ST ST2378E User Manual

ST2378E

8-bit dual supply 1.71V to 5.5V level translator

General features

■ High speed:

–t

= 15ns (Max.) at TA = 85°C

PD

–V

= 1.8V

L

–V

■ Guaranteed data rate:

–13Mbps (1.8V

■ Low power dissipation:

–I
–I
–I

■ Output impedance:

–|I
–I

■ Bi-directional level translation

■ Totem pole and open drain driving for I

communications

■ 5V tolerant on enable pin

■ Wide operating voltage range:

–V
–VCC(Opr) = 1.71V to 5.5V

■ ESD performance

■ HBM > 15KV ESD protection on I/OV

■ Leadfree Flip-Chip and TSSOP packages

= 5.5V

CC

≤ V

≤ VCC ≤ 5.5V)

L

= I

TS-VL

= 100µA (Max.) at TA = 85°C

QVL

= 10µA (Max.) at TA = 85°C

QCC

| = 20µA(Min. ) a t VL=1.8V; V

OHA

= 1.0µA(Min.) at VL=1.8V V

OLA

(Opr) = 1.71V to V

L

= 1µA (Max.) at TA = 85°C

TS-VCC

CC

CC
CC

2

CC

with I/O V

= 5.5V
= 5.5V

C

lines

± 15KV ESD protection

CC

TSSOP20 Flip-Chip20

Description

The ST2378E is an 8-bit, dual supply,
bi-directional level translator with ±15kV ESD­protection on I/Os at V
interface data transfer between low-voltage
ASICs/PLDs and higher voltage systems.
Externally applied voltage, V
levels at both sides with range specified as

1.71V ≤ V

≤ 5.5V and VL ≤ V

L

proper operation, V
VL.

Utilizing a transmission-gate-based design, this
device allows bi-directional asynchronous data
transfer, which means each channel is allowed to
have either V

to VL or VL to VCC data transfer

CC

direction independently and no direction pin is
required. ST2378E operates at guaranteed data
rate of 13Mbps over the entire specified operating
voltage range.

side. It is designed to

CC

and VL, set logic

CC

≤ 5.5V. For

should be set higher than

CC

CC

Among the other features is included the OE pin
which allows disable-mode operation whereby
current consumption is reduced to less than 1µA.

Order codes

Part number Temperature range Package Comments

ST2378EBJR -40 to 85 °C Flip-Chip20 (Tape and Reel) 3000 parts per reel
ST2378ETTR -40 to 85 °C TSSOP20 (Tape and Reel) 2500 parts per reel

April 200 6 Rev 1 1/22

www.st.com

22

Contents ST2378E

Contents

1 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

2 Pin settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

2.1 Pin connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

2.2 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

3 Electrical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

3.1 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

3.2 Recommended operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

4 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

5 Test circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

6 Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

7 Mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

8 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

2/22

ST2378E Block diagram

1 Block diagram

Figure 1. Block diagram

Figure 2. Functional diagram (1 I/O line)

3/22

Pin settings ST2378E

2 Pin settings

2.1 Pin connection

Figure 3. Pin connection

(Bottom view) Bump side

2.2 Pin description

Table 1. Pin description

Flip-Chip20 Pin N° TSSOP20 Pin N° Symbol Name and function

E2, D1, D2, C1, C2, B1,

B2, A1

E3, D4, D3, C4, C3, B4,

B3, A4

A2 11 OE Output Enable Inputs
A3 10 GND Ground (0V)
E1 1

E4 20

Flip-Chip20

2, 18, 4, 16, 6, 14, 8, 12

19, 3, 17, 5, 15, 7, 13, 9

I/O

I/O

VCC1

TSSOP20 (Top view)

