TC74VHC299F/FT
TOSHIBA CMOS Digital Integrated Circuit
Silicon Monolithic
TC74VHC299F,TC74VHC299FT
8-Bit Pipo Shift Register with Asynchronous Clear
The TC74VHC299 is an advanced high speed CMOS 8-BIT
PIPO SHIFT REGISTER fabricated with silicon gate C
2
MOS
technology.
It achieves the high speed operation similar to equivalent
Bipolar Schottky TTL while maintaining the CMOS low power
dissipation.
It has a four modes (HOLD, SHIFT LEFT, SHIFT RIGHT and
LOAD DATA) controlled by the two selection inputs (S0, S1).
When one or both enable (
G1
,
G2
) are high, the eight I/O are
forced to the high-impedance state; however, sequential
operation or clearing of the register is not affected.
All inputs are equipped with protection circuits against static
discharge.
TC74VHC299F
TC74VHC299FT
Features (Note 1) (Note 2) (Note 3)
•
•
•
•
•
•
•
High speed: f
max
= 160 MHz (typ.) at V
CC
= 5 V
Low power dissipation: I
CC
= 4
μA
(max) at Ta = 25°C
High noise immunity: V
NIH
= V
NIL
= 28% V
CC
(min)
Balanced propagation delays: t
pLH
∼
t
pHL
−
Wide operating voltage range: V
CC (opr)
= 2 to 5.5 V
Low noise: V
OLP
= 1.4 V (max)
Pin and function compatible with 74ALS299
Weight
SOP20-P-300-1.27A
TSSOP20-P-0044-0.65A
: 0.22 g (typ.)
: 0.08 g (typ.)
Note 1: Do not apply a signal to A/QA to H/QH bus terminal when it is in the output mode. Damage may result.
Note 2: All floating (high impedance) A/QA to H/QH bus terminals must have their input levels fixed by means of pull
up or pull down resistors.
Note 3: A parasitic diode is formed between A/QA to H/QH bus and V
CC
terminals. Therefore bus terminal can not
be used to interface 5 V to 3 V systems directly.
1
2007-10-01
TC74VHC299F/FT
Pin Assignment
IEC Logic Symbol
CLR
G1
G2
S0
S1
CK
SR
A/QA
B/QB
C/QC
D/QD
E/QE
F/QF
GND 10
(top view)
11
SR
G/QG
H/QH
SL
(9)
(2)
(3)
(1)
(19)
(12)
(11)
(7)
(13)
(6)
(14)
(5)
(15)
(4)
(16)
(18)
R
&
0
1
SRG 8
3 EN 13
M
0
3
S0
1
2
3
4
5
6
7
8
9
20
19
18
17
16
15
14
13
12
V
CC
S1
SL
QH’
H/QH
F/QF
D/QD
B/QB
CK
G1
G2
G/QG
E/QE
C/QC
A/QA
QA’
CLR
C4/1→/2←
1, 4D
3, 4D
5, 13
3, 4D
6, 13
(8)
Z5
Z6
QA’
3, 4D
12, 13
2, 4D
Z12
(17)
QH’
Truth Table
Inputs
Mode
Function
Select
Output Control
Serial
Inputs
/Outputs
Outputs
CLR
S1
Z
Clear
Hold
Shift Right
L
L
L
H
H
H
H
H
H
H
L
X
L
L
L
H
H
H
S0
H
X
L
L
H
H
L
L
H
G1
(Note)
X
L
L
L
L
L
L
L
X
G2
(Note)
X
L
L
L
L
L
L
L
X
CK
SL
X
X
X
X
X
X
X
X
X
X
H
L
X
SR
X
X
X
X
H
L
X
X
X
A/QA
H/QH
QA’
QH’
Z
L
L
QA
0
H
L
QB
n
QB
n
a
Z
L
L
QH
0
QG
n
QG
n
H
L
h
L
L
L
QA
0
H
L
QB
n
QB
n
a
L
L
L
QH
0
QG
n
QG
n
H
L
h
Shift Left
Load
Note:
When one or both output controls are high, the eight input/output terminals are in the high-impedance state;
however sequential or clearing of the register is not affected.
Z: High impedance
Q
n0
: The level of Q
n
before the indicated steady-state input conditions were established.
Q
nn
: The level of Q
n
before the most recent active transition indicated by
↓
or
↑.
a, h: The level of the steady-state inputs A, H, respectively.
X: Don’t care.
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2007-10-01
TC74VHC299F/FT
Absolute Maximum Ratings (Note)
Characteristics
Supply voltage range
DC input voltage
DC bus I/O voltage
(A/QA to H/QH’)
DC output voltage
(QA’ to QH’)
Input diode current
Output diode current
DC output current
DC V
CC
/ground current
Power dissipation
Storage temperature
Symbol
V
CC
V
IN
V
IN/OUT
Rating
−0.5
to 7.0
−0.5
to 7.0
−0.5
to V
CC
+
0.5
−0.5
to V
CC
+
0.5
−20
±20
±25
±80
180
−65
to 150
Unit
V
V
V
V
OUT
I
IK
I
OK
I
OUT
I
CC
P
D
T
stg
V
mA
mA
mA
mA
mW
°C
Note:
Exceeding any of the absolute maximum ratings, even briefly, lead to deterioration in IC performance or
even destruction.
Using continuously under heavy loads (e.g. the application of high temperature/current/voltage and the
significant change in temperature, etc.) may cause this product to decrease in the reliability significantly
even if the operating conditions (i.e. operating temperature/current/voltage, etc.) are within the absolute
maximum ratings and the operating ranges.
Please design the appropriate reliability upon reviewing the Toshiba Semiconductor Reliability Handbook
(“Handling Precautions”/“Derating Concept and Methods”) and individual reliability data (i.e. reliability test
report and estimated failure rate, etc).
Operating Ranges (Note)
Characteristics
Supply voltage
Input voltage
DC bus I/O voltage
(A/QA to H/QH)
DC output voltage
(QA’ to QH’)
Operating temperature
Input rise and fall time
Symbol
V
CC
V
IN
V
IN/OUT
Rating
2.0 to 5.5
0 to 5.5
0 to V
CC
Unit
V
V
V
V
OUT
T
opr
dt/dV
0 to V
CC
−40
to 85
0 to 100 (V
CC
= 3.3 ± 0.3 V)
0 to 20 (V
CC
= 5 ± 0.5 V)
V
°C
ns/V
Note:
The operating ranges must be maintained to ensure the normal operation of the device.
Unused inputs must be tied to either VCC or GND.
5
2007-10-01
PCB Design
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