Datasheet SY10E337, SY100E337 Datasheet (MICREL)

3-BIT SCANNABLE
REGISTERED BUS
TRANSCEIVER

SY10E337

SY100E337

FEATURES

■ 1500ps max. clock to bus (data transmit)

■ 1000ps max. clock to Q (data receive)

■ Extended 100E VEE range of –4.2V to –5.5V

■ 25Ω cutoff bus outputs

■ 50Ω receiver outputs

■ Scannable implementation of E336

■ Synchronous and asynchronous bus enables

■ Non-inverting data path

■ Bus outputs feature internal edge slow-down

capacitors

■ Additional package ground pins

■ Fully compatible with industry standard 10KH,

100K ECL levels

■ Internal 75KΩ input pulldown resistors

■ Fully compatible with Motorola MC10E/100E337

■ Available in 28-pin PLCC package

PIN CONFIGURATION

0

CCO

Q

V

ABUSDIS

Q2

GND

BUS2

18

GND

17

BUS0

16

VCC

15

Q

1

14

VCCO

13

BUS1

12

GND

SCAN

S-IN
TEN

VEE

REN

CLK

A1

SBUSEN

SYNCEN

B0

A0

25 24 23 22 21 20 19
26
27
28

1
2
3
4

TOP VIEW

PLCC

J28-1

5 6 7 8 9 10 11

B2

B1

A2

VCCO

DESCRIPTION

The SY10/100E337 are 3-bit registered bus transceivers
with scan designed for use in new, high- performance ECL
systems. The bus outputs (BUS0–BUS2) are designed to
drive a 25Ω bus; the receive outputs (Q0–Q2) are designed
for 50Ω. The bus outputs feature a normal logic HIGH level
(VOH) and a cutoff LOW level of –2.0V and the output
emitter-follower is “off”, presenting a high impedance to the
bus. The bus outputs also feature edge slow-down
capacitors.

Both drive and receive sides feature the same logic,
including a loopback path to hold data. The LOAD/HOLD
function is controlled by Transmit Enable (TEN) and Receive
Enable (REN) on the transmit and receive sides,
respectively, with a HIGH selecting LOAD. The
implementation of the E337 Receive Enable differs from
that of the E336.

A synchronous bus enable (SBUSEN) is provided for
normal, non-scan operation. The asynchronous bus disable
(ABUSDIS) disables the bus for scan mode.

The SYNCEN input allows either synchronous or
asynchronous re-enabling after disabling with ABUSDIS.
An alternative use is asynchronous-only operation with
ABUSDIS, in which case SYNCEN is tied LOW. SYNCEN
is implemented as an overriding SET control to the enable
flip-flop.

Scan mode is selected by a logic HIGH at the SCAN
input. Scan input data is shifted in through S-IN, and output
data appears at the Q2 output.

All registers are clocked on the rising edge of CLK.
Additional lead-frame grounding is provided through the
ground pins (GND) which should be connected to 0V. The
GND pins are not electrically connected to the chip.

PIN NAMES

Pin Function

A0–A2 Data Inputs A
B0–B2 Data Inputs B
S-IN Serial (Scan) Data Input
TEN, REN LOAD/HOLD Controls
SCAN Scan Control
ABUSDIS Asynchronous Bus Disable
SBUSEN Synchronous Bus Enable
SYNCEN Synchronous Enable Control
CLK Clock
BUS0–BUS2 25Ω Cutoff BUS Outputs
Q

0–Q2 Receive Data Outputs (Q2 serves as

SCAN_OUT in scan mode)

VCCO VCC to Output

Rev.: C Amendment: /2

1

Issue Date: February, 1998

Micrel

BLOCK DIAGRAM

SY10E337

SY100E337

BUS

2

Q

D

Q

A

2

B

2

D

Q

2

SCAN-OUT

BUS

1

A0

B0
S-IN
TEN

REN

SCAN

ABUSDIS

SBUSEN
SYNCEN

CLK

D

D

D

SET

Q

Q

Q

1

A
B

1

D

Q

D

Q

Q

1

BUS

Q

0

0

2

Micrel

SY100E337

DC ELECTRICAL CHARACTERISTICS

VEE = VEE (Min.) to VEE (Max.); VCC = VCCO = GND

TA = 0°CTA = +25°CTA = +85°C

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

VCUT Cut-off Output Voltage –2.10 —–2.03 –2.10 —–2.03 –2.10 —–2.03 V 1

IH Input HIGH Current ——150 ——150 ——150 µA —

I

All Other Inputs

EE Power Supply Current mA —

I

10E — 145 174 — 145 174 — 145 174

100E — 145 174 — 125 174 — 167 200

NOTE:

1. Applies to BUS outputs only. Measured with V

TT = –2.10V.

AC ELECTRICAL CHARACTERISTICS

VEE = VEE (Min.) to VEE (Max.); VCC = VCCO = GND

TA = 0°CTA = +25°CTA = +85°C

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

PLH Propagation Delay to Output ps —

t
tPHL CLK to Q 450 — 1000 450 — 1000 450 — 1000

CLK to BUS 800 — 1800 800 — 1800 800 — 1800
ABUSDIS 500 — 1500 500 — 1500 500 — 1500
SYNCEN 800 — 1800 800 — 1800 800 — 1800

t

S Set-up Time ps —

BUS 350 ——350 ——350 ——
SBUSEN 100 ——100 ——100 ——
Data, S-IN 400 ——400 ——400 ——
TEN, REN, SCAN 550 ——550 ——550 ——

H Hold Time ps —

t

BUS 350 ——350 ——350 ——
SBUSEN 500 ——500 ——500 ——
Data, S-IN 350 ——350 ——350 ——
TEN, REN, SCAN 200 ——200 ——200 ——

tPW Minimum Pulse Width 400 ——400 ——400 ——ps —

r Rise/Fall Time ps —

t
tf 20% to 80% (Qn)300— 800 300 — 800 300 — 800

20% to 80% (BUSn Rise) 500 — 1000 500 — 1000 500 — 1000
20% to 80% (BUSn Fall) 300 — 800 300 — 800 300 — 800

SY10E337

PRODUCT ORDERING CODE

Ordering Package Operating

Code Type Range

SY10E337JC J28-1 Commercial
SY10E337JCTR J28-1 Commercial
SY100E337JC J28-1 Commercial
SY100E337JCTR J28-1 Commercial

3

Micrel

28 LEAD PLCC (J28-1)

SY10E337

SY100E337

Rev. 03

MICREL-SYNERGY 3250 SCOTT BOULEVARD SANTA CLARA CA 95054 USA

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