to I/O

VL1

to I/O

V

L

V

CC

VL8

VCC8

Data Inputs/Outputs

Data Inputs/Outputs

Positive Supply Voltage
Positive Supply Voltage

4/22

ST2378E Electrical data

3 Electrical data

3.1 Maximum ratings

Table 2. Absolute maximum rating

Symbol Parameter Value Unit

V

Supply Voltage

L

V
V

V

I/OVL

V

I/OVCC

I

IOVL

I

IOVCC

I

SCTOUT

I

CCB

T

1. 500mW: ≅ 65°C derated to 300mW by 10mW/°C: 65°C to 85°C

Supply Voltage -0.3 to +7.0 V

CC

DC Control Input Voltage -0.3 to +7.0 V

OE

DC I/OVL Input Voltage (OE = Gnd or VL)-0.3 to V
DC I/O

I

DC Input Diode Current (OE Control Pin) − 20 mA

IK

Input Vol tage (OE = Gnd or VL) -0.3 to VCC + 0.3

VCC

DC Output Current ± 25 mA
DC Output Current ± 25 mA
Short Ci rc u it D u ra ti on I/OVL, I/O

Driven from 40mA

VCC

Source
DC VCC or Ground Current

P

Power Dissipation

d

Storage Temperature -65 to +150 °C

stg

T

Lead Temperature (10 sec) 300 °C

L

(1)

-0.3 to V

L

CC

+ 0.3

V

V
V

Continuous mA

± 100 mA

500 mW

5/22

Electrical data ST2378E

3.2 Recommended operating conditions

Table 3. Recommended operating conditions

Symbol Parameter Value Unit

V

V

V

I/OVL

V

I/OVCC

T

dt/dv

Supply Voltage

L

Supply Voltage 1.71 to 5.5 V

CC

Input Voltage (OE Output Enable Pin, VL Power Supply

V

I

referred)
I/OVL Voltage 0 to V

I/O

Voltage 0 to V

VCC

Operating Temperature -40 to 85 °C

op

Input Rise and Fall Time (OE Control Pin)

(1)

1.71 to V

CC

0 to 5.5 V

L

CC

0 to 10 ns/V

V

V
V

1. V

2. V

dt/dv

Input Rise an d Fall T ime

from 10% VL to 90%V

OE

from 10%VL to 90%VL; V

IOVL

1.71 < VL < VCC < 5V

(2)

V

= VL = 5V

CC

L

from 10%VCC to 90%V

IOVCC

CC

0 to 10 ns/V

0 to 3 ns/V

6/22

ST2378E Electrical characteristics

4 Electrical characteristics

Table 4. DC Specification

Test Condition Value

T

Symbol Parameter

V

High Level Input

IHL

Voltage (I/O

VL

V

V

L(*)

CC(*)

(V)

1.8

2.5

)

3.3

5.0

1.8

V

V

V

V

V

(V)

L

5.5

L

5.5

L

5.5

L

5.5

L

5.5

to

to

to

to

to

0.75V

0.75V

0.75V

= 25 °C

A

-40 to 85 °C

Min. Typ Max. Min. Max.

V

-0.2 VL-0.2

L

L

L

L

0.75V

0.75V

0.75V

L

L

L

0.15 0.15

Unit

V

V

to

V

V

V

V

V

V

V

V

V

L

5.5

L

5.5

L

5.5

L

5.5

L

5.5

L

5.5

L

5.5

L

5.5

L

5.5

L

5.5

to

to

to

to

to

to

to

to

to

0.30 0.30

0.30 0.30

0.30 0.30

V

-0.2 VL-0.2

L

0.75V

CC

0.75V

CC

0.75V

CC

0.15 0.15

0.30 0.30

0.30 0.30

0.75V

0.75V

0.75V

V

CC

V

CC

CC

V

V

Low Level Input

ILL

Voltage (I/O

VL

)

3.3

5.0

1.8

2.5

2.5

V

High Level Input

IHC

Voltage (I/O

VCC

)

3.3

5.0

1.8

2.5

V

Low Level Input

ILC

Voltage (I/O

VCC

)

