
1/11July 2003
■ 3.6V TOLERANT INPUTS A N D OUTPUTS
■ HIGH SPEED:
t
PD
= 2.5 ns (MAX.) at VCC=3.0to3.6V
t
PD
= 3.2 ns (MAX.) at VCC=2.3to2.7V
■ POWER DOWN PROTECTION ON INPUTS
AND OUTPUTS
■ SYMMETRICAL OUTPUT IMPEDANCE:
|I
OH
|=IOL= 24mA (MIN) at VCC=3.0V
|I
OH
|=IOL= 18mA (MIN) at VCC=2.3V
■ OPERATING VOLTAGE RANGE:
V
CC
(OPR) = 1.8V to 3.6V
■ PIN AND FUNCTION COMPATIBLE WITH
74 SERIES H16245
■ BUSHOLDPROVIDEDONBOTHSIDES
■ LATCH-UP PERFORMANCE EXCEEDS
300mA (JESD 17)
■ ESD PERFORMANCE:
HBM > 2 000V (MIL STD 883 method 3015);
MM > 200V
DESCRIPTION
The 74VCXH16245 is a low voltage CMOS 16 BIT
BUS TRANSCEIVER (3-STATE) fabricated with
sub-micron silicon gate and five-layer metal wiring
C
2
MOS technology. It is ideal f or low power and
very high speed 2.3 to 3.6V applications; it can be
interfaced to 3.6V signal environment for both
inputs and outputs.
This IC is intended for two-way asynchronous
communication between data buses; the direction
of data transm ission is determined by DIR input.
The t wo enable inputs nG
canbeusedtodisable
the device so that the buses are effectively
isolated.
Bus hold on data inputs is provided in order to
eliminate the need for exte rnal pull-up or
pull-down resistor.
All inputs and outputs are equipped with
protection circuits against stat ic discharge, giving
them 2KV ESD immunity and transient excess
voltage.
All floating bus terminals during High Z State must
be held HIGH or LOW.
74VCXH16245
LOW VOLTAGE CMOS 16-BIT BUS TRANSCEIVER
(3-STATE) WITH 3.6V TOLERANT INPUTS AND OUTPUTS
ORDER CODES
PACKAGE TUBE T & R
TSSOP 74VCXH16245TTR
TSSOP
PIN CONNECTION

74VCXH16245
2/11
INPUT AND OUTPUT EQUIVALENT CIRCUIT
PIN DESCRIPTION
TRUTH TABLE
X :Don‘t Care
Z : High Impedance
IEC L OGIC SYMBOLS
PIN No SYMBOL NAME AND FUNCTION
1 1DIR Directional Control
2, 3, 5, 6, 8, 9,
11, 12
1B1 to 1B8 Data Inputs/Outputs
13,14,16,17,
19, 20, 22, 23
2B1 to 2B8 Data Inputs/Outputs
24 2DIR Directional Control
25 2G
Output Enable Input
36,35,33,32,
30, 29, 27, 26
2A1 to 2A8 Data Inputs/Outputs
47,46,44,43,
41, 40, 38, 38
1A1 to 1A8 Data Inputs/Outputs
48 1G
Output Enable Input
4, 10, 15, 21,
28, 34, 39, 45
GND Ground (0V)
7, 18, 31, 42
V
CC
Positive Supply Voltage
INPUTS FUNCTION OUTPUT
G
DIR A BUS B BUS Yn
L L OUTPUT INPUT A = B
L H INPUT OUTPUT B = A
HXZZZ

74VCXH16245
3/11
ABSOLUTE MAXIMUM RATINGS
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is
not implied
1) I
O
absolute maximum rating must be observed
2) V
O
<GND,VO>V
CC
RECOMMENDED OPERATING CONDITIONS
1) VINfrom0.8V to 2V at VCC=3.0V
Symbol Parameter Value Unit
V
CC
Supply Voltage
-0.5 to +4.6 V
V
I
DC Input Voltage
-0.5 to +4.6 V
V
O
DC Output Voltage (OFF State)
-0.5 to +4.6 V
V
O
DC Output Voltage (High or Low State) (note 1) -0.5 to VCC+ 0.5
V
I
IK
DC Input Diode Current
-50 mA
I
OK
DC Output Diode Current (note 2)
-50 mA
I
O
DC Output Current
± 50 mA
I
CC
or I
GND
DC VCCor Ground Current per Supply Pin
± 100 mA
P
D
Power Dissipation
400 mW
T
stg
Storage Temperature
-65 to +150 °C
T
L
Lead Temperature (10 sec)
300 °C
Symbol Parameter Value Unit
V
CC
Supply Voltage
2.3 to 3.6 V
V
I
Input Voltage
-0.3 to 3.6 V
V
O
Output Voltage (OFF State)
0 to 3.6 V
V
O
Output Voltage (High or Low State) 0 to V
CC
V
I
OH,IOL
High or Low Level Output Current (VCC= 3.0 to 3.6V)
± 24 mA
I
OH,IOL
High or Low Level Output Current (VCC= 2.3 to 2.7V)
± 18 mA
T
op
Operating Temperature
-55 to 125 °C
dt/dv Input Rise and Fall Time (note 1) 0 to 10 ns/V

