| 164521 | 74HC4518DB | Dual synchronous BCD counter | Philips |
| 164522 | 74HC4518N | Dual synchronous BCD counter | Philips |
| 164523 | 74HC4518U | Dual synchronous BCD counter | Philips |
| 164524 | 74HC4520 | Dual 4-bit synchronous binary counter | Philips |
| 164525 | 74HC4520D | Dual 4-bit synchronous binary counter | Nexperia |
| 164526 | 74HC4520D | Dual 4-bit synchronous binary counter | NXP Semiconductors |
| 164527 | 74HC4520D | 74HC/HCT4520; Dual 4-bit synchronous binary counter | Philips |
| 164528 | 74HC4520D-Q100 | Dual 4-bit synchronous binary counter | Nexperia |
| 164529 | 74HC4520DB | Dual 4-bit synchronous binary counter | NXP Semiconductors |
| 164530 | 74HC4520DB | 74HC/HCT4520; Dual 4-bit synchronous binary counter | Philips |
| 164531 | 74HC4520N | Dual 4-bit synchronous binary counter | NXP Semiconductors |
| 164532 | 74HC4520N | 74HC/HCT4520; Dual 4-bit synchronous binary counter | Philips |
| 164533 | 74HC4520PW | Dual 4-bit synchronous binary counter | Nexperia |
| 164534 | 74HC4520PW | Dual 4-bit synchronous binary counter | NXP Semiconductors |
| 164535 | 74HC4520PW | 74HC/HCT4520; Dual 4-bit synchronous binary counter | Philips |
| 164536 | 74HC4520U | Dual 4-bit synchronous binary counter | Philips |
| 164537 | 74HC4538 | Dual Precision Monostable Multivibrator(Retriggerable, Resettable) | Motorola |
| 164538 | 74HC4538 | Dual Precision Monostable Multivibrator(Retriggerable / Resettable) | ON Semiconductor |
| 164539 | 74HC4538 | Dual retriggerable precision monostable multivibrator | Philips |
|
| 164540 | 74HC4538 | DUAL RETRIGGERABLE MONOSTABLE MULTIVIBRATOR | ST Microelectronics |
| 164541 | 74HC4538 | High Speed CMOS Logic Dual Retriggerable Precision Monostable Multivibrator | Texas Instruments |
| 164542 | 74HC4538D | Dual retriggerable precision monostable multivibrator | Nexperia |
| 164543 | 74HC4538D | Dual retriggerable precision monostable multivibrator | NXP Semiconductors |
| 164544 | 74HC4538D | 74HC/HCT4538; Dual retriggerable precision monostable multivibrator | Philips |
| 164545 | 74HC4538D-Q100 | Dual retriggerable precision monostable multivibrator | Nexperia |
| 164546 | 74HC4538D-Q100 | Dual retriggerable precision monostable multivibrator | NXP Semiconductors |
| 164547 | 74HC4538DB | Dual retriggerable precision monostable multivibrator | Nexperia |
| 164548 | 74HC4538DB | Dual retriggerable precision monostable multivibrator | NXP Semiconductors |
| 164549 | 74HC4538DB | 74HC/HCT4538; Dual retriggerable precision monostable multivibrator | Philips |
| 164550 | 74HC4538N | Dual retriggerable precision monostable multivibrator | NXP Semiconductors |
| 164551 | 74HC4538N | 74HC/HCT4538; Dual retriggerable precision monostable multivibrator | Philips |
| 164552 | 74HC4538PW | Dual retriggerable precision monostable multivibrator | Nexperia |
| 164553 | 74HC4538PW | Dual retriggerable precision monostable multivibrator | NXP Semiconductors |
| 164554 | 74HC4538PW | 74HC/HCT4538; Dual retriggerable precision monostable multivibrator | Philips |
| 164555 | 74HC4538PW-Q100 | Dual retriggerable precision monostable multivibrator | Nexperia |
| 164556 | 74HC4538PW-Q100 | Dual retriggerable precision monostable multivibrator | NXP Semiconductors |
| 164557 | 74HC4538U | 74HC/HCT4538; Dual retriggerable precision monostable multivibrator | Philips |
| 164558 | 74HC4543 | BCD to 7-segment latch/decoder/driver for LCDs | Philips |
| 164559 | 74HC4851BQ | 8-channel analog multiplexer/demultiplexer with injection-current effect control | Nexperia |
| 164560 | 74HC4851BQ | 8-channel analog multiplexer/demultiplexer with injection-current effect control | NXP Semiconductors |
