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74HC594D
8-bit shift register with output register
General descriptionThe 74HC594; 74HCT594 is a high-speed Si-gate CMOS device and is pin compatible
with Low-Power Schottky TTL (LSTTL).
The 74HC594; 74HCT594isan 8-bit, non-inverting, serial-in, parallel-out shift register that
feeds an 8-bit D-type storage register. Separate clocks (SHCP and STCP) and direct
overriding clears (SHR and STR) are provided on both the shift and storage registers. serial output (Q7S) is provided for cascading purposes.
Both the shift and storage register clocks are positive-edge triggered.If the user wishesto
connect both clocks together, the shift register will alwaysbe one count pulse aheadof the
storage register. Features Synchronous serial input and output Complies with JEDEC standard No.7A 8-bit parallel output Shift and storage registers have independent direct clear and clocks Independent clocks for shift and storage registers 100 MHz (typical) Multiple package options Speciﬁed from −40 °Cto+85 °C and from −40°Cto +125°C Applications Serial-to parallel data conversion Remote control holding register
74HC594; 74HCT594
8-bit shift register with output register
Rev. 03 — 20 December 2006 Product data sheet
NXP Semiconductors 74HC594; 74HCT594
8-bit shift register with output register Ordering information Functional diagram
Table 1. Ordering information
74HC594D −40 °C to +125°C SO16 plastic small outline package; 16 leads;
body width 3.9 mm
SOT109-1
74HC594DB −40 °C to +125°C SSOP16 plastic shrink small outline package; 16 leads;
body width 5.3 mm
SOT338-1
74HC594N −40 °C to +125°C DIP16 plastic dual in-line package; 16 leads (300 mil) SOT38-4
74HCT594D −40 °C to +125°C SO16 plastic small outline package; 16 leads;
body width 3.9 mm
SOT109-1
74HCT594DB −40 °C to +125°C SSOP16 plastic shrink small outline package; 16 leads;
body width 5.3 mm
SOT338-1
74HCT594N −40 °C to +125°C DIP16 plastic dual in-line package; 16 leads (300 mil) SOT38-4
NXP Semiconductors 74HC594; 74HCT594
8-bit shift register with output register
NXP Semiconductors 74HC594; 74HCT594
8-bit shift register with output register Pinning information
6.1 Pinning
NXP Semiconductors 74HC594; 74HCT594
8-bit shift register with output register
6.2 Pin description
Table 2. Pin description 1 parallel data output 1 2 parallel data output 2 3 parallel data output 3 4 parallel data output 4 5 parallel data output 5 6 parallel data output 6 7 parallel data output 7
GND 8 ground (0V)
Q7S 9 serial data output
SHR 10 shift register reset (active LOW)
SHCP 11 shift register clock input
STCP 12 storage register clock input
STR 13 storage register reset (active LOW) 14 serial data input 15 parallel data output 0
VCC 16 supply voltage
NXP Semiconductors 74HC594; 74HCT594
8-bit shift register with output register Functional description
[1]H= HIGH voltage level;= LOW voltage level;= LOW-to-HIGH transition;= don’t care. Limiting values
[1] The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
[2] For DIP16 packages: above 70 °C the value of Ptot derates linearly with 12 mW/K.
For SO16 packages: above 70 °C the value of Ptot derates linearly with 8 mW/K.
For SSOP16 packages: above 60 °C the value of Ptot derates linearly with 5.5 mW/K.
Table 3. Function table[1]
Clear shift register L X X X X
Clear storage register X L X X X
Load DS into shift register stage 0, advance previous stage data to the next stage H X ↑ X H or L
Transfer shift register data to storage register and outputs Qn X H X ↑ X
Shift register one count pulse ahead of storage register H H ↑↑ X
Table 4. Limiting values
In accordance with the Absolute Maximum Rating System (IEC 60134). Voltages are referenced to GND (ground = 0 V).