3.3

5.0

V

L

5.5

to

0.30 0.30

7/22

Electrical characteristics ST2378E

Table 4. DC Specification

Test Condition Value

T

Symbol Parameter

V

V

IH-TS

High Level Input
Voltage (OE)

Low Level Input

IL-TS

Voltage (OE)

V

L(*)

(V)

1.8

2.5

3.3

5.0

1.8

2.5

3.3

V

V

V

V

V

V

V

V

CC(*)

(V)

to

L

5.5
to

L

5.5
to

L

5.5
to

L

5.5
to

L

5.5
to

L

5.5
to

L

5.5

0.75V

0.75V

0.75V

= 25 °C

A

-40 to 85 °C

Min. Typ Max. Min. Max.

V

-0.2 VL-0.2

L

L

L

L

0.75V

0.75V

0.75V

L

L

L

0.15 0.15

0.25V

0.25V

L

L

0.25V

0.25V

Unit

V

L

V

L

V

OHL

V

OLL

V

OHC

V

OLC

I

TSL

I

TS-LKG

I

QVCC

High Level
Output Voltage
I/O

VL

Low Level
Output Voltage
I/O

VL

High Level
Output Voltage
I/O

VCC

Low Level
Output Voltage
I/O

VCC

Control Input
Leakage Current
(OE)

High Impedance
Input Leakage
Current (IO

I/O

VCC

,

VL

)

Quiescent
Supply Current
V

CC

5.0

1.8 to

5.5

1.8 to

5.5

1.8 to

5.5

1.8 to

5.5

1.8 to

5.5

V

V

V

V

V

V

L

5.5

L

5.5

L

5.5

L

5.5

L

5.5

L

5.5

to

to

to

to

to

to

I

=-20 µA

O

I/O

VCC≥VCC

IO=1.0 mA
I/O

≤0.15V

VCC

=-20 µA

I

O

I/O

VL≥VL

-0.2

IO=1.0 mA
I/O

≤0.15V

VL

=GNDor5.5

V

I

OE = GND

I/O

I/O

VL,

VCC

unconnected

-0.2

0.67V

0.67V

0.25V

L

L

0.67V

0.25V

L

0.40 0.40

CC

0.67V

CC

0.40 0.40

11µA

11µA

0.1 1 10 µA

L

V

V

8/22

ST2378E Electrical characteristics

Table 4. DC Specification

Test Condition Value

T

Symbol Parameter

V

L(*)

(V)

V

CC(*)

(V)

= 25 °C

A

-40 to 85 °C

Min. Typ Max. Min. Max.

Unit

I

QVL

I

TS-VCC

I

TS-VL

Quiescent
Supply Current
V

L

High Impedance
Mode Quiescent
Supply Current
V

CC

High Impedance
Mode Quiescent
Supply Current
V

L

1.8 to

5.5

1.8 to

5.5

1.8 to

5.5

V

V

V

L

5.5

L

5.5

L

5.5

to

to

to

I/O

I/O

VL,

VCC

unconnected

OE= GND

OE= GND
I/O

=GND to VL

VL

I/O

= GND to

VCC

V

CC

Note: 1 Typical values are referred to TA = 25°C

2 Power Supply Range: V
3 For normal operation, ensure V

, VCC 1.8V ± 5%, 2.5 ± 0.2V, 3.3 ± 0.3V, 5.0 ± 0.5V

L

< (VCC + 0.3V). During power-up, VL > (VCC + 0.3V) will not

L

damage the device

13 20 100 µA

11µA

11µA

9/22

Electrical characteristics ST2378E

Table 5. AC Electrical characteristics (totem pole driving)

T est Condition

C

=15pF tr=tf ≤ 6ns

L

Symbol Parameter

Driver output

R

≤ 50Ω

T

(3)

(V)

V

L

V

CC

1.8 1.8 11 15

1.8 2.5 11 15

t

RVCC

Rise Time I/O

VCC

(3)(8)

