Manufacturer:
Nexperia
74HC191D,653
Counter, Presettable Binary, Synchronous, Up / Down, 74HC, 39 MHz, Max Count 15, 2 V to 6 V, 16 Pins, SOIC
Avnet Manufacturer Part #:
74HC191D,653
RoHS 10 Compliant
The 74HC/HCT191 are high-speed Si-gate CMOS devices and are pin compatible with low power Schottky TTL (LSTTL). They are specified in compliance with JEDEC standard no. 7A. The 74HC/HCT191 are asynchronously presettable 4-bit binary up/down counters. They contain four master/slave flip-flops with internal gating and steering logic to provide asynchronous preset and synchronous count-up and count-down operation. Asynchronous parallel load capability permits the counter to be preset to any desired number. Information present on the parallel data inputs (D0 to D3) is loaded into the counter and appears on the outputs when the parallel load input is LOW. As indicated in the function table, this operation overrides the counting function.
Key Features
- Synchronous reversible counting
- Asynchronous parallel load
- Count enable control for synchronous expansion
- Single up/down control input
- Output capability: standard
- ICC category: MSI
Technical Attributes
Find Similar Parts|
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Description | Value |
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Maximum Operating Supply Voltage | 6 V |
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No. of Pins | 16 |
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Propagation Delay | 220 ns |
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IC Case / Package | SOIC |
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Operating Temperature Min | -40 °C |
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No. of Elements | One |
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Logic IC Family | 74HC |
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Operating Temperature Max | 125 °C |
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Counter Type | Presettable Binary, Synchronous, Up / Down |
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Count Maximum | 15 |
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Supply Voltage Min | 2 V |
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Supply Voltage Max | 6 V |
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Clock Frequency | 39 MHz |
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Logic IC Base Number | 74191 |
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Logic Family / Base Number | 74HC191 |
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Minimum Operating Supply Voltage | 2 V |
ECCN / UNSPSC / COO
| Description | Value |
|---|---|
| ECCN: | EAR99 |
| SCHEDULE B: | 8542390000 |
| HTSN: | 8542390001 |