VCC supply voltage −0.5 +7.0 V
IIK input clamping current VI < −0.5 V or VI >VCC+ 0.5 V [1]- ±20 mA
IOK output clamping current VO < −0.5 V or VO > VCC + 0.5V [1]- ±20 mA output current VO= −0.5 V to VCC + 0.5 V
Serial data output Q7S - ±25 mA
Parallel data output - ±35 mA
ICC supply current Serial data output Q7S - 50 mA
Parallel data output - 70 mA
IGND ground current Serial data output Q7S - −50 mA
Parallel data output - −70 mA
Tstg storage temperature −65 +150 °C
Ptot total power dissipation Tamb = −40 °C to +125°C [2]- 500 mW
NXP Semiconductors 74HC594; 74HCT594
8-bit shift register with output register Recommended operating conditions
10. Static characteristics
Table 5. Recommended operating conditions
Type 74HC594
VCC supply voltage 2.0 5.0 6.0 V input voltage 0 - VCC V output voltage 0 - VCC V
Tamb ambient temperature −40 +25 +125 °C rise time VCC = 2.0V - - 1000 ns
VCC = 4.5V - 6.0 500 ns
VCC = 6.0V - - 400 ns fall time VCC = 2.0V - - 1000 ns
VCC = 4.5V - 6.0 500 ns
VCC = 6.0V - - 400 ns
Type 74HCT594
VCC supply voltage 4.5 5.0 5.5 V input voltage 0 - VCC V output voltage 0 - VCC V
Tamb ambient temperature −40 +25 +125 °C rise time VCC = 4.5 V - 6.0 500 ns fall time VCC = 4.5 V - 6.0 500 ns
Table 6. Static characteristics type 74HC594
At recommended operating conditions; voltages are referenced to GND (ground = 0 V).
Tamb = 25°C
VIH HIGH-level input voltage VCC = 2.0 V 1.5 1.2 - V
VCC = 4.5 V 3.15 2.4 - V
VCC = 6.0 V 4.2 3.2 - V
VIL LOW-level input voltage VCC = 2.0 V - 0.8 0.5 V
VCC = 4.5 V - 2.1 1.35 V
VCC = 6.0 V - 2.8 1.8 V
VOH HIGH-level output voltage VI = VIH or VIL
Serial data output Q7S
IO = −4.0 mA; VCC = 4.5V 3.98 4.32 - V
IO = −5.2 mA; VCC = 6.0V 5.48 5.81 - V
Parallel data outputs
IO = −6.0 mA; VCC = 4.5V 3.98 4.32 - V
IO = −7.8 mA; VCC = 6.0V 5.48 5.81 - V
NXP Semiconductors 74HC594; 74HCT594
8-bit shift register with output register
VOL LOW-level output voltage VI = VIH or VIL
Serial data output Q7S
IO = 4.0 mA; VCC = 4.5V - 0.15 0.26 V
IO = 5.2 mA; VCC = 6.0V - 0.16 0.26 V
Parallel data outputs
IO = 6.0 mA; VCC = 4.5V - 0.15 0.26 V
IO = 7.8 mA; VCC = 6.0V - 0.16 0.26 V input leakage current VI =VCCor GND; VCC= 6.0V - - ±0.1 μA
ICC supply current VI = VCC or GND; IO = 0A;
VCC= 6.0V - 8.0 μA input capacitance - 3.5 - pF
Tamb = −40 °C to +85°C
VIH HIGH-level input voltage VCC = 2.0 V 1.5 - - V
VCC = 4.5 V 3.15 - - V
VCC = 6.0 V 4.2 - - V
VIL LOW-level input voltage VCC = 2.0 V - - 0.5 V
VCC = 4.5 V - - 1.35 V
VCC = 6.0 V - - 1.8 V
VOH HIGH-level output voltage VI = VIH or VIL
Serial data output Q7S
IO = −4.0 mA; VCC = 4.5V 3.84 - - V
IO = −5.2 mA; VCC = 6.0V 5.34 - - V
Parallel data outputs
IO = −6.0 mA; VCC = 4.5V 3.84 - - V
IO = −7.8 mA; VCC = 6.0V 5.34 - - V
VOL LOW-level output voltage VI = VIH or VIL
Serial data output Q7S
IO = 4.0 mA; VCC = 4.5V - - 0.33 V
IO = 5.2 mA; VCC = 6.0V - - 0.33 V
Parallel data outputs
IO = 6.0 mA; VCC = 4.5V - - 0.33 V
IO = 7.8 mA; VCC = 6.0V - - 0.33 V input leakage current VI =VCCor GND; VCC= 6.0V - - ±1.0 μA
ICC supply current VI = VCC or GND; IO = 0A;
VCC= 6.0V
--80 μA
Tamb = −40 °C to +125°C
VIH HIGH-level input voltage VCC = 2.0 V 1.5 - - V
VCC = 4.5 V 3.15 - - V
VCC = 6.0 V 4.2 - - V
Table 6. Static characteristics type 74HC594 …continued
At recommended operating conditions; voltages are referenced to GND (ground = 0 V).
