enable the terminal count output (TC). The TC output thus enabled will produce a HIGH output pulse of a duration approximately equal to a HIGH-level output of Q0. This pulse can be used to enable the next cascaded stage.
| Symbol | Pin | Description |
| MR | 1 | Asynchronous master reset (active LOW) |
| CP | 2 | Clock input (LOW-to-HIGH, edge triggered) |
| D0, D1, D2, D3 | 3, 4, 5, 6 | Data input |
| CEP | 7 | Count enable input |
| GND | 8 | Ground (0 V) |
| PE | 9 | Parallel enable input (active LOW) |
| CET | 10 | Count enable carry input |
| Q0, Q1, Q2, Q3 | 14, 13, 12, 11 | Flip-flop output |
| TC | 15 | Terminal count output |
| VCC | 16 | Supply Voltage |
Selected qty of IC - 74HC160
| Series | 74HC |
| Function | Presettable Counter |
| Product Type | Counter Shift Registers |
| Counter Type | Presettable |
| Number of Circuits | 1 |
| Propagation Delay Time | 37 ns |
| Supply Voltage | 2V - 6V |
| Operating Temperature | -55°C - +125°C |
| Mounting Type | Through Hole |
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