Datasheet SY100S863 Datasheet (MICREL)

8-INPUT PECL
DIFFERENTIAL MUX
WITH TTL SELECTS

FEATURES

■ Low skew

■ Differential PECL inputs

■ Differential cut-off PECL outputs capable of driving

25Ω load for driving data bus

■ Tri-state TTL output

■ TTL select and enable input

■ Internal 75KΩ PECL input pull-down resistors

■ PECL I/O fully compatible with industry standard

■ Available in 28-pin PLCC package

BLOCK DIAGRAM

D0

(4)

D0

(5)

D1

(6)

D1

(7)

D2

(8)

D2

(9)

D3

(10)

D3

(11)

D4

(27)

D4

(26)

PECL INPUTS

D5
D5

D6
D6

D7
D7

(25)
(24)

(23)
(22)

(21)
(20)

8 DIFFERENTIAL

8:1

MUX

Q

(17)
(18)

Q

(13) QTTL

SY100S863

DESCRIPTION

The SY100S863 is a PECL 8:1 multiplexer designed for
use in new, high-performance PECL systems. It has
differential PECL outputs and a standard TTL output. The
TTL select inputs (SEL0, SEL1, SEL2) determine which one
of the eight differential PECL data inputs (D0–D7) is
propagated to the outputs. The enable pin, EN, is provided
for expansion. When EN is at a TTL logic one level, both
PECL and TTL outputs are enabled. When the enable pin
is set to TTL logic zero level, both PECL outputs of the
differential pair are in cut-off and the TTL output is in a
three-state condition.

PIN CONFIGURATION

5

SEL

V

SEL
SEL

6

5

D

D

D

D

4

D

4
0

EE

1
2

D

0

25 24 23 22 21 20 19
26
27
28

1
2
3
4

TOP VIEW

PLCC

J28-1

567891011

1

1

0

D

D

D

6

D

2

D

7

D

D7V

2

3

D

D

CCO

3

D

18

Q

17

Q

16
15
14
13
12

V
EN
V
Q
V

CC

CCT

TTL

GT

(2)

(15)

(28)

0

EN

SEL

SEL1

TTL INPUTS

(3)

SEL2

PIN NAMES

Pin Function

D0, /D0 – D7, /D7 Differential PECL Input Pairs
Q, /Q Differential PECL Outputs
QTTL TTL Output
EN Enable Input

0,1,2 Select Inputs

SEL

Rev.: E Amendment: /0

1

Issue Date: May 2000

Micrel

TRUTH TABLE

EN SEL2 SEL1 SEL0 QQTTL

HLLLD0 D0
HLLHD1 D1
HLHLD2 D2
HLHHD3 D3
HHLLD4 D4
HHLHD5 D5
HHHLD6 D6
HHHHD7 D7

LXXXZZ

PECL DC ELECTRICAL CHARACTERISTICS

VCC = VCCO = VCCT = 5.0V ± 5%; VEE = VGT = GND

Symbol Parameter Min. Typ. Max. Unit Condition

VOH Output HIGH Voltage
VOL Output LOW Voltage
VOZ Cutoff Voltage
VIH Input HIGH Voltage 3.835 — 4.13 V
VIL Input LOW Voltage 3.17 — 3.525 V
IIH Input HIGH Current ——350 µAVIN = VIH (Max.)
IIL Input LOW Current 0.50 ——µAVIN = VIL (Min.)

CC VCC Supply Current — 73 88 mA

I

NOTE:

1. Levels shown are for VCCO = 5.0V and will vary 1:1 with powers.

(1)

(1)

(1)

3.975 4.045 4.13 V Loading with 25Ω to 3V (VCC-2V)

3.17 3.295 3.38 V Loading with 25Ω to 3V (VCC-2V)
— 3 3.10 V Loading with 25Ω to 3V (VCC-2V)

SY100S863

TTL DC ELECTRICAL CHARACTERISTICS

VCC = VCCO = VCCT = 5.0V ± 5%; VEE = VGT = GND

Symbol Parameter Min. Typ. Max. Unit Condition

VOH Output HIGH Voltage 2.4 2.9 — VIOH = –3mA
VOL Output LOW Voltage — 0.3 0.5 V IOL = 24mA
VIH Input HIGH Voltage 2.0 — VCC V
VIL Input LOW Voltage 0 — 0.8 V
IIH Input HIGH Current ——1.0 mA VIN = 2.7V
IIL Input LOW Current –0.7 ——mA VIN = 0.5V
VIK Input Clamp Voltage –1.2 ——VIIN = –18mA
IOS Output Short Circuit Current –200 —–60 mA VOUT = 0V, VCCT = 5.5V
IOZHT Tri-state Current Output HIGH ——70 µAVOUT = 2.7V

OZLT Tri-state Current Output LOW –700 ——µAVOUT = 0.5V

I

2

Micrel

SY100S863

PECL AC ELECTRICAL CHARACTERISTICS

VCC = VCCO = +5.0V ± 5%; VEE = VGT = GND

TA = 0°CTA = +25°CTA = +85°C

Symbol Parameter Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Unit Condition