NXP Semiconductors 74HC594; 74HCT594
8-bit shift register with output register
VIL LOW-level input voltage VCC = 2.0 V - - 0.5 V
VCC = 4.5 V - - 1.35 V
VCC = 6.0 V - - 1.8 V
VOH HIGH-level output voltage VI = VIH or VIL
Serial data output Q7S
IO = −4.0 mA; VCC = 4.5V 3.7 - - V
IO = −5.2 mA; VCC = 6.0V 5.2 - - V
Parallel data outputs
IO = −6.0 mA; VCC = 4.5V 3.7 - - V
IO = −7.8 mA; VCC = 6.0V 5.2 - - V
VOL LOW-level output voltage VI = VIH or VIL
Serial data output Q7S
IO = 4.0 mA; VCC = 4.5V - - 0.4 V
IO = 5.2 mA; VCC = 6.0V - - 0.4 V
Parallel data outputs
IO = 6.0 mA; VCC = 4.5V - - 0.4 V
IO = 7.8 mA; VCC = 6.0V - - 0.4 V input leakage current VI =VCCor GND; VCC= 6.0V - - ±1.0 μA
ICC supply current VI = VCC or GND; IO = 0A;
VCC= 6.0V - 160 μA
Table 6. Static characteristics type 74HC594 …continued
At recommended operating conditions; voltages are referenced to GND (ground = 0 V).
NXP Semiconductors 74HC594; 74HCT594
8-bit shift register with output register
Table 7. Static characteristics type 74HCT594
At recommended operating conditions; voltages are referenced to GND (ground = 0 V).
Tamb = 25°C
VIH HIGH-level input voltage VCC = 4.5 V to 5.5 V 2.0 1.6 - V
VIL LOW-level input voltage VCC = 4.5 V to 5.5 V - 1.2 0.8 V
VOH HIGH-level output voltage VI = VIH or VIL
Serial data output Q7S
IO = −4.0 mA; VCC = 4.5V 3.98 4.32 - V
Parallel data outputs
IO = −6.0 mA; VCC = 4.5V 3.98 4.32 - V
VOL LOW-level output voltage VI = VIH or VIL
Serial data output Q7S
IO = 4.0 mA; VCC = 4.5V - 0.15 0.26 V
Parallel data outputs
IO = 6.0 mA; VCC = 4.5V - 0.16 0.26 V input leakage current VI =VCCor GND; VCC= 5.5V - - ±0.1 μA
ICC supply current VI = VCC or GND; IO = 0A;
VCC= 5.5V - 8.0 μA
ΔICC additional supply current per input pin; VI =VCC − 2.1 V and
other inputs at VCCor GND;=0 A; VCC= 4.5Vto 5.5V
pins SHR, SHCP , STCP, STR - 150 540 μA
pin DS - 25 90 μA input capacitance - 3.5 - pF
Tamb = −40 °C to +85°C
VIH HIGH-level input voltage VCC = 4.5 V to 5.5 V 2.0 - - V
VIL LOW-level input voltage VCC = 4.5 V to 5.5 V - - 0.8 V
VOH HIGH-level output voltage VI = VIH or VIL
Serial data output Q7S
IO = −4.0 mA; VCC = 4.5V 3.84 - - V
Parallel data outputs
IO = −6.0 mA; VCC = 4.5V 3.84 - - V
VOL LOW-level output voltage VI = VIH or VIL
Serial data output
IO = 4.0 mA; VCC = 4.5V - - 0.33 V
Parallel data outputs
IO = 6.0 mA; VCC = 4.5V - - 0.33 V input leakage current VI =VCCor GND; VCC= 5.5V - - ±1.0 μA
ICC supply current VI = VCC or GND; IO = 0A;
VCC= 5.5V
--80 μA
NXP Semiconductors 74HC594; 74HCT594
8-bit shift register with output register
ΔICC additional supply current per input pin; VI =VCC − 2.1 V and
other inputs at VCCor GND;=0 A; VCC= 4.5Vto 5.5V
pins SHR, SHCP , STCP, STR - - 675 μA
pin DS - - 112.5 μA
Tamb = −40 °C to +125°C
VIH HIGH-level input voltage VCC = 4.5 V to 5.5 V 2.0 - - V
VIL LOW-level input voltage VCC = 4.5 V to 5.5 V - - 0.8 V
VOH HIGH-level output voltage VI = VIH or VIL
Serial data output Q7S
IO = −4.0 mA; VCC = 4.5V 3.7 - - V
Parallel data outputs
IO = −6.0 mA; VCC = 4.5V 3.7 - - V
VOL LOW-level output voltage VI = VIH or VIL
Serial data output Q7S
IO = 4.0 mA; VCC = 4.5V - - 0.4 V
Parallel data outputs
IO = 6.0 mA; VCC = 4.5V - - 0.4 V input leakage current VI =VCCor GND; VCC= 5.5V - - ±1.0 μA
ICC supply current VI = VCC or GND; IO = 0A;
VCC= 5.5V - 160 μA
ΔICC additional supply current per input pin; VI =VCC − 2.1 V and
other inputs at VCCor GND;=0 A; VCC= 4.5Vto 5.5V
pins SHR, SHCP , STCP, STR - - 735 μA
pin DS - - 122.5 μA
Table 7. Static characteristics type 74HCT594 …continued
At recommended operating conditions; voltages are referenced to GND (ground = 0 V).