1.8 3.3 10 15

1.8 5.0 9 15

2.5 3.3 8 15

1.8 1.8 6 15

1.8 2.5 7 15

t

FCC

Fall Time I/O

VCC

(3)(8)

1.8 3.3 8 15

1.8 5.0 10 15

2.5 3.3 6 15

1.8 1.8 12 15

1.8 2.5 10 15

t

RVL

Rise Time I/O

VL

(3)(8)

1.8 3.3 9 15

1.8 5.0 10 15

2.5 3.3 7 15

1.8 1.8 7 15

1.8 2.5 6 15

t

FVL

Fall Time I/O

VL

(3)(8)

1.8 3.3 6 15

1.8 5.0 7 15

2.5 3.3 4 15

1.8 1.8 6 15

1.8 2.5 7 15

t

PLH

1.8 3.3 7 15

1.8 5.0 7 15

t

IOVL-VCC

Propagation Delay Time(4)
I/O

I/O

VL-LH
VL-HL

to I/O

to I/O

VCC-LH
VCC-HL

2.5 3.3 4 15

1.8 1.8 5 15

1.8 2.5 5 15

t

PHL

1.8 3.3 6 15

1.8 5.0 8 15

2.5 3.3 4 15

(2)

(1)

(V)

(3)

Min.

Value

-40 to +85 °C

(4)

Typ.

Unit

Max.

ns

ns

ns

ns

ns

10/22

ST2378E Electrical characteristics

Table 5. AC Electrical characteristics (totem pole driving)

CC

(V)

Min.

Symbol Parameter

Test Condition

C

=15pF tr=tf ≤ 6ns

L

Driver output

R

≤ 50Ω

T

V

(V) V

L

1.8 1.8 2 15

1.8 2.5 2 15

t

PLH

1.8 3.3 2 15

1.8 5.0 2 15

t

IOVCC-VL

Propagation Delay Time(4)
I/O

I/O

VCC-LH
VCC-HL

to I/O

to I/O

VL-LH
VL-HL

2.5 3.3 2 15

1.8 1.8 5 15

1.8 2.5 5 15

t

PHL

1.8 3.3 5 15

1.8 5.0 6 15

2.5 3.3 4 15

t

PZL tPZH

t

PLZ tPZL

1. For normal operation, ensure VL < (VCC + 0.3V). During power-up, VL > (VCC + 0.3V) will not damage the device

2. For V

3. Power Supply Range: V

4. Typica l values are referr ed to T

5. Rise Time:10% to 90%, Fall Time 90% to 10%

6. tpd: 50% to 50 %

7. Skew is defin ed as the absolute value of the difference between the actual propagation delay for any two outputs of the

8. Each translator equally l oaded; par ameter guaranteed by desi gn

t

OSLH

t

OSHL

Output Enable and Disable Time

Channel to channel Skew T ime

(6)(7)

1.8 1.8 60 80

1.8 5.0 150 200

1.8 1.8 0.1 1

1.8 5.0 0.5 1

DR Maximum Data Rate 1.8 to 5.0

= VL = 1.8V, tr = tf ≤ 4ns

CC

, VCC 1.8V ± 5%, 2.5 ± 0.2V, 3.3 ± 0.3V, 5.0 ± 0.5V.

L

=25°C Ty p ic al values are ref er red to TA=25°C

A

same devi ce switching in the s ame direction, either HIGH o r LOW (t

V

L

OSLH

to 5.0

= | t

13 Mbps

- t

PLHm

PLHn

Value

-40 to +85 °C

Typ.

|, t

= | t

OSHL

PHLm

Max.

- t

PHLn

Unit

ns

ns

ns

|

11/22

Electrical characteristics ST2378E

Table 6. AC characteristic (open drain driving)

Symbol Parameter

t

RVCC

Rise Time I/O

VCC

(3)(8)

T est Condition

=15pF tr=tf ≤ 6ns

C

L

(1)

Driver output

≤ 50Ω

V

CC

(2)

(V)

(3)

Min.

