memory drivers. LM55325 Datasheet

LM55325 drivers. Datasheet pdf. Equivalent

Part LM55325
Description memory drivers
Feature Memory/Clock Drivers LM55325/LM75325 memory drivers general description The LM55325 and LM75325 ar.
Manufacture National Semiconductor
Datasheet
Download LM55325 Datasheet

Memory/Clock Drivers LM55325/LM75325 memory drivers general LM55325 Datasheet
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LM55325
Memory/Clock Drivers
LM55325/LM75325 memory drivers
general description
The LM55325 and LM75325 are monolithic mem-
ory drivers which feature high current outputs as
well as Internal decoding of logic Inputs These Cir-
CUits are designed for use with magnetic memOries
The CirCUit contains two 600 mA sink-switch
pails and two 600 mA source-switch pall s Inputs
A and B determine source selection while the
source strobe (S,) allows the selected source turn
on In the same manner, tnputs C and D determine
Sink selection while the sink strobe (S2) allows the
selected sink turn on
operate at higher source CUI rents fOI a given
lunctlon temperature If thiS method of source
current setting IS not desll ed, then Nodes Rand
R'NT can be shorted externally activating an
Internal reSistor connected from V CC2 to Node R
ThiS pi oVldes adequate base drive for source
currents up to 375 mA with V CC2 ~ 15V or
600 mA with V CC2 ~ 24V
The LM55325 operates 0 aveI the }ull military
temperature range of -55 eta +125 C, while the
LM75325 operates from O°C to +70°C
Sink-output collectors feature an Internal pull-up
reSIStor In parallel with a clamping diode connected
to VCC2 This p,otects the outputs f,am voltage
surges associated with sWitching inductive loads
The source stage features Node R which allows
extreme fleXibility In source CUrl ent selection by
controilingtheamount of base drive to each source
transistor ThiS method of setting the base d"ve
brings the power associated with the reslstol out-
Side the package thereby allOWing the CirCUit to
features
• 600 mA output capability
• 24V output capability
• Dual sink and dual source outputs
• Fast sWitching times
• Source base drive externally adjustable
• Input clamping diodes
• DTLlTTL compatible
schematic and connection diagrams
Dual-In-Line Package
~
3:
U1
U1
W
N
.U...1..
~
.3...:.
U1
W
N
U1
Order Number LM55325J or LM75325J
See Package 17
Order Number LM75325N
See Package 23
truth table
ADDRESS INPUTS STROBE INPUTS
OUTPUTS
SOURCE
AB
SINK
C0
SOURCE SINK
51 S2
SOURCE
Wx
SINK
yZ
L HXX
HL XX
XXL H
X XHL
X XX X
HHHH
L H ON OFF OFF OFF
L H OFF ON OFF OFF
H L OFF OFF ON OFF
H L OFF OFF OFF ON
H H OFF OFF OFF OFF
X X OFF OFF OFF OFF
H '" high level, L == low level, X == Irrelevant
NOTE Not more than one output IS to be on at anyone time
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LM55325
It)
N
C")
It)
absolute maximum ratings
Supply Voltage V ee1 (Note 1)
" Supply VolTdge V CC2 (Note 1)
:..e.. Input VO!\clgt' (Any Addle~~ 01 Strohe Input)
...... ContillUOLJ~ Total DI~~lpallon at (at Belowl
It) 170 C FtpeAII Tempf'l<lture INote 2)
