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IC Internal Diagram
7. IC Internal Diagram
7-1 74LV245 ; SIC6
Philips Semiconductors
Octal bus transceiver (3-State)
FEATURES
•
Wide operating voltage: 1.0 to 5.5 V
•
Optimized for low voltage applications: 1.0 to 3.6 V
•
Accepts TTL input levels between V
•
Typical V
(output ground bounce) < 0.8 V at V
OLP
T
= 25°C
amb
•
Typical V
(output V
OHV
T
= 25°C
amb
•
Output capability: bus driver
•
I
category: MSI
CC
QUICK REFERENCE DATA
GND = 0 V; T
= 25°C; t
amb
SYMBOL
Propagation delay
t
/t
PHL
PLH
A
to B
n
C
Input capacitance
I
C
Input/output capacitance
I/O
C
Power dissipation capacitance per buffer
PD
NOTE:
1. C
is used to determine the dynamic power dissipation (P
PD
P
= C
V
D
PD
f
= input frequency in MHz; C
i
f
= output frequency in MHz; V
o
2
(C
V
L
CC
ORDERING INFORMATION
PACKAGES
20-Pin Plastic DIL
20-Pin Plastic SO
20-Pin Plastic SSOP Type II
20-Pin Plastic TSSOP Type I
PIN DESCRIPTION
PIN NUMBER
1
2, 3, 4, 5,
6, 7, 8, 9
10
18, 17, 16, 15,
14, 13, 12, 11
19
20
1998 Apr 20
Samsung Electronics
= 2.7 V and V
CC
CC
undershoot) > 2 V at V
OH
CC
≤ 2.5 ns
= t
r
f
PARAMETER
; B
to A
n
n
n
2
) (C
2
f
V
f
) where:
CC
i
L
CC
o
= output load capacitance in pF;
L
= supply voltage in V;
CC
f
) = sum of the outputs.
o
TEMPERATURE RANGE
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
SYMBOL
FUNCTION
DIR
Direction
A
to A
Data inputs/outputs
0
7
GND
Ground (0 V)
B
to B
Data inputs/outputs
0
7
OE
Output enable input (active LOW)
V
Positive supply voltage
CC
DESCRIPTION
The 74LV245 is a low-voltage Si-gate CMOS device and is pin and
function compatible with 74HC/HCT245.
The 74LV245 is an octal transceiver featuring non-inverting 3-State
= 3.6 V
bus compatible outputs in both send and receive directions. The
CC
74LV245 features an output enable (OE) input for easy cascading
= 3.3 V,
and a send/receive (DIR) input for direction control. OE controls the
outputs so that the buses are effectively isolated.
= 3.3 V,
CONDITIONS
C
= 15 pF;
L
V
= 3.3 V
CC
V
= 3.3 V
CC
V
= GND to V
, note 1
I
CC
in µW)
D
OUTSIDE NORTH AMERICA
74LV245 N
74LV245 D
74LV245 DB
74LV245 PW
FUNCTION TABLE
INPUTS
OE
L
L
H
NOTES:
H =
HIGH voltage level
L =
LOW voltage level
X =
don't care
Z =
high impedance OFF-state
2
Product specification
74LV245
TYPICAL
UNIT
7.0
ns
3.5
pF
10
pF
40
pF
NORTH AMERICA
PKG. DWG. #
74LV245 N
SOT146-1
74LV245 D
SOT163-1
74LV245 DB
SOT339-1
74LV245PW DH
SOT360-1
INPUTS/OUTPUT
DIR
A
B
n
L
A = B
Inputs
H
Inputs
B = A
X
Z
Z
853–1931 19258
n
7-1
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