| Manufacturer | Part # | Datasheet | Description |
 NXP Semiconductors |
HEF4522BD
|
107Kb/10P |
Programmable 4-bit BCD down counter
January 1995 |
|
HEF4522BF
|
107Kb/10P |
Programmable 4-bit BCD down counter
January 1995 |
|
HEF4522BN
|
107Kb/10P |
Programmable 4-bit BCD down counter
January 1995 |
|
HEF4522BP
|
107Kb/10P |
Programmable 4-bit BCD down counter
January 1995 |
|
HEF4522BT
|
107Kb/10P |
Programmable 4-bit BCD down counter
January 1995 |
|
HEF4520B
|
64Kb/7P |
Dual binary counter
January 1995 |
 Nexperia B.V. All right... |
HEF4520B
|
219Kb/12P |
Dual binary counter
Rev. 8 - 1 March 2022 |
 NXP Semiconductors |
HEF4520B
|
159Kb/14P |
Tolerant of slow clock rise and fall times
Rev. 6-18 November 2011 |
 Nexperia B.V. All right... |
HEF4520B-Q100
|
184Kb/14P |
Dual binary counter
|
 NXP Semiconductors |
HEF4520BD
|
64Kb/7P |
Dual binary counter
January 1995 |
|
HEF4520BF
|
64Kb/7P |
Dual binary counter
January 1995 |
|
HEF4520BN
|
64Kb/7P |
Dual binary counter
January 1995 |
|
HEF4520BP
|
64Kb/7P |
Dual binary counter
January 1995 |
|
HEF4520BP
|
159Kb/14P |
Tolerant of slow clock rise and fall times
Rev. 6-18 November 2011 |
|
HEF4520BT
|
64Kb/7P |
Dual binary counter
January 1995 |
|
HEF4520BT
|
159Kb/14P |
Tolerant of slow clock rise and fall times
Rev. 6-18 November 2011 |
 Nexperia B.V. All right... |
HEF4520BT
|
219Kb/12P |
Dual binary counter
Rev. 8 - 1 March 2022 |
 NXP Semiconductors |
HEF4520BT-653
|
159Kb/14P |
Tolerant of slow clock rise and fall times
Rev. 6-18 November 2011 |
|
HEF4521B
|
159Kb/11P |
24-stage frequency divider and oscillator
January 1995 |
 Nexperia B.V. All right... |
HEF4521B
|
266Kb/15P |
24-stage frequency divider and oscillator
3 December 2021 |