N Opel riling Temper dlul e Rdnqe LM55325
7V
25V
55V
800 mW
55"C to I 12S"C
C")
LM 7S325
O' C 10 170"C
It) StOI dgt' Tempf'l dlllH' Rdnge
.:.e.. aIt) Lp,ld Temper dlur e (Soldering. 1 ~ec)
65 C to 1150' C
300 C
dc electrical characteristics
PARAMETER
CONDITIONS
MIN
High Level Input Voltage
(V 1H )
Low Level Input Voltage
(V 1L )
Input Clamp Voltage (Vd
Source Collectors Tel mrnal
Off State CUr!ent ([OFF)
Source Collectors Termmal
Off State Current (tOFF)
High Level Sink Output
Voltage (V OH )
Saturation Voltage Source
Outputs** (VSAT )
Saturation Voltage Source
OutPuts*" (VSAT )
Saturation Voltage Sink
Outputs~~ (VSAT )
Figure 1 and 2
Figure 3 and 4
Vee1 = 4 5V, VCC2 "' 24V.
liN'" -12 mA, T A" 2bu C,
FIgure 5
V ee1 '" 4 5V, VeC2 "' 24V,
Full Range, FrgUie 1
V CC1 '" 4 5V. V CC2 ~ 24V.
T A'" 25"'C. FlgUle 1
V CC1 '" 4 5V. VCC2 '" 24~.
lOUT'" OV. Flgule 2
V CC1 -" 4 5V. V CC2 '" 15V.
RL '" 24H. ISOURCE ." -600 mAo
Full Range, (Note 3) FlgUle 3
V CC1 '" 4 5V. V CC2 '" 15V,
RL '" 24!2. lS0URCE ~ -600 mAo
T A '" 25°C. (Note 3) Figure 3
V CC1 '" 4 5V. V CC2 15V.
RL '" 24n. ISINK :::: 600 mAo
Full Range. (Note 3) FlgUie 4
19
Saturation Voltage Sink,
Outputs (VSAT )
V CC,1 =- 4 5V. V CC2 '" 15V.
RL '" 24£2, ISINK "" 600 mA,
T A '" 25°C. (Note 3) Figure 4
Input Current at MaXimum
V CC1 '" 5 5V. V CC2 ~ 24V.
Input Voltage Address Inputs (II) VI := ,5 5V. Figure 5
Input Current at MaXimum
Input Voltage Strobe Inputs (II)
V CCt '" 5 5V, V CC2 '" 24V,
VI := 5 5V, Figure 5
High Level Input Current
Address Inputs (tIH)
V CC1 '" 5 5V. V Ce2 '" 24V,
VI'" 2 4V. Figure 5
High Level Input Current
Strobe Inputs (lIH)
V CC1 '" S.SV, V CC2 '" 24V.
VI'" 2 4V, Figure 5
Low Level Input Current
Address Inputs (IILI
V CC1 '" S SV, V ee2 '" 24V,
aVI '" 4V, Figure S
Low Level Input Current
Strobe Inputs (lId
Supply Current, All Sources and
Smks Off From V CC1 (lCCOFFI
Supply Current, All Sources and
SmksOffFromVcc2 (lCCOFF)
Supply Current From V CC1,
Either Sink On (lec1)
Supply Current From V ee2 ,
Either Source On (l cC2 )
V ee1 = 5 SV, V ee2 '" 24V,
aVI := 4V, Figure 5
V ec1 '" 5 5V, V ec2 '" 24V,
T A = 25°C, Figure 6
V ec1 '" S 5V, V CC2 =: 24V,
T A"" 2SoC, Figure 6
V eC1 '" 5 5V, V ee2 = 24V,
ISINK '" 50 rnA, T A = 25°C,
Figure 7 .
Vee1 = Ei 5V. Vcc = 24V,
ISOURCE := -50 mAo T A = 25°C,
aFigure
LM55325
TYP*
LIMITS
MAX MIN
08
,-13
-1 7
, 500
150
23
09
19
043 07
09
043 07
40
80
-1 -16
-2 -32
14 22
75 20
55 70
32 50
LM75325
TYP*
MAX
08
-13 -17
200
200
23
09
043 075
09
043 075
40
80
-1 -1,6
-2 -32
14 22
75 20
55 70
32 50
UNITS
V
V
V
"A
"A
V
V
V
V
V
mA
mA
"A
"A
mA
mA
mA
mA
mA
mA
Note 1: Voltage values are With respect to network ground termmal.
Note 2: For operation of LM55325 above +70°C free~air temperature, refer to Dissipation Derating Curve (Figure 12L
Note 3: These parameters must be measured USing pulse techniques. tw = 200,us, duty cycle ~ 2%.
*All typical values are at TA = 25°C.
**Not more than one output is to be on at anyone time.
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