NXP Semiconductors 74HC594; 74HCT594
8-bit shift register with output register
11. Dynamic characteristics
Table 8. Dynamic characteristics type 74HC594
GND = 0 V; tr = tf = 6 ns; CL = 50 pF; see Figure 15.
tpd propagation
delay
SHCP to Q7S;
see Figure9
[1]
VCC = 2.0 V - 44 150 - 185 - 225 ns
VCC = 4.5 V - 16 30 - 37 - 45 ns
VCC = 5.0 V;
CL = 15pF
-13 - - - - - ns
VCC = 6.0 V - 14 26 - 31 - 38 ns
STCPto Qn; see
Figure10
VCC = 2.0 V - 44 150 - 185 - 225 ns
VCC = 4.5 V - 16 30 - 37 - 45 ns
VCC = 5.0 V;
CL = 15pF
-13 - - - - - ns
VCC = 6.0 V - 14 26 - 31 - 38 ns
tPHL HIGH to
LOW
propagation
delay
SHRto Q7S; see
Figure13
VCC = 2.0 V - 39 150 - 185 - 225 ns
VCC = 4.5 V - 14 30 - 37 - 45 ns
VCC = 5.0 V;
CL = 15pF
-11 - - - - - ns
VCC = 6.0 V - 12 26 - 31 - 38 ns
STR to Qn; see
Figure14
VCC = 2.0 V - 39 125 - 155 - 185 ns
VCC = 4.5 V - 14 25 - 31 - 37 ns
VCC = 5.0 V;
CL = 15pF
-11 - - - - - ns
VCC = 6.0 V - 12 21 - 26 - 31 ns
tTHL HIGH to
LOW output
transition
time
see Figure9
Serial data output Q7S
VCC = 2.0 V - 19 75 - 95 - 110 ns
VCC = 4.5 V - 7 15 - 19 - 22 ns
VCC = 6.0 V - 6 13 - 16 - 19 ns
Parallel data outputs
VCC = 2.0 V - 14 60 - 75 - 90 ns
VCC = 4.5 V - 5 12 - 15 - 18 ns
VCC = 6.0 V - 4 10 - 13 - 15 ns
NXP Semiconductors 74HC594; 74HCT594
8-bit shift register with output register
tTLH LOW to
HIGH output
transition
time
see Figure9
Serial data output Q7S
VCC = 2.0 V - 19 75 - 95 - 110 ns
VCC = 4.5 V - 7 15 - 19 - 22 ns
VCC = 6.0 V - 6 13 - 16 - 19 ns
Parallel data outputs
VCC = 2.0 V - 14 60 - 75 - 90 ns
VCC = 4.5 V - 5 12 - 15 - 18 ns
VCC = 6.0 V - 4 10 - 13 - 15 ns pulse width SHCP (HIGH or
LOW); see
Figure9
VCC = 2.0 V 80 10 - 100 - 120 - ns
VCC = 4.5 V 16 4 - 20 - 24 - ns
VCC = 6.0 V 14 3 - 17 - 20 - ns
STCP (HIGH or
LOW); see
Figure10
VCC = 2.0 V 80 10 - 100 - 120 - ns
VCC = 4.5 V 16 4 - 20 - 24 - ns
VCC = 6.0 V 14 3 - 17 - 20 - ns
SHR and STR
(HIGH or LOW);
see Figure13
and Figure14
VCC = 2.0 V 80 14 - 100 - 120 - ns
VCC = 4.5 V 16 5 - 20 - 24 - ns
VCC = 6.0 V 14 4 - 17 - 20 - ns
Table 8. Dynamic characteristics type 74HC594 …continued
GND = 0 V; tr = tf = 6 ns; CL = 50 pF; see Figure 15.

Partno	Mfg	Dc	Qty	Available	Descript
74HC594D	TI	N/a	75	avai	8-bit shift register with output register