SY10/100E137 Micrel Semiconductor, SY10/100E137 Datasheet

SY10/100E137

Manufacturer Part Number

SY10/100E137

Description

Manufacturer

Micrel Semiconductor

Datasheet

1.SY10100E137.pdf (4 pages)

Current page: 1 of 4
Download datasheet (69Kb)

CLK, CLK

A_Start

FEATURES

PIN NAMES

1.8GHz min. count frequency

Extended 100E V

Synchronous and asynchronous enable pins

Differential clock input and data output pins

Asynchronous Master Reset

Internal 75K input pull-down resistors

Available in 28-pin PLCC packge

PIN CONFIGURATION

CCO

–Q

, EN

A_Start

output for single-ended use

, Q

CLK

–Q

25 24 23 22

Differential Clock Inputs

Differential Q Outputs

Asynchronous Enable Input

Synchronous Enable Inputs

Asynchronous Master Reset

Switching Reference Output

range of –4.2V to –5.5V

TOP VIEW

to Output

PLCC

J28-1

21 20 19

Function

10 11

8-BIT RIPPLE

COUNTER

counters. The two least significant bits were designed

with very fast edge rates, while the more significant bits

maintain standard ECLinPS output edge rates. This allows

the counters to operate at very high frequencies, while

maintaining a moderate power dissipation level.

clock generation, as well as for counters in high-

performance ATE time measurement boards.

available to maximize the device's flexibility for various

applications. The asynchronous enable input, A_Start,

when asserted, enables the counter while overriding any

synchronous enable signals. The E137 features XOR'ed

enable inputs, EN

the CLK input. When only one synchronous enable is

asserted, the counter becomes disabled on the next CLK

transition. All outputs remain in the previous state poised

for the other synchronous enable or A_Start to be

asserted in order to re-enable the counter.

both synchronous enables causes the counter to become

enabled on the next transition of the CLK. EN

and CLK edges are coincident. Sufficient delay has been

inserted in the CLK path (to compensate for the XOR

gate delay and the internal D-flip-flop set-up time) to

ensure that the synchronous enable signal is clocked

correctly; hence, the counter is disabled.

the V

CLK input signal. If a single-ended signal is to be used,

the V

bypassed to ground via a 0.01 F capacitor. V

only source/sink 0.5mA; therefore, it should be used as

a switching reference for the E137 only.

pull-down resistor. Therefore, do not leave the differential

CLK inputs open. Doing so causes the current source

transistor of the input clock gate to become saturated,

thus upsetting the internal bias regulators and

jeopardizing the stability of the device.

an all zero state upon assertion.

DESCRIPTION

The SY10/100E137 are very high speed binary ripple

The devices are ideally suited for multiple frequency

Both asynchronous and synchronous enables are

The E137 can also be driven single-endedly utilizing

All input pins left open will be pulled LOW via an input

The asynchronous Master Reset resets the counter to

pin should be connected to the CLK input and

output supply as the voltage reference for the

and EN

, which are synchronous to

Rev.: C

Issue Date: February, 1998

SY100E137

SY10E137

FINAL

Amendment: /1

Asserting

(or EN

can

)

Related parts for SY10/100E137

SY10/100E137 Summary of contents

Page 1

... CC 8-BIT RIPPLE COUNTER DESCRIPTION The SY10/100E137 are very high speed binary ripple counters. The two least significant bits were designed with very fast edge rates, while the more significant bits maintain standard ECLinPS output edge rates. This allows the counters to operate at very high frequencies, while maintaining a moderate power dissipation level ...

Page 2

Micrel BLOCK DIAGRAM A_Start R EN1 D Q EN2 Q CLK CLK CLK CLK MR VBB SEQUENTIAL TRUTH TABLE Function EN EN A_Start 1 2 Reset X X Count Stop ...

Page 3

Micrel DC ELECTRICAL CHARACTERISTICS (Min (Max.); Symbol Parameter V Output Reference BB Voltage 10E 100E I Input HIGH Current IH I Power Supply EE Current 10E 100E AC ELECTRICAL CHARACTERISTICS ...

Page 4

Micrel 28 LEAD PLCC (J28-1) MICREL-SYNERGY 3250 SCOTT BOULEVARD SANTA CLARA CA 95054 USA + 1 (408) 980-9191 TEL This information is believed to be accurate and reliable, however no responsibility is assumed by Micrel for its use nor for ...

Related keywords

SY10/100E137 datasheet
SY10/100E137 data sheet
SY10/100E137 pdf datasheet
SY10/100E137 component
SY10/100E137 part
SY10/100E137 distributor
SY10/100E137 RoHS
SY10/100E137 datasheet download