ST STLVD111 User Manual

Features

■ 100ps part-to part skew

■ 50ps bank skew

■ Differential design

■ Meets LVDS spec. for driver outputs and

receiver inputs

■ Reference voltage available output V

Low voltage V

■

■ High signalling rate capability (exceeds

range of 2.375V to 2.625V

CC

BB

622MHz)

■ Support open, short and terminated input fail-

safe (low output state)

■ Programmable drivers power off control

Description

The STLVD111 is a low skew programmable 1 to
10 differential LVDS driver, designed for clock
distribution. The select signal is fanned out to 10
identical differential outputs.

The STLVD111 is provided with a 11 bit shift
register with a serial in and a Control Register.
The purpose is to enable or power off each output
clock channel and to select the clock input. The

STLVD111

Programmable low voltage

1:10 differential LVDS clock driver

TQFP32

STLVD111 is specifically designed, modelled and
produced with low skew as the key goal. Optimal
design and layout serve to minimize gate to gate
skew within a device. The net result is a
dependable guaranteed low skew device.

The STLVD111 can be used for high performance
clock distribution in 2.5V systems with LVDS
levels. Designers can take advantage of the
device’s performance to distribute low skew
clocks across the backplane or the board.

Order codes

Part number

STLVD111BFR -40 to 85 °C TQFP32 (Tape & Reel) 2400 parts per reel

May 2007 Rev. 8 1/19

Temperature

range

Package Packaging

www.st.com

19

STLVD111

Contents

1 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

2 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

3 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

4 Specification of control register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

4.1 Programmed mode (EN=1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

4.2 Standard mode (EN=0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

5 Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

6 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

7 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

2/19

STLVD111 Pin configuration

1 Pin configuration

Figure 1. Pin connections

3/19

Pin configuration STLVD111

Table 1. Pin description

Pin n° Symbol Name and function

1 CK Control register clock

2 SI Control register serial IN/CLK_SEL

3 CLK0 Differential input

4 CLK0 Differential input

5V

BB

6 CLK1 Differential input

7 CLK1 Differential input

8 EN Device enable/program

9 GND Ground

10 Q9 Differential outputs

11 Q9 Differential outputs

12 Q8 Differential outputs

13 Q8 Differential outputs

14 Q7 Differential outputs

Output reference voltage

15 Q7 Differential outputs

16 V

CC

Supply voltage

17 Q6 Differential outputs

18 Q6 Differential outputs

19 Q5 Differential outputs

20 Q5 Differential outputs

21 Q4 Differential outputs

22 Q4 Differential outputs

23 Q3 Differential outputs

24 Q3 Differential outputs

25 GND Ground

26 Q2 Differential outputs

27 Q2 Differential outputs

28 Q1 Differential outputs

29 Q1 Differential outputs

30 Q0 Differential outputs

31 Q0 Differential outputs

32 V

CC

Supply voltage

4/19

STLVD111 Maximum ratings

2 Maximum ratings

Table 2. Absolute maximum ratings

Symbol Parameter Value Unit

V

V

V

I

OSD

CC

I

O

Supply voltage -0.3 to 2.8 V

Input voltage -0.2 to (VCC+0.2) V

Output voltage -0.2 to (VCC+0.2) V

Driver short circuit current Continuous

ESD Electrostatic discharge (HBM 1.5KΩ, 100pF) >2 KV

Note: Absolute Maximum Ratings are those values beyond which damage to the device may

occur. Functional operation under these condition is not implied.

Table 3. Recommended operating conditions

Symbol Parameter Min. Typ. Max. Unit

V

CC

V

IC

T

A

T

J

Supply voltage 2.375 2.625 V

Receiver common mode input voltage 0.5(VID) 2-0.5(VID)V

Operating free-air temperature range -40 85 °C

Operating junction temperature -40 105 °C

Table 4. Thermal data

Symbol Parameter Value Unit

R

thJC

Thermal resistance junction-case 13 °C/W

5/19

Electrical characteristics STLVD111

3 Electrical characteristics

Table 5. Driver electrical characteristics (T

= -40 to 85 °C, VCC = 2.5V ± 5%, unless otherwise

A

specified Note: 1, 2)

Symbol Parameter Test condition Min. Typ. Max. Unit

V

ΔV

V

ΔV

I

OS

Output differential voltage (Figure 4.)RL = 100 Ω 400 500 600 mV

OD

VOD magnitude change 30 mV

OD

Offset voltage -40 ≤ TA ≤ 85°C 1.05 1.15 1.25 V

OS

VOS magnitude change 30 V

OS

V

= 0V 15 30

Output short circuit current

O

= 0V 7 15

V

OD

mA

Note: 1 All currents into device pins are positive; all currents out of device pins are negative. All

voltages are referenced to device ground unless otherwise specified.

2 All typical values are given for V

= 2.5V and TA = 25°C unless otherwise stated

CC

Table 6. Receiver electrical characteristics (TA = -40 to 85 °C, VCC = 2.5V ± 5%, unless otherwise

specified Note: 1, 2)

Symbol Parameter Test condition Min. Typ. Max. Unit

V

IDH

V

IDL

I

IN

Input threshold high 100 mV

Input threshold low -100 mV

V

= 0V 42 100

Input current

V

I

= 0V

I

CC

210

μA

Note: 1 All currents into device pins are positive; all currents out of device pins are negative. All

voltages are referenced to device ground unless otherwise specified.

2 All typical values are given for V

6/19

= 2.5V and TA = 25°C unless otherwise stated

CC