R

T

(3)

(V)

V

L

1.8 1.8 210 300

1.8 5.0 59 150

Value

-40 to +85 °C

(4)

Typ.

Unit

Max.

ns

t

FCC

t

RVL

t

FVL

t

IOVL-VCC

t

IOVCC-VL

t

PZL tPZH

t

PLZ tPZL

t

OSLH

t

OSHL

Fall Time I/O

Rise Time I/O

Fall Time I/O

VCC

VL

VL

(3)(8)

Propagation Delay Time(4)

I/O
I/O

VL-LH
VL-HL

to I/O

to I/O

VCC-LH
VCC-HL

Propagation Delay Time(4)

I/O
I/O

Output Enable and Disable Time

VCC-LH
VCC-HL

to I/O

to I/O

VL-LH
VL-HL

Channel to channel Skew Time

(6)(7)

(3)(8)

(3)(8)

t

t

t

t

PLH

PHL

PLH

PHL

1.8 1.8 12 30
ns

1.8 5.0 20 30

1.8 1.8 210 300
ns

1.8 5.0 96 150

1.8 1.8 11 30
ns

1.8 5.0 11 30

1.8 1.8 210 300

1.8 5.0 100 150
ns

1.8 1.8 7 20

1.8 5.0 14 20

1.8 1.8 210 300

1.8 5.0 57 150
ns

1.8 1.8 7 20

1.8 5.0 8 20

1.8 1.8 60 80
ns

1.8 5.0 150 200

1.8 1.8 10 20
ns

1.8 5.0 2 10

V

DR Maximum Data Rate 1.8 to 5.0

1. For normal operation, ensure VL < (VCC + 0.3V). During power-up, VL > (VCC + 0.3V) will not damage the device

2. For V

3. Power Supply Range: V

4. Typica l values are referr ed to T

5. Rise Time:10% to 90%, Fall Time 90% to 10%

6. tpd: 50% to 50 %

7. Skew is defin ed as the absolute value of the difference between the actual propagation delay for any two outputs of the

8. Each translator equally l oaded; par ameter guaranteed by desi g

= VL = 1.8V, tr = tf ≤ 4ns

CC

, VCC 1.8V ± 5%, 2.5 ± 0.2V, 3.3 ± 0.3V, 5.0 ± 0.5V.

L

=25°C

A

same devi ce switching in the s ame direction, either HIGH o r LOW (t

L

OSLH

to 5.0

= | t

800 kbps

- t

|, t

PLHm

PLHn

OSHL

= | t

PHLm

- t

PHLn

|

12/22

ST2378E Test circuit

5 Test circuit

Figure 4. Test circuit

Note: C

Table 7. Test circuit switches

Test

t

, t

PLH

PHL

t

, t

PZL

PLZ

t

, t

PZH

PHZ

= 15/50pF or equivalent (includes jig and probe capacitance)

L

= 1KΩ or equivalent

R

1

R

T

= Z

of pulse generator (typically 50Ω)

OUT

Drivi n g I/ O

VL

Open Open Open

V

CC

Gnd Gnd -

Switch

Driving I/O

V

L

Table 8. Truth table

Control Pin Bidirectional Input/Outputs

OE

(1)

H

(1)

H

LZ Z

1. High Level VL Power Supply referred

2. High Level VCC Power Supply referred

I/O

VL

(1)

H

LL

VCC

Open Drain Driving

-

I/O

VCC

(2)

H

Note: X= Do not care; Z = High Impedance;

