74hc590bq NXP Semiconductors, 74hc590bq Datasheet
74hc590bq
Manufacturer Part Number
74hc590bq
Description
74hc590 8-bit Binary Counter With Output Register; 3-state
Manufacturer
NXP Semiconductors
Datasheet
1.74HC590BQ.pdf
(25 pages)
1. General description
2. Features
3. Quick reference data
The 74HC590 is a high-speed Si-gate CMOS device and is pin compatible with Low
power Schottky TTL (LSTTL). It is specified in compliance with JEDEC standard no. 7A.
The 74HC590 is an 8-bit binary counter with a storage register and 3-state outputs. The
storage register has parallel (Q0 to Q7) outputs. The binary counter features a master
reset counter (MRC) and count enable (CE) inputs. The counter and storage register have
separate positive edge triggered clock (CPC and CPR) inputs. If both clocks are
connected together, the counter state always is one count ahead of the register. Internal
circuitry prevents clocking from the clock enable. A ripple carry output (RCO) is provided
for cascading. Cascading is accomplished by connecting RCO of the first stage to CE of
the second stage. Cascading for larger count chains can be accomplished by connecting
RCO of each stage to the counter clock (CPC) input of the following stage. If both clocks
are connected together, the counter state always is one count ahead of the register.
Table 1:
GND = 0 V; T
Symbol
t
t
t
PHL
PLH
PZH
74HC590
8-bit binary counter with output register; 3-state
Rev. 01 — 30 March 2005
Counter and register have independent clock inputs
Counter has master reset
Complies with JEDEC standard no. 7A
Multiple package options
ESD protection:
Specified from 40 C to +80 C and from 40 C to +125 C
, t
, t
PLH
PZL
HBM EIA/JESD22-A114-B exceeds 2000 V
MM EIA/JESD22-A115-A exceeds 200 V
CDM EIA/JESD22-C101C exceeds 2000 V
Parameter
propagation delay CPC to
RCO
propagation delay CPR to
Qn
propagation delay MRC to
RCO
3-state output enable time
OE to Qn
Quick reference data
amb
= 25 C; t
r
= t
f
= 6 ns
Conditions
C
C
C
C
L
L
L
L
= 50 pF; V
= 50 pF; V
= 50 pF; V
= 50 pF; V
CC
CC
CC
CC
= 4.5 V
= 4.5 V
= 4.5 V
= 4.5 V
Product data sheet
Min
-
-
-
-
Typ
19
17
18
13
Max Unit
-
-
-
-
ns
ns
ns
ns
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