74VCXH16245
4/11
DC SPECIFICATIONS (2.7V < VCC< 3.6V unless oth erwise s pecified)
Symbol Parameter
Test Condition Value
Unit
V
CC
(V)
-40to85°C -55to125°C
Min. Max. Min. Max.
V
IH
High Level Input
Voltage
2.7to3.6
2.0 2.0
V
V
IL
Low Level Input
Voltage
0.8 0.8
V
OH
High Level Output
Voltage
2.7to3.6
IO=-100 µAVCC-0.2 VCC-0.2
V
2.7
I
O
=-12 mA
2.2 2.2
3.0
I
O
=-18 mA
2.4 2.4
I
O
=-24 mA
2.2 2.2
V
OL
Low Level Output
Voltage
2.7to3.6
IO=100 µA
0.2 0.2
V
2.7
I
O
=12 mA
0.4 0.4
3.0
I
O
=18 mA
0.4 0.4
I
O
=24 mA
0.55 0.55
I
I
Input Leakage
Current
2.7to3.6
V
I
= 0 to 3.6V
± 5 ± 5 µA
I
I(HOLD)
Input Hold Current
3.0
VI= 0.8V
75 75
µA
V
I
=2V
-75 -75
3.6
V
I
= 0 to 3.6V
± 500 ± 500
I
off
Power Off Leakage
Current
0
V
I
or VO= 0 to 3.6V
10 10 µA
I
OZ
High Impedance
Output Leakage
Current
2.7to3.6
V
I=VIH
or V
IL
VO= 0 to 3.6V
± 10 ± 10 µA
I
CC
Quiescent Supply
Current
2.7to3.6
V
I=VCC
or GND
20 20
µA
V
I
or VO=VCCto
3.6V
± 20 ± 20
∆I
CC
ICCincr. per Input
2.7to3.6
VIH=VCC-0.6V
750 750 µA

74VCXH16245
5/11
DC SPECIFICATIONS (2.3V < VCC< 2.7V unless oth erwise s pecified)
DYNAMIC SWITCHING CHARACTERISTICS (T
a
= 25°C, Input tr=tf=2.0ns,CL= 30pF, RL= 500Ω)
1) Number ofoutputsdefined as"n". Measured with "n-1" outputs switching fromHIGH to LOWor LOW to HIGH.Theremaining outputis
measured in the LOW state.
2) Number ofoutputsdefined as"n". Measured with "n-1" outputs switching fromHIGH to LOWor LOW to HIGH.Theremaining outputis
measured in the HIGH state.
3) Parameters guaranteed by design.
Symbol Parameter
Test Condition Value
Unit
V
CC
(V)
-40to85°C -55to125°C
Min. Max. Min. Max.
V
IH
High Level Input
Voltage
2.3to2.7
1.6 1.6
V
V
IL
Low Level Input
Voltage
0.7 0.7
V
OH
High Level Output
Voltage
2.3to2.7
IO=-100 µAVCC-0.2 VCC-0.2
V
2.3
I
O
=-6 mA
2.0 2.0
I
O
=-12 mA
1.8 1.8
I
O
=-18 mA
1.7 1.7
V
OL
Low Level Output
Voltage
2.3to2.7
IO=100 µA
0.2 0.2
V
2.3
I
O
=12 mA
0.4 0.4
I
O
=18 mA
0.6 0.6
I
I
Input Leakage
Current
2.3to2.7
V
I
= 0 to 3.6V
± 5 ± 5 µA
I
I(HOLD)
Input Hold Current
2.3
VI= 0.7V
45 45
µA
V
I
= 1.7V
-45 -45
I
off
Power Off Leakage
Current
0
V
I
or VO= 0 to 3.6V
10 10 µA
I
OZ
High Impedance
Output Leakage
Current
2.3to2.7
V
I=VIH
or V
IL
VO= 0 to 3.6V
± 10 ± 10 µA
I
CC
Quiescent Supply
Current
2.3to2.7
VI=VCCor GND
20 20
µA
V
I
or VO=VCCto
3.6V
± 20 ± 20
Symbol Parameter
Test Condition Value
Unit
V
CC
(V)
T
A
=25°C
Min. Typ. Max.
V
OLP
Dynamic Low Voltage Quiet
Output (note 1, 3)
2.5 VIL=0V
V
IH=VCC
0.6
V
3.3 0.8
V
OLV
Dynamic Low Voltage Quiet
Output (note 1, 3)
2.5 VIL=0V
V
IH=VCC
-0.6
V
3.3 -0.8
V
OHV
Dynamic High Voltage Quiet
Output (note 2, 3)
2.5 VIL=0V
V
IH=VCC
1.9
V
3.3 2.2