13/22

Waveforms ST2378E

6 Waveforms

Table 9. Waveform symbol value

Drivi ng I/ O

≤ 2.5V 3.3V ≤ VL≤ V

CC

V

CC

CC

CC

VCC

V

CC

50% V
50% V

CC

CC

CC

≤ 5.0V

Symbol

V

IH

V

IM

V

OM

V

X

V

Y

Drivi n g I/O

1.8V ≤ VL≤ V

50% V

50% V

≤ 2.5V 3.3V ≤ VL≤ V

CC

V

L

L

CC

VOL +0.15V VOL +0.3V VOL +0.15V VOL +0.3V
VOH -0.15V VOH -0.3V VOH -0.15V VOH -0.3V

VL

V

50% V

50% V

≤ 5.0V 1.8V ≤ VL≤ V

CC

L

L

CC

50% V
50% V

Figure 5. Waveform - propagation delay (f = 1MHz; 50% duty cycle)

14/22

ST2378E Waveforms

Figure 6. Waveform - output enable and disable time (f = 1MHz; 50% duty cycle)

15/22

Package mechanical data ST2378E

7 Package mechanical data

In order to meet environmental requirements, ST offers these devices in ECOPA CK ®
packages. These packages have a Lead-free second level interconnect . The category of
second level interconnect is marked on the package and on the inner box label, in
compliance with JEDEC Standard JESD97. The maximum ratings related to soldering
conditions are also marked on the inner box label. ECOPACK is an ST trademark.
ECOPACK specifications are available at: www.st.com

16/22

ST2378E Package mechanical data

Figure 7. TSSOP20 Mechanical data

TSSOP20 MECHANICAL DATA

DIM.

A 1.2 0.047

A1 0.05 0.15 0.002 0.004 0.006

A2 0.8 1 1.05 0.031 0.039 0.041

b 0.19 0.30 0.007 0.012

c 0.09 0.20 0.004 0.0079

D 6.4 6.5 6.6 0.252 0.256 0.260

E 6.2 6.4 6.6 0.244 0.252 0.260

E1 4.3 4.4 4.48 0.169 0.173 0.176

e 0.65 BSC 0.0256 BSC

K0˚ 8˚0˚ 8˚

L 0.45 0.60 0.75 0.018 0.024 0.030

MIN. TYP MAX. MIN. TYP. MAX.

A2

A

A1

mm. inch

b

e

c

K

L

E

PIN 1 IDENTIFICATION

D

E1

1

0087225C

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Package mechanical data ST2378E

Figure 8. Flip-Chip20 Mechanical data

Flip-Chip20 MECHANICAL DATA

DIM.

MIN. TYP MAX. MIN. TYP. MAX.

A 0.810.891.0031.935.039.4

A1 0.15 0.24 0.35 5.9 9.4 13.8

A2 0.65 25.6

b 0.25 0.30 0.35 9.8 11.8 13.8

D 2.412.462.5194.996.998.8

D1 2.00 78.7

E 1.931.982.0376.078.079.9

E1 1.5 59.1

e0.50 19.7

SE 0.25 9.8

mm. mils

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7487339-D

ST2378E Package mechanical data

Figure 9. TSSOP20 Tape and reel

Tape & Reel TSSOP20 MECHANICAL DATA

DIM.

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 22.4 0.882
Ao 6.8 7 0.268 0.276
Bo 6.9 7.1 0.272 0.280
Ko 1.7 1.9 0.067 0.075
Po 3.9 4.1 0.153 0.161

P 11.9 12.1 0.468 0.476

mm. inch

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Package mechanical data ST2378E

Figure 10. Flip-Chip20 Tape and reel

Tape & Reel Flip-Chip20 MECHANICAL DATA

DIM.

MIN. TYP MAX. MIN. TYP. MAX.

A 180 7.086

C 12.8 13.2 0.504 0.519

D 20.2 0.795

N 60 2.362

T 14.4 0.567
Ao 2.13 2.23 2.33 0.084 0.088 0.092
Bo 2.62 2.72 2.82 0.103 0.107 0.111
Ko 1.05 1.15 1.25 0.041 0.045 0.049
Po 3.9 4.1 0.153 0.161

P 3.9 4.1 0.153 0.161

mm. inch

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ST2378E Revision history

8 Revision history

Table 10. Revision history

Date Revision Changes

10-Apr-2006 1 Initial release.

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ST2378E

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