MOTOROLA MC10ELT21, MC100ELT21 Technical data

MOTOROLA

SEMICONDUCTOR TECHNICAL DATA

Differential PECL to TTL	MC10ELT21
Translator	MC100ELT21

The MC10ELT/100ELT21 is a differential PECL to TTL translator. Because PECL (Positive ECL) levels are used only +5V and ground are required. The small outline 8-lead SOIC package and the single gate of the ELT21 makes it ideal for those applications where space, performance and low power are at a premium. Because the mature MOSAIC 1.5 process is used, low cost can be added to the list of features.

The VBB output allows the ELT21 to also be used in a single-ended input mode. In this mode the VBB output is tied to the IN input for a non-inverting buffer or the IN input for an inverting buffer. If used the VBB pin should be bypassed to ground via a 0.01μF capacitor.

The ELT21 is available in both ECL standards: the 10ELT is compatible with positive MECL 10H logic levels while the 100ELT is compatible with positive ECL 100K logic levels.

•3.5ns Typical Propagation Delay

•Differential PECL Inputs

•Small Outline SOIC Package

•24mA TTL Output

•Flow Through Pinouts

LOGIC DIAGRAM AND PINOUT ASSIGNMENT

NC	1		8	VCC
D0	2	TTL	7	Q0
		PECL
D0	3		6	NC
VBB	4		5	GND

8

1

D SUFFIX

PLASTIC SOIC PACKAGE

CASE 751-05

		PIN DESCRIPTION
	PIN		FUNCTION
	Q		TTL Output
	D		Diff PECL Inputs
	VCC		+5.0V Supply
	VBB		Reference Output
	GND		Ground

7/96

Motorola, Inc. 1996

REV 3

MC10ELT21 MC100ELT21

MAXIMUM RATINGS*

Symbol	Parameter	Value	Unit
VCC	DC Supply Voltage (Referenced to GND)	7.0	V
TA	Operating Temperature Range (In Free-Air)	±40 to 85	°C
TSTG	Storage Temperature Range	±55 to +150	°C

*Maximum Ratings are those values beyond which damage to the device may occur. Functional operation should be restricted to the Recommended Operating Conditions.

TTL OUTPUT DC CHARACTERISTICS (VCC = 4.75V to 5.25V; TA = ±40°C to 85°C)

Symbol	Characteristic	Min	Typ	Max	Unit	Condition
VOH	Output HIGH Voltage	2.4			V	IOH = ±3.0mA
VOL	Output LOW Voltage			0.5	V	IOL = 24mA
ICCH	Power Supply Current		20	29	mA
ICCL	Power Supply Current		22	32	mA
IOS	Output Short Circuit Current	±150		±60	mA

PECL INPUT DC CHARACTERISTICS (VCC = 4.75V to 5.25V; TA = ±40°C to 85°C)

			±40°C		0°C			25°C		85°C
Symbol	Characteristic		Min	Max	Min	Max	Min	Typ	Max	Min	Max	Unit	Condition
IIH	Input HIGH Current			150		150			150		150	μA
IIL	Input LOW Current		0.5		0.5		0.5			0.5		μA
VCMR	Common Mode Range		2.2	VCC	2.2	VCC	2.2		VCC	2.2	VCC	V
VPP	Minimum		200		200		200			200		mV
	Peak-to-Peak Input1
VIH	Input HIGH	10ELT	3.770	4.110	3.830	4.16	3.870		4.19	3.930	4.265	V	VCC = 5.0V
	Voltage	100ELT	3.835	4.120	3.835	4.12	3.835		4.12	3.835	4.120
VIL	Input LOW	10ELT	3.05	3.500	3.05	3.520	3.05		3.520	3.05	3.550	V	VCC = 5.0V
	Voltage	100ELT	3.19	3.525	3.19	3.525	3.19		3.525	3.19	3.525
VBB	Reference	10ELT	3.57	3.70	3.62	3.73	3.65		3.75	3.69	3.81	V	VCC = 5.0V
	Output	100ELT	3.62	3.74	3.62	3.74	3.62		3.74	3.62	3.75

1. 200mV input guarantees full logic swing at the output.

AC CHARACTERISTICS (VCC = 4.75V to 5.25V; TA = ±40°C to 85°C)

±40°C

0°C

25°C

85°C

Symbol

Characteristic

Min

Max

Min

Max

Min

Typ

Max

Min

Max

Unit

Condition

tPLH

Propagation Delay1

2.0

5.5

2.0

5.5

2.0

5.5

2.0

5.5

ns

CL = 20pF

t

Propagation Delay1

2.0

5.5

2.0

5.5

2.0

5.5

2.0

5.5

ns

C

L

= 20pF

PHL

MOTOROLA

3±2