74VCXH16245
6/11
AC ELECTRICAL CHARACTERISTICS (CL= 30pF, RL=500Ω, Input tr=tf= 2.0ns)
1) Skew is defined as the absolute value of the differencebetween the actual propagation delay for any two outputs of the samedevice switching in the same direction, either HIGH or LOW (t
OSLH
=|t
PLHm-tPLHn
|, t
OSHL
=|t
PHLm-tPHLn
|)
2) Parameter guaranteed by design
CAPACITIVE CHARACTERISTICS
1) CPDis defined as the value of the IC’s internal equivalent capacitance which is calculated from the operating current consumption without
load. (Refer to Test Circuit). Average operating current can be obtained by the following equation. I
CC(opr)=CPDxVCCxfIN+ICC
/16 (per
circuit)
Symbol Parameter
Test Condition Value
Unit
V
CC
(V)
-40 to 85 °C -55 to 125 °C
Min. Max. Min. Max.
t
PLHtPHL
Propagation Delay
Time
2.3 to 2.7 1.0 3.2 1.0 3.8
ns
3.0 to 3.6 0.8 2.5 0.8 3.1
t
PZLtPZH
Output Enable Time 2.3 to 2.7 1.0 4.9 1.0 5.6
ns
3.0 to 3.6 0.8 3.8 0.8 4.4
t
PLZtPHZ
Output Disable Time 2.3 to 2.7 1.0 4.2 1.0 4.8
ns
3.0 to 3.6 0.8 3.7 0.8 4.3
t
OSLHtOSHL
Output To Output
Skew Time (note1, 2)
2.3 to 2.7 0.5 0.5
ns
3.0 to 3.6 0.5 0.5
Symbol Parameter
Test Condition Value
Unit
V
CC
(V)
T
A
=25°C
Min. Typ. Max.
C
IN
Input Capacitance
2.5 or 3.3
VIN= 0 or V
CC
4pF
C
OUT
Output Capacitance
2.5 or 3.3
VIN= 0 or V
CC
8pF
C
PD
Power Dissipation Capacitance
(note 1)
2.5 or 3.3 fIN= 10MHz
V
IN
= 0 or V
CC
28 pF

74VCXH16245
7/11
TEST CIRCUIT
CL= 30 pF or equivalent (includes jig and probe capacitance)
R
L
=R1=500Ω or equivalent
R
T=ZOUT
of pulse generator (typically 50Ω)
WAVEFORM SYMBOL VALUES
TEST SWITCH
t
PLH,tPHL
Open
t
PZL,tPLZ(VCC
= 3.0 to 3.6V)
6V
t
PZL,tPLZ(VCC
= 2.3 to 2.7V) 2V
CC
t
PZH,tPHZ
GND
Symbol
V
CC
3.0 to3.6V 2.3 to 2.7V
V
IH
2.7V
V
CC
V
M
1.5V
V
CC
/2
V
X
VOL+ 0.3V VOL+ 0.15V
V
Y
VOH- 0.3V VOH- 0.15V

74VCXH16245
8/11
WAVEFORM 1: PROPAG ATION DE LAYS (f=1MHz; 50% duty cycle)
WAVEFORM 2: OUTPUT ENABLE AND DISABLE TIME (f=1MHz; 50% duty cycle)

74VCXH16245
9/11
DIM.
mm. inch
MIN. TYP MAX. MIN. TYP. MAX.
A 1.2 0.047
A1 0.05 0.15 0.002 0.006
A2 0.9 0.035
b 0.17 0.27 0.0067 0.011
c 0.09 0.20 0.0035 0.0079
D 12.4 12.6 0.488 0.496
E 8.1 BSC 0.318 BSC
E1 6. 0 6.2 0.236 0.244
e 0.5 BSC 0.0197 BSC
K0˚ 8˚0˚ 8˚
L 0.50 0.75 0. 020 0. 030
TSSOP48 MECHANICAL DATA
c
E
b
A2
A
E1
D
1
PIN 1 IDENTIFICATION
A1
L
K
e
7065588C

74VCXH16245
10/11
DIM.
mm. inch
MIN. TYP MAX. MIN. TYP. MAX.
A 330 12.992
C 12.8 13.2 0.504 0.519
D 20.2 0.795
N 60 2.362
T 30.4 1.197
Ao 8.7 8.9 0.343 0.350
Bo 13.1 13.3 0.516 0.524
Ko 1.5 1.7 0.059 0.067
Po 3.9 4.1 0.153 0.161
P 11.9 12.1 0.468 0.476
Tape & Reel TSSOP48 MECHANICAL DATA

74VCXH16245
11/11
Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the
consequences of use o f suc h inf ormat ion n or f or an y infr ingeme nt of paten ts or oth er ri gh ts of third part ies whic h may resul t f rom
its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications
mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information
previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or
systems without express written approval of STMicroelectronics.
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