The 74HC4094; 74HCT4094 is an 8-bit serial-in/serial or parallel-out shift register with a
storage register and 3-state outputs. Both the shift and storage register have separate
clocks. The device features a serial input (D) and two serial outputs (QS1 and QS2) to
enable cascading. Data is shifted on the L OW-to-HIGH transitions of the CP input. Data is
available at QS1 on the LOW-to-HIGH transitions of the CP input to allow cascading when
clock edges are fast. The same data is available at QS2 on the next HIGH-to-LOW
transition of the CP input to allow cascading when clock edges are slow. The data in the
shift register is transferred to the storage register when the STR input is HIGH. Dat a in the
storage register appears at the outputs whenever th e output ena ble input (OE) is HIGH. A
LOW on OE causes the outputs to assume a high-impedance OFF-state. Ope ration of the
OE input does not affect the state of the registers. Inputs include clamp diodes. This
enables the use of current limiting resistors to interface inputs to voltages in excess of
V
.
CC
2. Features and benefits
Complies with JEDEC standard JESD7A
Input levels:
LXXZZQ6SNC
LXXZZNCQ7S
HLXNCNCQ6SNC
HHLLQPn 1Q6SNC
HHHHQPn 1Q6SNC
H H H NCNCNCQ7S
[1] At the positive clock edge, the information in the 7th register stage is transferred to the 8th register stage and the QSn outputs.
H = HIGH voltage level; L = LOW voltage level; X = don’t care;
= positive-going transition; = negative-going transition;
Z = HIGH-impedance OFF-state; NC = no change;
Q6S = the data in register stage 6 before the LOW to HIGH clock transition;
Q7S = the data in register stage 7 before the HIGH to LOW clock transition.
Product data sheetRev. 6 — 31 December 2012 5 of 23
Page 6
NXP Semiconductors
8. Limiting values
74HC4094; 74HCT4094
8-stage shift-and-store bus register
Table 4.Limiting values
In accordance with the Absolute Maximum Rating System (IEC 60134). Voltages are referenced to GND (ground = 0 V).
SymbolParameterConditionsMinMaxUnit
V
CC
I
IK
I
OK
I
O
I
CC
I
GND
T
stg
P
tot
[1] For DIP16 package: P
[2] For SO16: P
For SSOP16 and TSSOP16 packages: P
supply voltage0.5+7V
input clamping currentVI < 0.5 V or VI>VCC+0.5 V-20mA
output clamping currentVO< 0.5 V or VO>VCC+0.5V-20mA
output currentVO = 0.5 V to (VCC+0.5V)-25mA
supply current-+50mA
ground current-50mA
storage temperature65+150C
total power dissipationDIP16 package
Product data sheetRev. 6 — 31 December 2012 7 of 23
Page 8
NXP Semiconductors
74HC4094; 74HCT4094
8-stage shift-and-store bus register
Table 6.Static characteristics
…continued
At recommended operating conditions; voltages are referenced to GND (ground = 0 V).
Symbol ParameterConditions25C40 C to +85 C 40 C to +125 C Unit
Min TypMaxMinMaxMinMax
I
I
I
OZ
input leakage
current
OFF-state
output current
VI=VCCor GND;
VCC=5.5V
VI=VIHor VIL; VCC=5.5V;
VO=VCCor GND per input
pin; other inputs at V
CC
or
--0.1-1.0-1.0A
--0.5-5.0-10A
GND; IO=0A
I
CC
supply currentVI=VCCor GND; IO=0A;
--8.0-80-160A
VCC=5.5V
I
CC
additional
supply current
VI=VCC 2.1 V;
other inputs at V
or GND;
CC
VCC= 4.5 V to 5.5 V;
IO=0A
per input pin; STR input-100360-450-490A
per input pin; OE input-150540-675-735A
per input pin; CP input-150540-675-735A
per input pin; D input-40144-180-196A
Product data sheetRev. 6 — 31 December 2012 20 of 23
Page 21
NXP Semiconductors
74HC4094; 74HCT4094
8-stage shift-and-store bus register
16. Legal information
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[1] Please consult the most recently issued document before initiating or completing a design.
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[3] The product status of device(s) d escribed i n this docu ment may have changed si nce this d ocument was p ublished and may dif fer in case of multiple devices. The latest product statu s
information is available on the Internet at URL http://www.nxp.com.
[1][2]
Product status
[3]
Definition
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Limiting values — Stress above one or more limiting values (as defined in
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Characteristics sections of this document is not warranted. Constant or
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, unless otherwise
Product data sheetRev. 6 — 31 December 2012 21 of 23
Page 22
NXP Semiconductors
74HC4094; 74HCT4094
8-stage shift-and-store bus register
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