PLH Propagation Delay

t

PHL D to Q 500 — 900 500 — 900 500 — 900

t

SEL

0 to Q 300 — 2000 300 — 2000 300 — 2000

SEL1 to Q 300 — 1750 300 — 1750 300 — 1750
SEL2 to Q 300 — 1500 300 — 1500 300 — 1500

PZH EN to Q

t

(Cutoff to HIGH)

tPHZ EN to Q

(3)

(3)

300 — 1300 300 — 1300 300 — 1300

(HIGH to Cutoff)

r Output Rise/Fall Times

t
tf 20% to 80%

NOTES:

1. Part-to-part skew is defined as Max. – Min. value at the given temperature.

2. RL = 50Ω

3. Figures 1 and 2

(1),(2)

300 — 1750 300 — 1750 300 — 1750 ps

(2)

300 400 600 300 400 600 300 400 600 ps

ps

TTL AC ELECTRICAL CHARACTERISTICS

VCC = VCCO = 5V ± 5%; VEE = VGT = GND

TA = 0°CTA = +25°CTA = +85°C

Symbol Parameter Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Unit Condition

t

PLH Propagation Delay

tPHL D to QTTL 2.5 — 5.0 2.5 — 5.0 2.5 — 5.0

SEL0 to QTTL 2.5 — 5.0 2.5 — 5.0 2.5 — 5.0
SEL1 to QTTL 2.5 — 5.0 2.5 — 5.0 2.5 — 5.0
SEL2 to QTTL 2.5 — 5.0 2.5 — 5.0 2.5 — 5.0

PZH EN to TTL Output

t
tPZL (Enable Time) 2.5 — 5.0 2.5 — 5.0 2.5 — 5.0

PHZ EN to TTL Output

t
tPLZ (Disable Time) 2.5 — 5.0 2.5 — 5.0 2.5 — 5.0

r Output Rise/Fall Time

t
tf 0.8V to 2.4V 0.3 — 1.6 0.3 — 1.6 0.3 — 1.6

0.8Vto 2.0V

NOTES:

1. Part-to-part skew is defined as Max. – Min. value at the given temperature.

2. Figures 3 and 4

3. CL = 25pF

(1)(2)

(2)

(2)

2.5 — 5.0 2.5 — 5.0 2.5 — 5.0 ns

2.5 — 5.0 2.5 — 5.0 2.5 — 5.0 ns

(3)

ns

ns

3

Micrel

µ

µ

PECL-TO-PECL TEST CIRCUITRY

VCC, V

CCT

& V

CCO

2V

SY100S863

0.1

PULSE

GENERATOR

CH C

S

TTL

R

T

50Ω

USE OSCILLOSCOPE
INTERNAL 50Ω LOAD
FOR TERMINATION.

Figure 1. PECL-to-PECL AC Test Circuit

PECL-TO-PECL SWITCHING WAVEFORMS

VEE, V

0.1

GT

–3V

DQ

Q

DUT

50Ω

Q

TTL

EN

450Ω

F

-3V

TTL

0V

CH A CH B

OSCILLOSCOPE

PECL DATA

ENABLE

PECL OUTPUT

Figure 2. PECL-to-PECL Transition — Propagation Delay and Transition Times

tPD

VOH = 4.1V

OL = 3.3V

V

OZ = 3V

V

tPHZ tPZH

4

Micrel

µ

PECL-TO-TTL TEST CIRCUITRY

VCC, V

CCT

& V

CCO

5V

SY100S863

0.1

PULSE

GENERATOR

CH C

S

TTL

R

T

50Ω

USE OSCILLOSCOPE
INTERNAL 50Ω LOAD
FOR TERMINATION.

Figure 3. PECL-to-TTL AC Test Circuit

VEE, V

DQ

Q

DUT

Q

TTL

EN

GT

7V

LZ/ZL
Three-State
Pull-up

500Ω

450Ω

50pF

450Ω

0V

TTL

F

-3V

CH A CH B

OSCILLOSCOPE

5

Micrel

PECL-TO-TTL SWITCHING WAVEFORMS

3V

SY100S863

PECL DATA

TTL OUTPUT

EN

0V

TTL OUTPUT

1.5V

1.5V

0V

1.5V

t

PLH

Figure 4a. PECL-to-TTL Transition, Data to TTL Output Delay

t

PHL

3V

1.5V

t

PZH

1.5V

t

PHZ

0.3V

1.5V

1.5V

V

OH

0V

TTL OUTPUT

t

PZL

Figure 4b. EN to TTL Output Enable and Disable Times

PRODUCT ORDERING CODE

Ordering Package Operating

Code Type Range

SY100S863JC J28-1 Commercial
SY100S863JCTR J28-1 Commercial

1.5V

t

PLZ

0.3V

3.5V

V

OL

6

Micrel

28 LEAD PLCC (J28-1)

SY100S863

Rev. 03

MICREL-SYNERGY 3250 SCOTT BOULEVARD SANTA CLARA CA 95054 USA

TEL + 1 [phone] FAX + 1 [phone] WEB http://www.micrel.com

This information is believed to be accurate and reliable, however no responsibility is assumed by Micrel for its use nor for any infringement of patents or

other rights of third parties resulting from its use. No license is granted by implication or otherwise under any patent or patent right of Micrel Inc.

© 2000 Micrel Incorporated

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